Category Archives: News

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Mostro 700 Nitro Released

Mostro 700 Nitro Released

We’re happy to announce that the Mostro 700 Nitro has been released.

This is the most advanced Nitro in the Market and it’s the only one that incorporates the latest design techniques into a Nitro model.

Nitro pilots no longer need to feel left out of the new wave of RC Helicopter design because they now have not just a new Nitro but the most advanced Nitro ever built available.

Mostro Nitro Modern Design

The Mostro 700 Nitro. The first Modern Design Nitro in the market.

The Mostro 700 Nitro is the first Modern nitro in the market that has all the modern design features normally found only in advanced electrics like the Mostro 700 electric.

The Mostro Nitro is available with both DFC or FA (Follower Arms) heads. Both heads feature the famous RigidCore dampening system.
A dampening system that allows rigidity to work at all head speeds including very low ones.

Features always wanted by Nitro pilots and enjoyed by electric pilots are now available in the Mostro Nitro.

A beautiful and sexy design makes the Mostro an attractive model that will turn heads at the flying field.


The Mostro Monoblock

This is truly a new approach that we are introducing in the market.

When designing the Mostro, we wanted to have all the mechanics connected rigidly, without flexible elements unless dampening is required. The result was the design of what we call the Mostro “Monoblock” ( single block).

In the Monoblock design, all elements of the system that affect the gyro sensing are mounted in a rigid superstructure. No part rests on the flexible frames unless it needs dampening.

The Monoblock is actually the flying helicopter.

Everything in the Mostro nitro is readily and easily accessible. Repairs are a breeze and easy access to the engine is unparalleled.

No boom supports needed.

Boom supports are a thing of the past. The machines need to look nicer. The technology is available so why not use it? Yes the obvious answer is Carbon Fiber. The lightness and extreme rigidity of the boom made out of carbon can only be enhanced when a much larger diameter boom is used. Also why round? Because round is the ideal cross-section to handle torque.

It is not only the shape of the boom that  is important, but also how it is supported. In the Mostro we have two far away spaced boom clamps that decrease the bending force applied to the boom.

We also made  the area of physical contact between the clamp and the boom very large so that the  clamp pressure  is spread across a larger area, protecting the tube from damage due to excessive tightening.

Servo layout because symmetry matters…

We wanted to have the shortest possible distance between the swashplate and servos without resorting to weird geometries, that forces the electronic FBL unit to fight back geometry  that is not best suited to mimic what the radio control system’s gimbal does.

No matter what system  you are using, the radio’s gimbal is composed of two potentiometers that measure two angles. Those angles are the  horizontal and the vertical movements of the stick by your finger.

The best way to match that is to have symmetry in those two directions. The  most critical direction in manoeuvres is the side to side movement, which is naturally better driven via two “mirror-image” configuration servos, so that  manoeuvres like fast aileron tic-tocs are performed mostly by the mechanics and less by the electronics trying to compensate for the mechanics weird geometry. This results in  a lessened delay between the FBL gyro sensors  detection of an unintended movement created by odd geometry, and also a lessening of the correction that it has to do to compensate.

Rugged clutch sized for today’s 120 sized engines. No slipping or breaking due to our exclusive no-fatigue shoe spring design.

Very high frame rigidity is achieved with lightweight carbon frame stiffeners elements. 
Really large volume of air cooling system allows leaner engine settings delivering more power than other systems.

Get your Nitro today by clicking here.

New Top Servo Plate for the New Non-Standard Servo Geometries

New Top Servo Plate for the New Non-Standard Servo Geometries

Several manufacturers are coming out with new servos that don’t fit the standard JR and Futaba servo geometry. Due to those new geometries we decided to develop an adjustable geometry top servo plate. The main difference is in that it has the servo posts mounting holes converted to slots for adjustability. 

Avant RC.

New wide Landing Gear, Lower stance frame and color schemes

Based on customer’s feedback we decided to make a new landing gear mold to widen the landing gear. The part will be shipping the week after next and will be available as an spare part and in future kits. Notice also that we made a new version of the frames for an even lower profile. The Landing gear now partially hides inside the canopy. The lower stance frame is a drop-in replacement for the original one and is currently shipping as the standard kit frame in all kits.

