Difference between revisions of "X-UAV Mini Talon VTOL Project"

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[[File:BTI.png|link=AIRCRAFT|AIRCRAFT]]<br>
 +
<i><small>© Mark Qvale - October, 2019</small></i><br>
 +
{| cellspacing="1" cellpadding="1" width="95%" border="0"
 +
|-
 +
| align="left" valign="top" width="30%" | __TOC__
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| align="right" valign="top" width="70%" | [[File:MTV01.JPG|600px]]
 +
|-
 +
| &nbsp;
 +
| align="right" width="50%" | Ready!
 +
|}
 +
<br><br>
 +
{{UnderConst}}
 +
<br><br>
  
 +
==<br> Introduction ==
  
−
== Introduction ==
+
First, some acknowledgements-<br>
 +
Many thanks to '''ATX_Heli''' from RCGroups and the APM dev team, '''Tridge''', also from RCG and the APM dev team and '''Greg Covey''' who did a really great write-up of his E-Flite Convergence conversion to APM. Their combined help and write-ups were invaluable to this project!<br><br>
 +
 
 +
So, I have been resisting doing a VTOL version of the Mini Talon because I knew it would be an all consuming project that would take some time. It has been!. It has also been a really fun challenging project and hopefully the results will speak for themselves.<br>
 +
 
 +
To begin, when I first started on this project I set up some simple design parameters to aim for:<br>
 +
 
 +
:* Relatively light weight - <1750g with a 5200/4S Lipo pack
 +
:* Minimum Carbon Fiber components - To keep any RF interference low
 +
:* Three-motor tilt rotor configuration - This should help with the weight
 +
:* Bolt-on rear motor mount - Keeps stock motor mount
 +
:* No additional booms or struts added to the fuselage (modified wings only)
 +
:* The ability to use a Matek F405-wing flight controller with Chibios/Arduplane Q-Plane firmware<br><br>
 +
 
 +
So far nearly all of this has been achieved with only one small support bracket in the fuse and a little extra weight above my initial parameter (+42g)
 +
 
 +
Below are my build notes, print files and a flight review of this new Mini Talon configuration.<br><br>
 +
 
 +
== General Specifications  ==
 +
 
 +
'''Initial Build'''<br>
 +
Seller - '''[http://www.readymaderc.com/ ReadyMadeRC, USA]'''<br>Aircraft - X_UAV Mini Talon<br>Modification Date - October, 2019<br><br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="900" align="center"
 +
|-
 +
| align="right" | Airframe Type -&nbsp;
 +
| Top Wing V-Tail FPV Specialist
 +
| width="75" |
 +
| align="right" | All-Up Weight -&nbsp;
 +
| 63oz (1792g) w/ 4S/5200 Lipo Pack
 +
|-
 +
| align="right" | Wingspan -&nbsp;
 +
| 51 inches (1300mm)
 +
|
 +
| align="right" | Length -&nbsp;
 +
| 38 inches (965mm)
 +
|-
 +
| align="right" | Wing Area -&nbsp;
 +
| 3.23 ft^2 (30dm^2)
 +
|
 +
| align="right" | Wing Load w/5.2-4S -&nbsp;
 +
| 19.5 oz/ft^2 (59g/dm^2)
 +
|-
 +
| align="right" | Front Motors -&nbsp;
 +
| BrotherHobby 2806.5-1300kv
 +
|
 +
| align="right" | Rear Motor -&nbsp;
 +
| Cobra CPL2207-1800kv
 +
|-
 +
| align="right" | Front Propellers -&nbsp;
 +
| Graupner 8x5 E-Prop (4S)
 +
|
 +
| align="right" | Rear Propeller -&nbsp;
 +
| HQProp 6x4.5 Bull Nose
 +
|-
 +
| align="right" | *Lifting Static Thrust -&nbsp;
 +
| 3365g
 +
|
 +
| align="right" | *Forward Static Thrust -&nbsp;
 +
| 2744g
 +
|-
 +
| align="right" | Lifting Static Thrust:Weight -&nbsp;
 +
| 1.9
 +
|
 +
| align="right" | Forward Static Thrust:Weight -&nbsp;
 +
| 1.5
 +
|-
 +
| align="right" | Max Continuous Power (4S) -&nbsp;
 +
| 1175 watts continuous (4S)
 +
|
 +
| align="right" | Max Forward Flight Power -&nbsp;
 +
| 874 watts continuous (4S)
 +
|-
 +
| align="right" | Battery Type -&nbsp;
 +
| 4S1P 5.2Ah Multistar Lipo
 +
|
 +
| align="right" | In-Flight Battery Capacity -&nbsp;
 +
| 4400mah/10C (85%)
 +
|-
 +
| align="right" | In flight efficiency -&nbsp;
 +
| TBA <!--<130mAh/mile (<81mAh/km) Typ.-->
 +
|
 +
| align="right" | Flight Time -&nbsp;
 +
| TBA
 +
|-
 +
| align="right" | COG -&nbsp;
 +
| 60mm @ Wing root (Stock)
 +
|
 +
| align="right" | *Static Test Conditions&nbsp;
 +
| @ 2550ft ASL&nbsp;
 +
|}
 +
<br>
 +
 
