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Nov 14, 2010, 06:36 PM
Designer
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Discussion

Viper Recon Quadrocopter Hybrid


In January 2010 I had an idea to build a FPV aircraft and figured a Tri-copter would be the best layout as the front rotors are spread far apart allowing a clear view.

in January I had searched the net and was not able to find anything like this so I thought it was a neat innovation.

I started initial testing of the v-tail towards the end of January as you can see in the YouTube videos. I had the YouTube videos locked as private until today.

I always killed the gears in my yaw servo for one reason or another. so I thought about creating a servoless Tri-copter. which turned out to really be a hybrid of a Quadrocopter.

I'm a Mechanical Designer Engineer so unfortunately I was not able to design and write code to create a "proper" Flight Controller for this
All I was able to do at the time was use standard off the shelf parts and see if could just prove out the V-tail concept. Well as you can see the craft works but seriously needs a proper FC to control it and make it stable enough for FPV use.

I really could use some help from you guys to get a flight controller setup for this platform. I had thought about modifying the Shrediquette FC but I do not know enough about programming to re-do the mixer code.

I had been keeping this project secret but I found I cannot progress and finish it on my own now. I originally intended to use the FMA Co-Pilot but then did not want the environment dependency it required. I really wanted an Accelerometer based auto leveling system.

I designed the chassis before I bought all the electronics gear so really this chassis was too small in my opinion. I used Easton "cammo hunter" arrow shafts for the booms and L.A Heli MaxiR boom clamps and carbon BL motor mounts. The arrow shafts flex a lot and need to be supported to remove the flex. this was purely a POC ( Proof of Concept ) platform.

I intended to scale this up to a much larger size and have removable booms.

anyway here is the Viper Recon prototype that flew with off the shelf parts.

it was very windy in the flight video.

I used a Skookum SK360 for the 2axis gyro and a coaxial mixer and standard gyro for the v-tail.

Let me know what you guys think

Dave
DCC

Viper Recon VTOL Hybrid quad rotor (0 min 56 sec)

Viper Recon Prototype 1st flight (2 min 28 sec)
Last edited by superdave42; Dec 18, 2010 at 08:35 PM.
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Nov 20, 2010, 01:41 PM
Jesus Freak
AtTheCross's Avatar
aside from the cool factor what's the benefits of the v tail design?
Nov 20, 2010, 01:58 PM
Designer
superdave42's Avatar
Quote:
Originally Posted by AtTheCross
aside from the cool factor what's the benefits of the v tail design?
Tri-copter'ish form factor without a servo.
Nov 20, 2010, 02:25 PM
Jesus Freak
AtTheCross's Avatar
very kewl looking for sure
Nov 20, 2010, 02:31 PM
Designer
superdave42's Avatar
Quote:
Originally Posted by AtTheCross
very kewl looking for sure
Thanks man
Nov 20, 2010, 03:23 PM
Addicted to 3DHS and EF
3Daddict's Avatar
I have no experience with this type of r.c., but this thing looks awesome.
Nov 20, 2010, 10:08 PM
Registered User
Daemon's Avatar
Certainly very eye catching and an interesting project, but seems like a lot of work just
to avoid using a sturdy metal gear servo on the tail of a tricopter.

ian
Nov 20, 2010, 10:25 PM
Designer
superdave42's Avatar
Quote:
Originally Posted by Daemon
Certainly very eye catching and an interesting project, but seems like a lot of work just
to avoid using a sturdy metal gear servo on the tail of a tricopter.

ian
Thanks Ian, yeah that thought has crossed my mind a lot. a Servo works great. but then again everyone has a servo.

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