This is the red version of a new color scheme available as an optional set. There is also a neon yellow version pictured below. This version is being previewed in the new Mostro Nitro introduced at the IRCHA 2014 event.

The new color schemes will be available as optional parts. Kits will ship with the original canopies. The red scheme uses the same red boom and fin used in the original kit so only the canopy is different.

Mostro Design Insights – Correct Servo linkage geometry design

We have had several people ask us why the servo rods have a slight angle of inclination when at zero degrees pitch. Not knowing any better and seeing other incorrect designs where the linkage rods are perfectly vertical they wonder if there is a mistake in their setups.

We sometimes forget that not everyone is so into perfection and attention to detail so they might not be aware of the level of attention we place on even the slightest details.

Mostro Design Insights – Correct Servo linkage geometry design.

When doing servo linkage geometry you need to take into consideration that the servos are rotating arms and not linear actuators. That being said it’s an inherent part of a rotating actuator device to have a component of travel that’s undesired and perpendicular to the travel of interest. This shift is usually called interaction error.

When designing the geometry one needs to take into account that interaction and try to minimize the effects of it during flight so that the electronics don’t have to work so hard to compensate for mechanical errors. It also help them in the PID engine algorithm calculations so that the deviations from the expected feedback are minimized and less correction is required.

We understand that from a marketing point of view a perfectly vertical linkage rod at zero degrees collective pitch looks very pretty but we are too much of perfectionist hardcore engineers to let marketing dictate the correct functioning of the mechanics instead of math.

To illustrate a simplified view of what we’re referring to please take a look at the following pictures.


In the first picture we can see how the Mostro’s swashplate to servo linkage rod is slightly shifted forward creating a slight angle when compared to a vertical line. This is done on purpose to minimize the effects of interaction.

As you can see in the next picture at a slight positive or negative pitch the link is vertical. This is where most of the flying happens because when your helicopter is flying it needs either a positive or negative pitch angle to generate lift and prevent it from falling. This is where you need to try to have the minimum amount of interaction and it’s why at this point it’s vertical. 

In the next picture you can see that at full pitch the interaction angle now goes the opposite way and it’s half of the total angle cutting in half the potential interaction at full pitch travel.


Compare this to a poorly designed geometry. In this case the rods are vertically aligned and we agree that it looks really pretty because it seems nice and aligned but that where the pretty stops because when full pitch is applied the error from interaction is doubled due to the unnecessarily excessive angle that the fbl system needs to fight against.

You can see in this picture how a poorly designed geometry can increase the interaction error to double what it could be.

It’s this attention to details that make the Mostro such an amazingly awesome flying machine. You wouldn’t think that this level of attention to details is important but when to many are done in a machine design the result is a superbly flying machine. We will continue with a series of articles about design insights on the Mostro.

Hope this helps people understand how the interaction can be minimized with a properly designed geometry.

Avant RC.

Mostro 700 electric gear ratios

Servo arm spacing is 17mm. Most people are using the secraft’s aluminum arms that break in case of a crash.

The stock ratio is:

First pulley 20T, optional 21T, 22T and 23T
Second pulley: 61T
Third Pinion: 17T
Fourth Main Gear: 58T
Ratio =(61/first pulley)*(58/17)

20T = 10.406
21T = 9.910
22T = 9.460
23T = 9.048

You can also use a fixed main gear tooth count of 208.12 and use the standard pulley tooth count.

20 : 208.12
21 : 208.12
22 : 208.12
23 : 208.12


208.12 / 20 = 10.406
208.12 / 21 = 9.910
208.12 / 22 = 9.460
208.12 / 23 = 9.049

Avant RC. 

Avant Ball Links technology

Avant Ball Links technology

Back on 2006 during the design of the Aurora there was one concern we had and that was the ball link systems currently in use by most helicopters. Being that the size of the engines have been increasing, for the most part the rest of the parts have been adapting but the ball link technology has not changed much to reflect this increase in stress loads.