 +
== Components/Flight Gear ==
 +
 
 +
<!--Below is the approximate layout of installed components:<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="700" align="center"
 +
|-
 +
| align="center" | [[File:SSMM11a.JPG|900px]]
 +
|}
 +
<br><br>
 +
-->
 +
 
 +
==== Power Set-up ====
 +
 
 +
To determine front and rear motor sizes I first looked at how the weight of the plane would be distributed with respect to the three lift points and a CG of 60mm from the leading edge. The image below shows the weight mapping for the current 1792g AUW:
 +
<br>
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV15.jpg|450px]]
 +
|}
 +
<br>
 +
 
 +
From this picture I determined the front motors need to lift 709 grams each and the rear motor, 374 grams for a theoretical stable hover. What I then did was look for motors as light as possible that could produce near these thrust numbers at 60% or less throttle.<br>
 +
 
 +
With this information, I started with Racestar 2508-1275 motors on the front and a Cobra CPL2207-1800 motor on the rear. The Racestar motors worked well enough for my initial hover tests but I felt I needed a little more power and so they were replaced with Brotherhobby 2806.5-1300 units to get a bit more lift power and more headroom on the motor current.
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV14.jpg|450px]]
 +
|-
 +
| align="center" | Racestar 2508 and Brotherhobby 2806.5
 +
|}
 +
<br>
 +
 
 +
For motor control I have chosen HGLRC Trex 60A, BLHeli_32 Opto ESC's with Active Freewheeling enabled. On all three motors I am using MR30, 3 pin connectors so they can easily be changed or reversed. Props were determined from bench testing with a 4S pack. The 8x5 Graupner front props are one of my favorite 8" Multirotor props and they also work extremely well on fixed wing.
 +
<br>
 +
 
 +
'''Power Parts'''<br>
 +
:* Front Motors - <u>[https://www.cyclonefpv.com/products/brotherhobby-avenger-2806-5-1300kv-1700kv?variant=21221780455483 Brotherhobby Avenger 2806.5-1300kv]</u>
 +
:* Rear Motors - <u>[https://innov8tivedesigns.com/cobra-cpl-2207-1800-champion-lite-series-multirotor-motor-kv-1800 Cobra CPL2207-1800kv]</u>
 +
:* ESC - <u>[https://www.banggood.com/HGLRC-BS60A-60A-BLHeli_32-3-6S-ESC-Dshot1200-For-RC-Drone-FPV-Racing-Multi-Rotor-p-1240022.html?rmmds=myorder&cur_warehouse=CN HGLRC T-Rex 60A BLHeli_32 ESC]</u>
 +
:* Left Front Prop - <u>[https://www.getfpv.com/hqprop-6x4-5r-cw-bullnose-propeller-black-carbon-composite-set-of-2.html HQProp 6 x 4.5 Bull Nose-CW]</u>
 +
:* Right Front Prop - <u>[https://www.getfpv.com/hqprop-6x4-5-ccw-bullnose-propeller-set-of-2-black.html HQProp 6 x 4.5 Bull Nose-CCW]</u>
 +
:* Battery - Multistar 4S/5200, 10C, 438g<br><br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV13.jpg|800px]]
 +
|-
 +
| align="center" | Brotherhobby specification
 +
|}
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV11.jpg|900px]]
 +
|}
 +
<br><br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV12.jpg|600px]]
 +
|-
 +
| align="center" | Cobra specification
 +
|}
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV18.JPG|900px]]
 +
|}
 +
<br><br>
 +
 
