Sunday, 16 February 2014

Tricopter - first flight FPV

FPV flying; well its a bit odd flying 'heads down' into a screen... took some tips from FliteTest and didn't try to switch between the screen and looking up :)

The video range is a bit suspect... but I have mounted the video Rx about 20cm from the transmitter!

Linky to youtube video

Sunday, 9 February 2014

Tricopter maiden flight

Flying the tricopter during calm(er) spells on a gusty Sunday.

PIDs still need some tuning to get rid of the shakes, but this is surprisingly fly-able for a scratch build wot I made :) I attribute some of this to the SimonK flashed ESCs

Tuesday, 4 February 2014

Tricopter - electronics install and first (tethered) flight

740g flight weight (with 1800maH battery) just add GoPro and video TX :)
Complete Tricopter
First flight (securely tethered to a heavy table)

Monday, 27 January 2014

Tricopter design and build

This project started as an experiment in tilt-yaw steering (based on the excellent RC Explorer design from David Windestål). The first frame was made from a leftover quadcopter kit plate and aluminium 1/2 inch box section. It was small, cute, but not flyable!

First attempt proved difficult to tune and fly

The second iteration is currently in build, using wooden booms and an undertray battery/camera system to damp out video 'jello'.
Tricopter in plan - motors are 300mm from the centre of thrust

The rear tilt-able prop seemed to create a feedback wobble in the first model, so for this one I'm using a better servo and have mounted the heavy motor in line with the tilt hinge to reduce its moment. This should reduce the amount the tricopter reacts to tilting the rear prop, if I remember some basic mechanics... :o

All-up-weight with 1800mAH battery and video TX/GoPro is going to be around 900-950g. Dry weight without battery or video system should be around 550g. I'm thinking about drilling a few holes in the wooden booms to reduce weight further :D

Tail servo assembly.
Flight control board mounted on foamboard and four cubes of vibration damping foam. Hey, it might work!

Headcrab flying - with FPV!

First test flight with new landing legs, suspended battery/camera tray and FPV system installed.

It was dark, so testing was limited to the area lit by the back porch floodlight!

GPS + baro pressure (height) logging in the Bixler

Google Earth view of three flights - heights are logged from barometric pressure, lat lon from GPS

Platform was the Bixler trainer flown visually (hence lots of unexciting going round in circles!)