We did a lot of testing using several different brands and although some were acceptable they still had the tendency to pop-out under certain repetitive high stress maneuvers.

Examining the how the ball links wear and what determined the likelihood of a ball failing we determined that we had to address a few aspects of the ball design to minimize the possibility of failure in flight.

Doing so presented several complications because what we wanted to do wasn’t easy to achieve without hurting other aspects of the performance.

From examination of the standard balls after use we found evidence of an edge deformation that could potential make the ball fail in flight.

Here’s a cross section view of a standard ball link:

In this detail you can see the typical wear that the ball will have after some use.

The reason for that is that the edge of the ball is stretched outward when the ball is pulled out of the ball link creating a shape like this after a while making it easier for the ball link to come out in flight.

The kind of plastic used in most ball links is good for compression but not so good for elongation (stretching). Due to this problem most manufacturers add rubber to the plastic formulation making it more resistant to elongation but with the unwanted side effect that it also makes it easier for the ball to pop out.

Most manufacturers try to find a balance between the two so that it gives a reasonable durability and not too much of a “rubbery” feel to it.

Let’s look at the Avant balls and a standard ball:

First you can see a cross section of both and an obvious difference in the cross section of the ring around the ball. This was the area with the most failures we found in the standard balls so a different shape and cross-section area was designed for the Avant ball link. From failure stress simulation and from actual crash results we now know that the ring around the ball is extremely strong and that the failure point is more likely be in the plastic around the rod section.

You can see the section where they differ. This profile shape is the result of research to make this ball more resilient to the effects from insertion and extraction.

On this detail you can see the advanced edge profile designed by Avant that’s used in the Avant ball links.

The way this profile works is by eliminating the stretching that happens when the ball is pulled out of the ball link

Or when it’s pushed into the ball link

This advanced edge shape also makes it possible to use the links in both sides without concerns making fine-tuning the helicopter much easier because you can use half turns to fine tune the response.

This profile allowed us to eliminate the rubber from the ball link making it much less “rubbery” and replace it with a special elastomer that has memory shape and that can be reactivated by heat. This makes the insertion and removal of the balls much harder and to the point that it’s very likely that you’ll need to use ball link pliers in most cases. We traded convenience of hand installation for more difficult pliers installation but with the added security of making it harder to come out.

Keep in mind that the important thing is to make sure your ball links are secure so check and make sure the balls don’t come out easily.

Can be used on both sides

Another Advantage of the technology used in the Avant Ball links is that because of the special profile they can be used in either side so half-a-turn adjustments are possible.

Hopes this explains this technology invented by Avant and how to use it.

Avant RC.


