Difference between revisions of "Strix StratoSurfer Twin Conversion"

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[[File:BTI.png|link=AIRCRAFT|AIRCRAFT]]<br>
 
[[File:BTI.png|link=AIRCRAFT|AIRCRAFT]]<br>
<i><small>© Mark Qvale - February, 2019</small></i><br>
+
[[File:cc_image.png|20px]]<i><small> Mark Qvale - February, 2019</small></i><br>
 
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{| cellspacing="1" cellpadding="1" width="95%" border="0"
 
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| align="left" valign="bottom" width="30%" | __TOC__  
 
| align="left" valign="bottom" width="30%" | __TOC__  
| align="right" valign="top" width="70%" | [[File:SSMM01b.JPG|700px]]
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==<br> Introduction ==
 
==<br> Introduction ==
  
I have found that I have no love for the top mounted motor gliders. I love the way the Strix StratoSurfer flys especially with the Matek F405-wing controller running Chibios/Arduplane but, that top motor is a PITA in terms of trimming the plane, noise and launches nosing in. So with that and after one year with this plane I've decided to convert it to a twin tractor set-up.<br>
+
I have found that I have no love for the top mounted motor on these types of powered gliders. I do love the way the Strix StratoSurfer flys especially with the Matek F405-wing controller running Chibios/Arduplane -but- the top motor position and angle is a PITA in terms of trimming the plane, noise and launches wanting to nose-dive. So with that, and after one year and over 100 flights with this plane, I've decided to convert it to a twin tractor set-up.<br>
  
Below are my build notes, print files and a flight review of this re-configured plane.<br><br>
+
Below are my build notes, print files and a flight review of this now re-configured plane.<br><br>
  
 
== General Specifications  ==
 
== General Specifications  ==
  
Seller - '''[http://www.readymaderc.com/ ReadyMadeRC, USA]'''<br>Aircraft - Strix Stratosurfer<br>Build Date - February, 2019<br><br>
+
Seller - '''[http://www.readymaderc.com/ ReadyMadeRC, USA]'''<br>Aircraft - Strix Stratosurfer<br>Modification Date - 1 February, 2019<br><br>
  
 
{| border="0" cellspacing="1" cellpadding="1" width=95% align="center"
 
{| border="0" cellspacing="1" cellpadding="1" width=95% align="center"
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==== Power Set-up ====
 
==== Power Set-up ====
  
For power on this build I plan to start with iFlight 2207-1750kv motors and 35A Wraith32 BLHELI ESC's with active freewheeling. I've also added a pair of 1000mfd/35v Low ESR capacitors for noise and v-spike damping.<br>
+
For power on this build I have started with iFlight T2207-1750kv motors and 35A Wraith32 BLHELI ESC's with active freewheeling. I've also added a pair of 1000mfd/35v Low ESR capacitors for noise and v-spike damping.<br>
  
:* Motor - iFlight 2207-1750kv
+
:* Motor - <u>[https://www.getfpv.com/motors/mini-quad-motors/iflight-tachyon-2207-1750kv-motor.html iFlight T2207-1750kv]</u>
:* ESC - 35A Wraith32 BLHELI
+
:* ESC - <u>[https://www.readytoflyquads.com/35a-wraith32-v20-32bit-blheli-esc 35A Wraith32 BLHELI ESC's]</u>
:* Prop - APCe 6 x 4.5 Bull Nose
+
:* Prop - <u>[https://www.apcprop.com/product/b6x4-5e-b4/ APCe 6 x 4.5 Bull Nose]</u>
:* Battery - Multistar 4S/5200, 10C or a 4S/7000 Li-Ion<br><br>
+
:* Battery - Multistar 4S/5200, 10C '''or''' a 4S/7000 Li-Ion<br><br>
  
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
|-
 
|-
| align="center" | [[File:SSMM08a.JPG|800px]]
+
| align="center" | [[File:SSMM08a.JPG|700px]]
 
|-
 
|-
 
| align="center" | Published specs for the iFlight motor
 
| align="center" | Published specs for the iFlight motor
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This design is very similar to some that I did for the Mini Talon. My goal was to make it light, slippery and strong. For my build I printed these in Hatchbox ABS filament at .2mm quality.<br>
 
This design is very similar to some that I did for the Mini Talon. My goal was to make it light, slippery and strong. For my build I printed these in Hatchbox ABS filament at .2mm quality.<br>
 +
 +
<u>Fasteners used:</u>
 +
:4x M3 x 8mm button head screws (Steel)
 +
:4x M3 x 8mm phillips head screws (Nylon)<br>
  