 +
==== Front Motor Mounts ====
 +
 
 +
This design has had many revisions to date and likely will have a few more. Again my goal was to make it light, simple and strong.<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="900" align="center"
 +
|-
 +
| align="center" | [[File:MTV19.jpg|600px]]
 +
|}
 +
<br>
 +
 
 +
While I won't show all the versions and revisions of the front mounts, here are a few:<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV27a.jpg|900px]]
 +
|-
 +
| align="center" | Version 1/2
 +
|}
 +
<br>
 +
 
 +
Version 3 was very similar with a stretched out mount. It looked nice but I felt it still blocked too much of the prop thrust.<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV22.JPG|600px]]
 +
|-
 +
| align="center" | Version 3
 +
|}
 +
<br>
 +
 
 +
For a short time I considered an offset mount so that I could use a larger prop and not have the forward flight position too far forward. The problem with this idea is, I would need a much larger, more powerfull servo.<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV29.JPG|600px]]
 +
|-
 +
| align="center" | Version 4
 +
|}
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV28.JPG|600px]]
 +
|-
 +
| align="center" | Version 4 parts
 +
|}
 +
<br>
 +
 
 +
The current version (6) uses the main mount piece from V4 and a straight motor mount together with an 8mm x 175mm CF tube to get the moment forces spread accross more of the wing.<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV30.jpg|800px]]
 +
|-
 +
| align="center" | Current Set-up
 +
|}
 +
<br>
 +
 
 +
===== Front Motor Mounts Assembly =====
 +
 
 +
Here is a map/image of one motor arm assembly:<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV34.JPG|800px]]
 +
|}
 +
<br>
 +
 
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV23.JPG|409px]]
 +
|-
 +
| align="center" | Groove tool detail
 +
|}
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV24.JPG|500px]]
 +
|-
 +
| align="center" | Current
 +
|}
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV25.JPG|500px]]
 +
|-
 +
| align="center" | Current
 +
|}
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV26.JPG|500px]]
 +
|-
 +
| align="center" | Current
 +
|}
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV30.jpg|700px]]
 +
|-
 +
| align="center" | Current
 +
|}
 +
<br>
 +
 
 +
==== Rear Motor Mount ====
 +
 
 +
For the rear mount I wanted to keep it simple, light weight and easy to install using the stock rear motor mount.
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV17.JPG|600px]]
 +
|-
 +
| align="center" | Rear mount assembly
 +
|}
 +
<br>
 +
 
 +
===== Rear Motor Mount Assembly =====
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV41.JPG|700px]]
 +
|-
 +
| align="center" | Rear VTOL Assembly
 +
|}
 +
<br><br>
 +
 
 +
Rear mount assembly parts:<br>
 +
 
 +
{| border="1" cellspacing="1" cellpadding="1" width="300" align="center"
 +
|-
 +
| align="left" | DESCRIPTION
 +
| align="center" | QTY
 +
|-
 +
| align="left" | Motor/Prop Assembly
 +
| align="center" | 1
 +
|-
 +
| align="left" | SHCS M3 x 6mm
 +
| align="center" | 4
 +
|-
 +
| align="left" | M3 Flat Washer
 +
| align="center" | 4
 +
|-
 +
| align="left" | 12mm Tube Clamps w/screws
 +
| align="center" | 2
 +
|-
 +
| align="left" | Motor Mount Plate
 +
| align="center" | 1
 +
|-
 +
| align="left" | Rear Support Bracket
 +
| align="center" | 1
 +
|-
 +
| align="left" | CF Tube Front Support Bracket
 +
| align="center" | 1
 +
|-
 +
| align="left" | CF Tube, 12mm x 10mm x 175mm &nbsp;
 +
| align="center" | 1
 +
|}
 +
<br>
 +
 
 +
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 +
|-
 +
| align="center" | [[File:MTV16.jpg|600px]]
 +
|-
 +
| align="center" | Support plate inside view
 +
|}
 +
<br>
 +
 