Mostro Spares Price List

Code Description  MAP
AV950001 Avant Mostro 700 Electric Radio Control Kit with DFC head  $  949.00
AV950002 Avant Mostro 700 Electric Radio Control Kit with Follower Arms Head  $  949.00
AV960001 Avant Mostro 700 Nitro Radio Control Kit with DFC head  $  949.00
AV960002 Avant Mostro 700 Nitro Radio Control Kit with Follower Arms Head  $  949.00
AV950080-Y Avant Mostro 700 Electric Painted Fiberglass Canopy Neon Yellow  $  100.00
AV950080-R Avant Mostro 700 Electric Painted Fiberglass Canopy Red  $  100.00
AV960080 Avant Mostro 700 Nitro Painted Fiberglass Canopy Red  $  100.00
AV950085-Y Avant Mostro 700 100% Carbon Tail Boom Neon Yellow  $    59.99
AV950085-R Avant Mostro 700 100% Carbon Tail Boom Red  $    59.99
AV950306-Y Avant Mostro Carbon Vertical Fin Neon Yellow  $    19.99
AV950306-R Avant Mostro Carbon Vertical Fin Red  $    19.99
AV950100 Avant Mostro 1mm x 10mm ID Shaft Spacer  $       4.99
AV950101 Avant Mostro 12mm Collar  $       9.99
AV950102 Avant Mostro Knurled Thumbscrew for Canopy  $       7.99
AV950103 Avant Mostro Canopy Support Post  $       8.99
AV950104 Avant Mostro Mounting Mini-Block  $       4.99
AV950105 Avant Mostro 56mm Rails Spacer (2)  $    11.99
AV950106 Avant Mostro 60mm Rails Spacer (2)  $    11.99
AV950107 Avant Mostro Frames Support Spacer  $    12.99
AV950108 Avant Mostro Swashplate Assembly  $    48.99
AV950109 Avant Mostro Main Shaft  $    21.99
AV950110 Avant Mostro 10mm Spindle  $    11.99
AV950111 Avant Mostro Intermediate Shaft  $       9.99
AV950112 Avant Mostro Top Servo Mounting Plate  $    55.99
AV950113 Avant Mostro Bottom Gear Mechanics Plate  $    59.99
AV950114 Avant Mostro Motor Mount Plate  $    24.99
AV950115 Avant Mostro Gear Mechanics Pillar (2)  $       9.99
AV950116 Avant Mostro Servo Side Post  $       5.99
AV950117 Avant Mostro Back Servo Bushing Post  $       6.99
AV950118 Avant Mostro CCPM Guide Post  $    11.99
AV950119 Avant Mostro Top Main Shaft Bearing Block  $    21.99
AV950120 Avant Mostro Main Gear Hub  $    25.99
AV950121 Avant Mostro Landing Gear  $    14.99
AV950122 Avant Mostro Boom Clamp  $    11.99
AV950123 Avant Mostro CNC Machined Pushrod Guide Bracket  $       9.99
AV950124 Avant Mostro Tail Servo Mount  $       7.99
AV950125 Avant Mostro Tail Fin Support Bracket  $       5.99
AV950126 Avant Mostro Tensioner Arm Torsion Spring  $       7.99
AV950128 Avant Mostro Locking Bracket Torsion Spring  $       7.99
AV950130 Avant Mostro DFC Yoke  $    44.99
AV950131 Avant Mostro DFC Pitch Arm (2)  $    25.99
AV950132 Avant Mostro DFC Pivot with Bearings and Setscrews (2)  $    23.99
AV950133 Avant Mostro DFC Delrin Links with Threaded Rods and Ball Links (2)  $    18.99
AV950134 Avant Mostro DFC Axle (1)  $       9.99
AV950140 Avant Mostro Main Blade Grip Set of two grips  $    69.99
AV950141 Avant Mostro CNC RigidCore™ Dampener set  $    14.99
AV950142 Avant Mostro Main Blade Grip M5 Bushings 8mm OD (2)  $    11.99
AV950150 Avant Mostro FA Yoke  $    44.99
AV950151 Avant Mostro FA Pitch Arm (2)  $    25.99
AV950153 Avant Mostro FA Turnbuckle Threaded Rods (2)  $    15.99
AV950160 Avant Servo Arm Screw with integrated pin M3 (JR) (Qty 3)  $    14.99