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
|-
 
|-
| align="center" | [[File:SSMM09a.JPG|600px]]
+
| align="center" | [[File:SSMM09b.JPG|600px]]
 
|}
 
|}
 
<br>
 
<br>
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<br><br>
 
<br><br>
  
=== Mount Assemblies ===
+
=== Motor Mount Body Install ===
  
Mounting these is simple enough. Put the wing halves together on the wing spar, measure, set some pins for location, glue them and clamp them in place for 24hrs. Use a straight edge to insure the mounts are lined up and the faces are parallel. I use E6000 glue as it works very well attaching PLA and ABS to EPO foam. Other glues that also work very well are UHU-POR, Beacons FoamTac and Gorilla Clear Contacat cement. Do not use Gorilla expanding glue as it does not bond well to EPO and heat cycling can cause it to separate.<br>
+
Mounting these is simple enough. Put the wing halves together on the wing spar, measure 200mm either side of the center and set some pins for location. 200mm doesn't interfere with flap servos should you choose this option and you can run up to about a 10" prop. Make sure the mount bodies are pushed all the way into the leading edge and use a straight edge to ensure the front faces are parallel. Glue and clamp them in place for 24hrs. I use E6000 glue as it works <u>very</u> well attaching PLA, PETG and ABS to EPO foam. Other glues that also work very well are UHU-POR, Beacons FoamTac and Gorilla Clear Contact cement. '''Do not''' use Gorilla expanding glue as it does not bond well to EPO and heat cycling can cause it to separate.<br>
  
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
|-
 
|-
| align="center" | [[File:SSMM04c.JPG|700px]]
+
| align="center" | [[File:SSMM04e.JPG|700px]]
|-
+
| align="center" | Squared and glued mounts
+
 
|}
 
|}
 
<br>
 
<br>
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'''Motor Wire Routing'''<br>
 
'''Motor Wire Routing'''<br>
  
For wire routing I hot-wired a hole in the center of the motor mount, below the leading edge to a depth of XXXXmm. This coincides with a hollow area that goes nearly to the wing root. I then hot-wired a hole centered in the front/center notch deep enough to access the same hollow area. I ran a piece of silicone wire so that I could pull the ESC/motor wires through the wing to the front of the mount. Last I soldered on a 3-wire connector and the ESC.<br>
+
For wire routing I hot-wired a hole in the center of the motor mount, below the leading edge to a depth of ~50mm. This coincides with a hollow area that goes nearly to the wing root. You will have to go under a small leading edge spar and angle the hole upwards a bit. I then hot-wired a hole centered in the front/center notch deep enough to access the same hollow area. I ran a piece of silicone wire so that I could pull the ESC/motor wires through the wing to the front of the mount. Last I soldered on R30 - 2.0mm x 3 pin motor connectors and the ESC's.<br>
  
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
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<br>
 
<br>
  
''' ESC Mount '''<br>
+
''' ESC Mounting'''<br>
  
I decided to simply use hot glue to attach the ESC's to the bottom of the wing. I did have to cut small notches to accomodate the two capacitors but this was easy enough.<br>
+
I decided to simply use hot glue to attach the ESC's to the bottom of the wing. I did have to cut small notches to accommodate the two capacitors but this was easy enough.<br>
  
 
{| border="0" cellspacing="1" cellpadding="1" width="700" align="center"
 
{| border="0" cellspacing="1" cellpadding="1" width="700" align="center"
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=== Wing Mount ===
 
=== Wing Mount ===
  
The front wing mount comes from the <u>[https://www.itsqv.com/QVM/index.php?title=Parts_Catalog_-_Strix_Stratosurfer#Low_Profile_Canopies Stratosurfer catalog low-profile canopies]</u> and uses 2 - M3 x 40mm screws. The rear wing mount is a copy of the lower portion of the Cobra motor mount and uses 2 - M3 x 30mm screws.<br>
+
The rear wing mount is a copy of the lower portion of my extra tall Cobra motor mount and uses 2 - M3 x 30mm screws. The front wing mount comes from my <u>[https://www.itsqv.com/QVM/index.php?title=Parts_Catalog_-_Strix_Stratosurfer#Low_Profile_Canopies Stratosurfer catalog low-profile canopies]</u> page and uses 2 - M3 x 40mm screws. <br>
  
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
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<br>
 
<br>
  
If you are '''not''' using one of my  low profile canopies, you will need to shave the stock foam canopy down to match the profile.<br>
+
'''NOTE:''' If you are '''not''' using one of my  low profile canopies, you will need to shave the stock foam canopy down to match the profile of the front wing mount.<br>
  
