Pixie Mk1 Pterror-Gnat
Posted: 11 Aug 2022, 02:15
Flushed with the succes of my Kraft 7c rest-conversion here:
viewtopic.php?f=27&t=1525&sid=182b97a20 ... 10cf001fad
I've had a go at making a Pixie Mk1 replica to steer my Pterror-Gnat model. Pterror-Gnat is a vintage style, rudder only model that was designed by a club-mate to be powered by one of the Les Saxby 0.13cc Gnat replica engines that I built. It has a wingspan of 21.5" (550mm) and weighs 2.54oz (72g) ready to fly. If you're interested, there's a write-up of my engines in the Jan 2022 edition of AeroModeller magazine.
Video of the Pterror-Gnat and engine showing a trimming flight using a fully proportional radio.
For the Pixie, I used Mike_K's 'Yet another single channel encoder' sketch and excellent instructions found here:
viewtopic.php?f=24&t=609
RF is provided by a Lemonrx DIY transmitter module.
I 3d printed the case on a resin printer using drawings by Mike Kitchen but cannot remember where I found them.
I modified the drawings in OpenSCAD to suit myself. Modifications included making the top/bottom and walls thinner to easier fit the boards and battery, removing the mounts and holes for RF module, adding a battery compartment and changing the on/off switch centres to 15mm. I've added the modified OpenSCAD files to the 3D Files forum here:
viewtopic.php?f=72&t=1561
Pics of the Pixie and Pterror-Gnat below. I have had about a dozen flights using the Pixie and now have it (my brain mostly) pretty much sorted out.
viewtopic.php?f=27&t=1525&sid=182b97a20 ... 10cf001fad
I've had a go at making a Pixie Mk1 replica to steer my Pterror-Gnat model. Pterror-Gnat is a vintage style, rudder only model that was designed by a club-mate to be powered by one of the Les Saxby 0.13cc Gnat replica engines that I built. It has a wingspan of 21.5" (550mm) and weighs 2.54oz (72g) ready to fly. If you're interested, there's a write-up of my engines in the Jan 2022 edition of AeroModeller magazine.
Video of the Pterror-Gnat and engine showing a trimming flight using a fully proportional radio.
For the Pixie, I used Mike_K's 'Yet another single channel encoder' sketch and excellent instructions found here:
viewtopic.php?f=24&t=609
RF is provided by a Lemonrx DIY transmitter module.
I 3d printed the case on a resin printer using drawings by Mike Kitchen but cannot remember where I found them.
I modified the drawings in OpenSCAD to suit myself. Modifications included making the top/bottom and walls thinner to easier fit the boards and battery, removing the mounts and holes for RF module, adding a battery compartment and changing the on/off switch centres to 15mm. I've added the modified OpenSCAD files to the 3D Files forum here:
viewtopic.php?f=72&t=1561
Pics of the Pixie and Pterror-Gnat below. I have had about a dozen flights using the Pixie and now have it (my brain mostly) pretty much sorted out.