AV950161 Avant Servo Arm Screw with integrated pin M2.5 (FUT) (Qty 3)  $    14.99
AV950163 Avant 16mm M2.6 Threaded Rods (3)  $       5.99
AV950164 Avant Air Diverter Plate Bracket Spacer Post (2)  $       8.99
AV950165 Avant Locking Bracket Spacer Post (2)  $       8.99
AV950166 Avant 1mm Spacer for M3 Screws (2)  $       5.99
AV950180 Avant Bladeholder/Caddy for the Mostro 700  $    14.99
AV950181 Avant Hook and Loop 30mm wide buckle strap Standard length (2)  $       6.99
AV950182 Avant Hook and Loop 30mm wide buckle strap Long length (2)  $       7.99
AV950183 Avant Velcro Sticky Back Tape for Canopy  $       4.99
AV950201 Avant Mostro 20T Motor Pulley (6mm Shaft Kit default)  $    16.99
AV950202 Avant Mostro 21T Motor Pulley (6mm Shaft)  $    16.99
AV950203 Avant Mostro 22T Motor Pulley (6mm Shaft)  $    16.99
AV950204 Avant Mostro 23T Motor Pulley (6mm Shaft)  $    16.99
AV950205 Avant Mostro 20T Motor Pulley (8mm Shaft)  $    16.99
AV950206 Avant Mostro 21T Motor Pulley (8mm Shaft)  $    16.99
AV950207 Avant Mostro 22T Motor Pulley (8mm Shaft)  $    16.99
AV950208 Avant Mostro 23T Motor Pulley (8mm Shaft)  $    16.99
AV950209 Avant Mostro 25T Tail Pulley  $    24.99
AV950210 Avant Mostro 26T Tail Pulley (Kit default)  $    24.99
AV950215 Avant Mostro 37T Conical Tail Pulley with plate  $    27.99
AV950216 Avant Mostro 61T Double One-Way Clutch Pulley  $    45.99
AV950217 Avant Mostro 58T CNC Machined Helical Main Gear  $    34.99
AV950218 Avant Mostro 17T Helical pinion  $    16.99
AV950219 Avant Mostro Idler Pulley with Bearings (1)  $    11.99
AV950220 Avant Mostro Idler Tensioner Arm with Bearings (1)  $    11.99
AV950221 Avant Mostro Idler Arm Bearing Post  $       7.99
AV950222 Avant Electric Mostro 700 Motor Belt  $    22.99
AV950223 Avant Mostro 700 Tail Belt  $    34.99
AV950224 Avant Mostro Tail Case with Cap and Bearings  $    64.99
AV950225 Avant Mostro Metal Tail Blade Grip set of two with counter weight  $    27.99
AV950226 Avant Mostro Tail Slider assembly  $    32.99
AV950227 Avant Mostro Tail Pitch L-Lever with Bearings and Liner  $    17.99
AV950228 Avant Mostro Tail Collar for 6mm Shaft  $       6.99
AV950229 Avant Mostro Tail Idler Pulley Post  $       9.99
AV950230 Avant Mostro Tail L Lever Support Bracket  $    14.99
AV950300 Avant Mostro Electric Carbon Side Frame  $    99.98
AV950301 Avant Mostro Electric Carbon Battery Sliding Plate  $    22.99
AV950302 Avant Mostro Carbon Battery Rail Set for one frame  $    14.99
AV950303 Avant Mostro ESC Carbon Plate  $    11.99
AV950304 Avant Mostro CCPM guide Carbon Plate  $       6.99
AV950305 Avant Mostro Air Diverter Carbon Plate  $    11.99
AV950307 Avant Optional Electronics Mounting Side Plates  $    16.99
AV950308 Avant Optional bottom ESC mounting plate Kit  $    44.99
AV950309 Avant Carbon Servo Spacers (10)  $       9.99
AV950310 Avant Mostro Carbon Pushrod with threaded ends  $    14.99
AV950311 Avant Mostro Carbon Diverter Plate Bracket (2)  $    11.99
AV950312 Avant Mostro Carbon Battery Tray Locking Bracket  $    14.99
AV950313 Avant Mostro Knurled Thumbscrew for Air Diverter Plate  $       7.99