 +
=== Flight Control ===
 +
 
 +
For flight control I stayed with the Matek F405-wing with Chibios/Arduplane running with Q_Plane parameters enabled. For the initial vertical flight test I ran it with all default parameters needed only the motor tilt angles needing parameter adjustment. For the first flight shown in the video, I changed the parameter which controls pitch trim between vertical and forward flight and added a little expo to my transmitter.
 +
<br>
 +
 
 +
More TBA
 +
<br><br>
 +
 
 +
== First Flight! ==
 +
 
 +
19 October, 2019<br><br>
 +
 
 +
'''Video'''<br>
 +
 
 +
<plainhtml>
 +
<table align="center" width="900" border="0"><tr><td align="center">
 +
<iframe width="853" height="488" src="https://www.youtube.com/embed/Ge0AJW8icyw" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
 +
<p>First Flight! - 1 February, 2019</p>
 +
</td></tr></table>
 +
</plainhtml>
 +
<br><br>
 +
 
 +
=== Parting Shot ===
 +
<br>
 +
 
 +
== Project 3D Print Files ==
 +
<br>
 +
All prints were were setup with 50%-90% infill and a 1mm shell thickness. Weights are shown as printed in Hatchbox ABS.
 +
<br>
 +
 
 +
{| border="1" cellspacing="1" cellpadding="1" align="left" width=75%
 +
|-
 +
| width="200" align="Left" | &nbsp;'''Image'''
 +
| width="75" align="Center" | '''Part Number'''
 +
| width="230" align="Left" | &nbsp;'''Part Description'''
 +
| width="90" align="Center" | &nbsp;'''Weight/Infill'''
 +
| width="75" align="Center" | '''Print File'''
 +
| align="Left" | &nbsp;'''Compatibility Notes'''
 +
|-
 +
| align="Left" | [[File:52220sm.JPG]]
 +
| align="Left" | &nbsp;'''52220'''
 +
| align="Left" | &nbsp;MT VTOL Front Arm 80mm
 +
| align="Left" | &nbsp;16.4g/90%
 +
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52220.STL 52220.STL]
 +
| align="Left" | &nbsp;80mm Front Motor Arm
 +
|-
 +
| align="Left" | [[File:52221sm.JPG]]
 +
| align="Left" | &nbsp;'''52221'''
 +
| align="Left" | &nbsp;MT VTOL Motor Mount Bracket
 +
| align="Left" | &nbsp;10.6g/90%
 +
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52221.STL 52221.STL]
 +
| align="Left" | &nbsp;Fits motors with 16-19mm mount holes
 +
|-
 +
| align="Left" | [[File:52222sm.JPG]]
 +
| align="Left" | &nbsp;'''52222'''
 +
| align="Left" | &nbsp;MT VTOL Front Lower Assembly Cover
 +
| align="Left" | &nbsp;4.2g/50%
 +
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52222.STL 52222.STL]
 +
| align="Left" | &nbsp;Wiring cover for the front wing mount
 +
|-
 +
| align="Left" | [[File:52223sm.JPG]]
 +
| align="Left" | &nbsp;'''52223'''
 +
| align="Left" | &nbsp;MT VTOL Front Upper Assembly Cover
 +
| align="Left" | &nbsp;2.6g/50%
 +
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52223.STL 52223.STL]
 +
| align="Left" | &nbsp;Clamping cover for the front wing mount
 +
|-
 +
| align="Left" | [[File:52224sm.JPG]]
 +
| align="Left" | &nbsp;'''52224'''
 +
| align="Left" | &nbsp;MT VTOL Rear Motor mount Forward Support Bracket
 +
| align="Left" | &nbsp;4.2g/80%
 +
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52224.STL 52224.STL]
 +
| align="Left" | &nbsp;Front support for the 12mm CF tube
 +
|-
 +
| align="Left" | [[File:52225sm.JPG]]
 +
| align="Left" | &nbsp;'''52225'''
 +
| align="Left" | &nbsp;MT VTOL Rear Motor Mount Support
 +
| align="Left" | &nbsp;5.3g/70%
 +
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52225.STL 52225.STL]
 +
| align="Left" | &nbsp;Rear support for the 12mm CF tube
 +
|}
 +
{{Clear1}}
 +
 