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
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|-
 
|-
 
| align="center" | Example of a shaved foam canopy
 
| align="center" | Example of a shaved foam canopy
|}
 
<br>
 
 
Underneath the rear wing mount I have installed the BN-220 GPS module. It works well here however it is just another wire to hook up if/when you remove and replace the wing. Another good location is on the small rear hatch (where I had it originally).<br>
 
 
{| border="0" cellspacing="1" cellpadding="1" width="800" align="center"
 
|-
 
| align="center" | [[File:SSMM07g.JPG|550px]]
 
 
|}
 
|}
 
<br><br>
 
<br><br>
Line 223: Line 217:
 
'''GPS'''<br>
 
'''GPS'''<br>
  
For the GPS I am using the Beitien BN-220 mini ublox unit from Banggood. I have mounted it under the rear wing mount cover.<br>
+
For the GPS I am using the Beitian BN-220 mini ublox unit from Banggood.com. I have mounted it under the small rear hatch.<br>
  
:* [https://www.banggood.com/Dual-BN-220-GPS-GLONASS-Antenna-Module-TTL-Level-RC-Drone-Airplane-p-1208588.html?rmmds=search&cur_warehouse=CN Beitein BN-220 GPS Module]
+
:* [https://www.banggood.com/Dual-BN-220-GPS-GLONASS-Antenna-Module-TTL-Level-RC-Drone-Airplane-p-1208588.html?rmmds=search&cur_warehouse=CN Beitian BN-220 GPS Module]
 
<br><br>
 
<br><br>
  
Line 235: Line 229:
  
 
'''Video'''<br>
 
'''Video'''<br>
:TBA
+
 
<!--
+
 
<plainhtml>
 
<plainhtml>
 
<table align="center" width="900" border="0"><tr><td align="center">
 
<table align="center" width="900" border="0"><tr><td align="center">
<iframe width="853" height="480" src="https://www.youtube.com/embed/B9c-2mcTnTQ" frameborder="0" allowfullscreen></iframe>
+
<iframe width="853" height="480" src="https://www.youtube.com/embed/c15kbz8uUkQ" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
<p>Maiden Day - 15 January, 2018</p>  
+
<p>First Flight! - 1 February, 2019</p>  
 
</td></tr></table>
 
</td></tr></table>
 
</plainhtml>
 
</plainhtml>
<br>
+
<br><br>
-->
+
 
 
=== Parting Shot ===
 
=== Parting Shot ===
  
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== Project 3D Print Files ==
 
== Project 3D Print Files ==
 +
<br>
 +
All prints were were setup with 50%-80% infill and a 1mm shell thickness. Weights are shown as printed in Hatchbox ABS.
 +
<br>
  
{| border="1" cellspacing="1" cellpadding="1" align="left" width=95%
+
{| border="1" cellspacing="1" cellpadding="1" align="left" width=75%
 
|-
 
|-
 
| width="200" align="Left" | &nbsp;'''Image'''
 
| width="200" align="Left" | &nbsp;'''Image'''
 
| width="75" align="Center" | '''Part Number'''
 
| width="75" align="Center" | '''Part Number'''
 
| width="230" align="Left" | &nbsp;'''Part Description'''
 
| width="230" align="Left" | &nbsp;'''Part Description'''
| width="75" align="Left" | &nbsp;'''Weight'''
+
| width="90" align="Center" | &nbsp;'''Weight/Infill'''
 
| width="75" align="Center" | '''Print File'''
 
| width="75" align="Center" | '''Print File'''
 
| align="Left" | &nbsp;'''Compatibility Notes'''
 
| align="Left" | &nbsp;'''Compatibility Notes'''
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| align="Left" | &nbsp;'''52192'''
 
| align="Left" | &nbsp;'''52192'''
 
| align="Left" | &nbsp;Stratosurfer Twin Motor Mount Body
 
| align="Left" | &nbsp;Stratosurfer Twin Motor Mount Body
| align="Left" | &nbsp;25g
+
| align="Left" | &nbsp;15.3g/60%
 
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52192.STL 52192.STL]
 
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52192.STL 52192.STL]
 
| align="Left" | &nbsp;22xx size motor mount
 
| align="Left" | &nbsp;22xx size motor mount
Line 275: Line 271:
 
| align="Left" | [[File:52193sm.JPG]]
 
| align="Left" | [[File:52193sm.JPG]]
 
| align="Left" | &nbsp;'''52193'''
 
| align="Left" | &nbsp;'''52193'''
| align="Left" | &nbsp;Stratosurfer Twin Motor Mount Front
+
| align="Left" | &nbsp;Stratosurfer Twin Motor Mount Front Piece
| align="Left" | &nbsp;27g
+
| align="Left" | &nbsp;3.2g/80%
 