AV950314 Avant Optional Horizontal Electronics Mounting Plate  $    26.99
AV950500 Avant 12x24x6 Bearing (1)  $       4.99
AV950540 Avant Mostro Main Blade Grip Bearing Spacer 16×1.0mm  $       8.99
AV950541 Avant Tail Blade Grip Bearing Spacer 8×0.3mm  $       5.99
AV950550 Avant M4x24mm Socket Head Cap Shouldered Screw and M4 Locknut  $       4.99
AV950551 AV950551 Avant M4x18mm Socket Head Cap Shouldered Screw and M4 Locknut for 17T Pinion  $       4.99
AV950552 AV950552 Avant Mostro Main blade Grips M5 Screws and locknuts  $    11.99
AV950800 Avant Zero degree Alignment tool for Mostro 700 Bladegrips  $    14.99
AV950850 Avant Mounting and connection kit for Kontronik Kosmik ESC  $    28.99
AV960400 Avant Mostro Nitro Carbon Side Frame  $    99.98
AV960401 Avant Mostro Nitro Bottom Plate  $    11.99
AV960402 Avant Mostro Nitro Middle Stiffener Plate  $    11.99
AV960403 Avant Mostro Nitro Top Stiffener Plate  $    11.99
AV960404 Avant Mostro Nitro Battery Plate  $    22.95
AV960405 Avant Mostro Nitro Side Frame Stiffener Plate  $    11.99
AV960406 Avant Mostro Nitro Motor Bolts Plate (2)  $    11.99
AV960409 Avant Mostro Nitro Hollow Main Shaft  $    21.99
AV960410 Avant Mostro Nitro Clutch  $    27.99
AV960411 Avant Mostro Nitro Clutch Bell  $    22.99
AV960412 Avant Mostro Nitro Clutch Bell Liner  $       6.99
AV960413 Avant Mostro Nitro Clutch Stack Hollow Threaded Shaft  $       9.99
AV960414 Avant Mostro Nitro 24T Engine Pulley  $    16.99
AV960415 Avant Mostro Nitro 25T Engine Pulley  $    16.99
AV960416 Avant Mostro Nitro 26T Engine Pulley (Kit Default )  $    16.99
AV960417 Avant Mostro Nitro Clutch Stack Nut  $       8.99
AV960418 Avant Mostro Nitro Starter Shaft Bearing Block  $    15.99
AV960419 Avant Mostro Nitro Clutch Stack Sliding Plate  $    38.99
AV960420 Avant Mostro Nitro Aluminum Landing Skids  $    14.99
AV960421 Avant Mostro Nitro Aluminum Landing Skids  $    14.99
AV960430 Avant Mostro Fuel Tank Assembly  $    22.99
AV960431 Avant Mostro Nitro Fuel Tank Hardware  $    16.99
AV960432 Avant Mostro Fuel Tank Rubber Strip  $    12.99
AV960440 Avant Mostro Aluminum CNC Machined Fan  $    44.99
AV960441 Avant Mostro Nitro Motor Mounts  $    35.99
Mostro/Aurora common Parts
AV000110 Avant CCPM Anti-rotation guide Pin  $       5.99
AV000121 Avant Hex Starter Adapter  $    12.99
AV000123 Avant Steel balls M2 (5)  $       8.99
AV000124 Avant Steel balls M3 (5)  $       9.99
AV000126 Avant Standard Ball Link (10)  $       9.99
AV000127 Avant Ball Link Thick Thread (4)  $       4.99
AV000128 Avant Canopy grommets  $       5.99
AV000133 Avant Tail Y-link  $       4.99
AV000135 Avant Washout Y-Link  $       4.99
AV000136 Avant 6mm Starter Shaft  $       9.99
AV000138 Avant Black UV-rated Cable ties  $       4.99
AV000140 Avant Mostro and Aurora Follower Arms with bearings, Y-Links and pins  $    24.99
AV900214 Avant Aluminum Landing Skids  $    12.99
AV900229 Avant Tail Slider threaded Brass Sleeve  $       7.99
AV900242 Avant Tail Output Shaft  $    12.99
AV900245 Avant Tail Hub  $    14.99
AV910309 Avant Cooling Fan ( Kit Default )  $    12.99
AV910311 Avant Fan Shroud Set  $    17.99
AV910314 Avant Fan Hub Threaded 5/16-24 (OS)  $    19.99