 +
== See Also  ==
 +
 
 +
:* [[X-UAV Mini Talon Build Compilation]]
 +
:* [[Parts Catalog - Mini Talon]]
 +
:* [[Current Parts Catalogs]]
 +
<!-- :* [https://www.thingiverse.com/markqv/designs Thingiverse Design Page] -->
 +
 
 +
<br>
 +
 
 +
=== Some of the Vendors I used for this project ===
 +
 
 +
: [https://www.readymaderc.com/ ReadyMadeRC]
 +
: [https://www.getfpv.com/ GetFPV]
 +
: [https://www.cyclonefpv.com Cyclone FPV]
 +
<br>
 +
 
 +
=== Comments? Questions? ===
 +
 
 +
:'''<u>[mailto:qmar80@hotmail.com?Subject=About%20The%20VTOL%20MiniTalon&body=Question? email me!]</u>'''
 +
 
 +
<br><br><br>
 +
 
 +
[[Category:Planes]]
 +
[[Category:Contents]]

Revision as of 21:51, 20 October 2019

AIRCRAFT
© Mark Qvale - October, 2019

MTV01.JPG
  Ready!



Tools.jpg This page or section is under construction and will change going forward.

Questions or Comments? Please contact the Wiki administrator




Introduction

First, some acknowledgements-
Many thanks to ATX_Heli from RCGroups and the APM dev team, Tridge, also from RCG and the APM dev team and Greg Covey who did a really great write-up of his E-Flite Convergence conversion to APM. Their combined help and write-ups were invaluable to this project!

So, I have been resisting doing a VTOL version of the Mini Talon because I knew it would be an all consuming project that would take some time. It has been!. It has also been a really fun challenging project and hopefully the results will speak for themselves.

To begin, when I first started on this project I set up some simple design parameters to aim for:

  • Relatively light weight - <1750g with a 5200/4S Lipo pack
  • Minimum Carbon Fiber components - To keep any RF interference low
  • Three-motor tilt rotor configuration - This should help with the weight
  • Bolt-on rear motor mount - Keeps stock motor mount
  • No additional booms or struts added to the fuselage (modified wings only)
  • The ability to use a Matek F405-wing flight controller with Chibios/Arduplane Q-Plane firmware

So far nearly all of this has been achieved with only one small support bracket in the fuse and a little extra weight above my initial parameter (+42g)

Below are my build notes, print files and a flight review of this new Mini Talon configuration.

General Specifications

Initial Build
Seller - ReadyMadeRC, USA
Aircraft - X_UAV Mini Talon
Modification Date - October, 2019

Airframe Type -  Top Wing V-Tail FPV Specialist All-Up Weight -  63oz (1792g) w/ 4S/5200 Lipo Pack
Wingspan -  51 inches (1300mm) Length -  38 inches (965mm)
Wing Area -  3.23 ft^2 (30dm^2) Wing Load w/5.2-4S -  19.5 oz/ft^2 (59g/dm^2)
Front Motors -  BrotherHobby 2806.5-1300kv Rear Motor -  Cobra CPL2207-1800kv
Front Propellers -  Graupner 8x5 E-Prop (4S) Rear Propeller -  HQProp 6x4.5 Bull Nose
*Lifting Static Thrust -  3365g *Forward Static Thrust -  2744g
Lifting Static Thrust:Weight -  1.9 Forward Static Thrust:Weight -  1.5
Max Continuous Power (4S) -  1175 watts continuous (4S) Max Forward Flight Power -  874 watts continuous (4S)
Battery Type -  4S1P 5.2Ah Multistar Lipo In-Flight Battery Capacity -  4400mah/10C (85%)
In flight efficiency -  TBA Flight Time -  TBA
COG -  60mm @ Wing root (Stock) *Static Test Conditions  @ 2550ft ASL 


Components/Flight Gear

Power Set-up

To determine front and rear motor sizes I first looked at how the weight of the plane would be distributed with respect to the three lift points and a CG of 60mm from the leading edge. The image below shows the weight mapping for the current 1792g AUW:

MTV15.jpg


From this picture I determined the front motors need to lift 709 grams each and the rear motor, 374 grams for a theoretical stable hover. What I then did was look for motors as light as possible that could produce near these thrust numbers at 60% or less throttle.