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52193.STL 52193.STL]
 
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52193.STL 52193.STL]
 
| align="Left" | &nbsp;Fits into the mount body, 52192
 
| align="Left" | &nbsp;Fits into the mount body, 52192
Line 283: Line 279:
 
| align="Left" | &nbsp;'''52194'''
 
| align="Left" | &nbsp;'''52194'''
 
| align="Left" | &nbsp;Stratosurfer Rear Wing Mount
 
| align="Left" | &nbsp;Stratosurfer Rear Wing Mount
| align="Left" | &nbsp;3.5g
+
| align="Left" | &nbsp;8.2g/50%
 
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52194.STL 52194.STL]
 
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52194.STL 52194.STL]
 
| align="Left" | &nbsp;Clamping cover for the rear wing mount
 
| align="Left" | &nbsp;Clamping cover for the rear wing mount
Line 290: Line 286:
 
| align="Left" | &nbsp;'''52156'''
 
| align="Left" | &nbsp;'''52156'''
 
| align="Left" | &nbsp;Stratosurfer Front Wing Mount
 
| align="Left" | &nbsp;Stratosurfer Front Wing Mount
| align="Left" | &nbsp;11.6g
+
| align="Left" | &nbsp;14.5g/50%
 
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52156.STL 52156.STL]
 
| align="Center" | &nbsp;[http://www.itsqv.com/QVM/files/parts/52156.STL 52156.STL]
 
| align="Left" | &nbsp;Low profile wing mount and cover
 
| align="Left" | &nbsp;Low profile wing mount and cover
Line 298: Line 294:
 
== See Also  ==
 
== See Also  ==
  
 +
:* [[Strix StratoSurfer | Stratosurfer Build Page]]
 
:* [[Parts Catalog - Strix Stratosurfer]]
 
:* [[Parts Catalog - Strix Stratosurfer]]
 
:* [[Current Parts Catalogs]]
 
:* [[Current Parts Catalogs]]
Line 306: Line 303:
 
=== Some of the Vendors I used for this project ===
 
=== Some of the Vendors I used for this project ===
  
 +
: [https://www.readymaderc.com/ ReadyMadeRC]
 
: [https://www.getfpv.com/ GetFPV]
 
: [https://www.getfpv.com/ GetFPV]
 
: [https://www.readytoflyquads.com/ Ready to Fly Quads]
 
: [https://www.readytoflyquads.com/ Ready to Fly Quads]

Latest revision as of 12:25, 12 April 2020

AIRCRAFT
Cc image.png Mark Qvale - February, 2019

SSMM01b.JPG
  Super Stratosurfer!


Introduction

I have found that I have no love for the top mounted motor on these types of powered gliders. I do love the way the Strix StratoSurfer flys especially with the Matek F405-wing controller running Chibios/Arduplane -but- the top motor position and angle is a PITA in terms of trimming the plane, noise and launches wanting to nose-dive. So with that, and after one year and over 100 flights with this plane, I've decided to convert it to a twin tractor set-up.

Below are my build notes, print files and a flight review of this now re-configured plane.

General Specifications

Seller - ReadyMadeRC, USA
Aircraft - Strix Stratosurfer
Modification Date - 1 February, 2019

Airframe Type -  Top Wing FPV Specialist All-Up Weight -  60oz (1698g) w/7Ah/4S Liion Pack
Wingspan -  59 inches (1500mm)   61oz (1706g) w/5.2Ah/4S MS Pack
Length -  39 inches (1000mm) COG -  70mm @ Wing root
Wing Area -  2.95 ft^2 (27.4dm^2) Wing Load w/5200mAh/4S -  20.7 oz/ft^2 (62g/dm^2)
Motors -  iFlight 2207-1750kv Max Power (4S) -  640 watts (4S)
Propeller -  L&R APCe 6x4.5 Bullnose Prop Power -  440 watts @ 2550ft ASL
Thrust & Prop Speed -  2022g & 82mph @ 2550ft ASL Thrust/Weight -  1.2:1
Battery Type -  4S1P Lipo -or- 4S2P Li-ion Battery Capacity -  5200mAh/10C or 7000mah/3C
In flight efficiency -  <125mAh/mile (<78mAh/km) Typ. Flight Time -  80 min
       


Components/Flight Gear

Below is the approximate layout of installed components:

SSMM11a.JPG



Power Set-up

For power on this build I have started with iFlight T2207-1750kv motors and 35A Wraith32 BLHELI ESC's with active freewheeling. I've also added a pair of 1000mfd/35v Low ESR capacitors for noise and v-spike damping.