Mostro Electric 700 shipping!!!

We’re happy to announce that the Mostro e700 is shipping worldwide. People all over the world are receiving their Mostro kits and posting pictures and videos on Facebook, YouTube and online forums and the response has been overwhelmingly positive. We are very happy that all our work paid off with the result in the best helicopter kit in the market by far. Hope you enjoy your new Mostro helicopter as much as we do ourselves.


Avant RC.

Release of the Mostro kits

Release of the Mostro kits

We’re happy to announce that the Mostro is being released. Production kits are being sent to the rep pilots and we’re getting ready for shipments to customers. Customer shipments could start this week or next week at the latest. We thought we would start shipping today March 31st. but we decided to incorporate a last-minute suggestion from a building session last Saturday to make it easier to do some setups. We’re making that addition right now so that the kits are shipped with them.

As some of you know we spent this last weekend in Las Vegas with our Factory Pilot Jason Bell doing the final testing of the production kit. We built a final production kit on Friday and Saturday and flew it on Sunday. Unfortunately as many of you know since you were this last weekend at the Vegas funfly you saw Sunday’s weather at the Vegas FunFly with winds that were a constant 30-40 mph throughout the day so it was tasking for our pilot but he put the Mostro through some very grueling final tests. We did video record part  of those flights and we have some from previous test sessions so we will be putting them together and posting a video in a couple of days. We also taped a video of the DFC head heli flying at an incredible low 900 rpm even in that wind to demonstrate how the RigidCore dampening system works at any speed regardless of the head type.


Now about the Mostro V2

That’s what we jokingly call it at the factory. We internally call it the V2 Mostro because there have been so many improvements done on the last few months to what people have seen so far that they would easily qualify it as a V2 version of the Mostro. Some of them were already posted like the dual one-way system, the new swashplate and other ones but there are many more.

We need to first thank our fellow heli pilots for your all the feedback we have received because without it we wouldn’t know what customers want or have concerns about so that we can make design changes and improve the design. Here are the changes that are coming out on the release kits:

1) New OPtional additional location to place the ESC.

Some customers told us that they felt better if they had a location to place the ESC outside in the open so we decided to design one and make it a part of the kit. As you can see in the following pictures there is a new ESC plate that allows you to place the ESC under the batteries. This location is also adjustable in height to let you adjust the plate and put it close to your battery packs. Some customers felt very strongly about having that ability so we made it an optional part. We did test it in flight too so we know it works great too.

Top and bottom ESC plates displayed

An actual unit with a large ESC installed.
Notice how the height is adjustable so that you can place it close to your battery packs.

2) New air diverter plate attached to the frames.

In the initial design the air diverter plate was attached to the canopy. Some customer were concerned that the installation of the plate would be difficult and asked if there was a way to attach it to the heli. The answer is yes and it’s now part of the kit. The problem was that we had to have a way to get the batteries in and out so we went ahead and made it into a swiveling diverting plate that at the same time raises the locking bracket for easy insertion of the battery plate. It also serves as an insurance policy so that the battery place won’t slide out even if you forgot to lock it in place.

There is a thumbscrew that keep the whole system locked in place.

View of the new Air Diverter Plate mechanism.

You can see it in motion in this video.

3) New additional location for receiver battery.

Some customers asked us to give them an option for placing a receiver battery in the front too so we made slots for the straps in the new frame-attached diverter plate to allow for a front-mounted battery.

4) Super-Strong Stainless Steel DFC axle.

Also from feedback from customers that had some concerns we now have the DFC axle made out of a strong Stainless steel that’s attached to the pitch arms via a large threaded end of the axle.

5) New side plate on conical pulley.

Again from customer feedback we added a side plate to the conical tail-driving pulley for cases when people don’t tension the tail belt correctly. This will give those customers some peace of mind.

6) Even lighter now.

Even with the heli already being light we decided to revise all the parts to make sure the weight savings were maximized. We were surprised at how much weight we were still able to take off the heli. At the same time we improved on the plates and several part’s geometries. We also refined the styling of some parts like the pitch arms and some other parts.

Improved Geometry and Lighter Top Servo Plate

Improved Geometry and Lighter Top Bottom Gears Plate

Lighter Main Gear Hub and Main Gear

Improved geometry and lighter top Main Shaft bearing block

More refined styling in the pitch arms on both the Follower arms and DFC heads.

7) New Optional electronics mounting plates.

Also from customer’s feedback we made some optional electronics mounting plates that allow for busier electronics for people that want to add telemetry hardware and such. Since these are not needed for all applications they’re available as an option.

We are very happy that we have arrived at this point and are releasing the kits.

We do warn you that the Mostro is a very an addictive helicopter so you better get ready for a ton of fun.

If you haven’t yet go ahead and order yours by clicking on this link.


Avant RC.