With this information, I started with Racestar 2508-1275 motors on the front and a Cobra CPL2207-1800 motor on the rear. The Racestar motors worked well enough for my initial hover tests but I felt I needed a little more power and so they were replaced with Brotherhobby 2806.5-1300 units to get a bit more lift power and more headroom on the motor current.

MTV14.jpg
Racestar 2508 and Brotherhobby 2806.5


For motor control I have chosen HGLRC Trex 60A, BLHeli_32 Opto ESC's with Active Freewheeling enabled. On all three motors I am using MR30, 3 pin connectors so they can easily be changed or reversed. Props were determined from bench testing with a 4S pack. The 8x5 Graupner front props are one of my favorite 8" Multirotor props and they also work extremely well on fixed wing.

Power Parts

MTV13.jpg
Brotherhobby specification


MTV11.jpg



MTV12.jpg
Cobra specification


MTV18.JPG



Front Motor Mounts

This design has had many revisions to date and likely will have a few more. Again my goal was to make it light, simple and strong.

MTV19.jpg


While I won't show all the versions and revisions of the front mounts, here are a few:

MTV27a.jpg
Version 1/2


Version 3 was very similar with a stretched out mount. It looked nice but I felt it still blocked too much of the prop thrust.

MTV22.JPG
Version 3


For a short time I considered an offset mount so that I could use a larger prop and not have the forward flight position too far forward. The problem with this idea is, I would need a much larger, more powerfull servo.

MTV29.JPG
Version 4


MTV28.JPG
Version 4 parts


The current version (6) uses the main mount piece from V4 and a straight motor mount together with an 8mm x 175mm CF tube to get the moment forces spread accross more of the wing.

MTV30.jpg
Current Set-up


Front Motor Mounts Assembly

Here is a map/image of one motor arm assembly:

MTV34.JPG



MTV23.JPG
Groove tool detail


MTV24.JPG
Current


MTV25.JPG
Current


MTV26.JPG
Current


MTV30.jpg
Current


Rear Motor Mount

For the rear mount I wanted to keep it simple, light weight and easy to install using the stock rear motor mount.

MTV17.JPG
Rear mount assembly


Rear Motor Mount Assembly
MTV41.JPG
Rear VTOL Assembly



Rear mount assembly parts:

DESCRIPTION QTY
Motor/Prop Assembly 1
SHCS M3 x 6mm 4
M3 Flat Washer 4
12mm Tube Clamps w/screws 2
Motor Mount Plate 1
Rear Support Bracket 1
CF Tube Front Support Bracket 1
CF Tube, 12mm x 10mm x 175mm   1


MTV16.jpg
Support plate inside view


Flight Control

For flight control I stayed with the Matek F405-wing with Chibios/Arduplane running with Q_Plane parameters enabled. For the initial vertical flight test I ran it with all default parameters needed only the motor tilt angles needing parameter adjustment. For the first flight shown in the video, I changed the parameter which controls pitch trim between vertical and forward flight and added a little expo to my transmitter.

More TBA

First Flight!

19 October, 2019

Video


First Flight! - 1 February, 2019



Parting Shot


Project 3D Print Files


All prints were were setup with 50%-90% infill and a 1mm shell thickness. Weights are shown as printed in Hatchbox ABS.

 Image Part Number  Part Description  Weight/Infill Print File  Compatibility Notes
52220sm.JPG  52220  MT VTOL Front Arm 80mm  16.4g/90%  52220.STL  80mm Front Motor Arm
52221sm.JPG  52221  MT VTOL Motor Mount Bracket  10.6g/90%  52221.STL  Fits motors with 16-19mm mount holes
52222sm.JPG  52222  MT VTOL Front Lower Assembly Cover  4.2g/50%  52222.STL  Wiring cover for the front wing mount
52223sm.JPG  52223  MT VTOL Front Upper Assembly Cover  2.6g/50%  52223.STL  Clamping cover for the front wing mount
52224sm.JPG  52224  MT VTOL Rear Motor mount Forward Support Bracket  4.2g/80%  52224.STL  Front support for the 12mm CF tube
52225sm.JPG  52225  MT VTOL Rear Motor Mount Support  5.3g/70%  52225.STL  Rear support for the 12mm CF tube


See Also


Some of the Vendors I used for this project

ReadyMadeRC
GetFPV
Cyclone FPV


Comments? Questions?

email me!




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