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Oct 08, 2018, 09:05 AM
Storm Runner guy
Slider2732's Avatar
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A Spruce Goose - using 2x mini quad parts


Specs:
All parts used are from 2x JJRC H67 'Santa' quad
8 motors, with differential thrust on 4 of them
2x RX that both bind to the same TX
Own firmware, based on Silverware (multiple controls methods are in the zip attached below)
2ft wingspan
3.1oz AUW

Quite the challenge. There are 8 motors on 2 quadcopters of course, but then how to steer ?
The answer was differential thrust. The inner 2 motors on each side for left/right.
Each RX has the rear motor ports outputting left and right, the front motor ports react only to throttle input.
That would also mean the crossing over of wiring through the fuselage, for 1 of the motors on each side.
Luckily, it all went well and worked first time
The result of 8x 7mm motors on this 3.1oz aircraft is far too much power...she went vertical at WOT when the CG was set too far back
Flying is on the lowest notch, needing to use the ZTT within the code for glide steering. Just about the complete opposite problem that Howard Hughes had with the original.

Build and flight video:
A Spruce Goose - built using 2x quadcopter parts (8 min 26 sec)


Firmware - to convert a JJRC H67 'Santa' or Bwhoop B-03 to the fixed wing toygrade controls of yesteryear.
See the Silverware thread in the mini quads forum for instructions of how to upload.
https://www.dropbox.com/s/qw1kbr5jpeicwys/Styles.zip
There is a ReadMe containing details of each controls method and connections.
Each Style file relates to popular controls methods of the toygrades from circa 2008.
Single/twin motor and rudder, actuator ailerons, differential thrust etc and intended for the stock TX. The gyro is defeated, to better mimic those methods. Control range can be seen in the video above or recent other Blog posts. It's an easy 300ft, with the RX antenna positioned fully away from any motor wiring.
All flights using this firmware are at your own risk, though it has been thoroughly tested...choose a big field in the boonies
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Jan 25, 2019, 04:43 PM
Registered User
Spaaro's Avatar
Just stumbled across your posts on firmware alterations...

Love this!
I'm immediately imagining a Handley Page 0/100 & -400...a Friedrichschaffen or Gotha types...or Felixstowe F2A flying boat.

I'm really interested in learning how to perform these code changes to stock micro-controllers, for drone->RC plane use & toy transmitters.

I suppose I'll have to learn basic Linux first?


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