SSMM08a.JPG
Published specs for the iFlight motor


SSMM21a.JPG
Prop chart for the iFlight motor



Motor Mounts

This design is very similar to some that I did for the Mini Talon. My goal was to make it light, slippery and strong. For my build I printed these in Hatchbox ABS filament at .2mm quality.

Fasteners used:

4x M3 x 8mm button head screws (Steel)
4x M3 x 8mm phillips head screws (Nylon)
SSMM09b.JPG


SSMM03a.JPG
Print orientation



Motor Mount Body Install

Mounting these is simple enough. Put the wing halves together on the wing spar, measure 200mm either side of the center and set some pins for location. 200mm doesn't interfere with flap servos should you choose this option and you can run up to about a 10" prop. Make sure the mount bodies are pushed all the way into the leading edge and use a straight edge to ensure the front faces are parallel. Glue and clamp them in place for 24hrs. I use E6000 glue as it works very well attaching PLA, PETG and ABS to EPO foam. Other glues that also work very well are UHU-POR, Beacons FoamTac and Gorilla Clear Contact cement. Do not use Gorilla expanding glue as it does not bond well to EPO and heat cycling can cause it to separate.

SSMM04e.JPG


Front Piece

After printing use a clamp to maintain the integrity of the front piece and tap the four radial holes to M3. Once tapped, coat the threads with thin CA to add strength. You may have to file or sand the outside diameter of the four ears so the front piece will fit into the main mount body.

SSMM03b.JPG
Clamped front piece


Motor Wire Routing

For wire routing I hot-wired a hole in the center of the motor mount, below the leading edge to a depth of ~50mm. This coincides with a hollow area that goes nearly to the wing root. You will have to go under a small leading edge spar and angle the hole upwards a bit. I then hot-wired a hole centered in the front/center notch deep enough to access the same hollow area. I ran a piece of silicone wire so that I could pull the ESC/motor wires through the wing to the front of the mount. Last I soldered on R30 - 2.0mm x 3 pin motor connectors and the ESC's.

SSMM04a.JPG
Wire route


ESC Mounting

I decided to simply use hot glue to attach the ESC's to the bottom of the wing. I did have to cut small notches to accommodate the two capacitors but this was easy enough.

SSMM04d.JPG
ESC craddle



Wing Mount

The rear wing mount is a copy of the lower portion of my extra tall Cobra motor mount and uses 2 - M3 x 30mm screws. The front wing mount comes from my Stratosurfer catalog low-profile canopies page and uses 2 - M3 x 40mm screws.

SSMM07f.JPG


NOTE: If you are not using one of my low profile canopies, you will need to shave the stock foam canopy down to match the profile of the front wing mount.

SPC21.JPG
Example of a shaved foam canopy



Flight Control

Since I am already using the Matek F405-wing flight controller with Chibios/Arduplane firmware there is absolutely no reason to change this, it is fantastic!

Links to this board -


GPS

For the GPS I am using the Beitian BN-220 mini ublox unit from Banggood.com. I have mounted it under the small rear hatch.



Re-Maiden!

Maiden - 01 February, 2019

Weather was perfect with temp at ~70F a very light breeze and clear skies. The first flight was uneventful in terms of drama and I flew her for about 20 minutes. In two subsequent flights I did an uneventful hand launch a session of auto-tune and lots of rolls, loops and other shennanigans. From a flying standpoint, the Stratosurfer as a Twin flies exceptionally well, better I think than with the top mount motor. The power setup I put together for these first flights was certainely powerful enough and amazingly quiet and smooth. With a hard/static mounted Mobius, I saw no jello at any time in the HD recording.

Video


First Flight! - 1 February, 2019



Parting Shot

SSMM01c.JPG
What a great day!



Project 3D Print Files


All prints were were setup with 50%-80% 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
52192sm.JPG  52192  Stratosurfer Twin Motor Mount Body  15.3g/60%  52192.STL  22xx size motor mount
52193sm.JPG  52193  Stratosurfer Twin Motor Mount Front Piece  3.2g/80%  52193.STL  Fits into the mount body, 52192
52194sm.JPG  52194  Stratosurfer Rear Wing Mount  8.2g/50%  52194.STL  Clamping cover for the rear wing mount
52156sm.JPG  52156  Stratosurfer Front Wing Mount  14.5g/50%  52156.STL  Low profile wing mount and cover


See Also


Some of the Vendors I used for this project

ReadyMadeRC
GetFPV
Ready to Fly Quads


Comments? Questions?

email me!