Home-made mini Spitfire

[Daren Cogdon]

So, I've been faffing about building this mini Spitfire out of some spare sheets of 5mm foam.  Wingspan is about 23.5ins, and it's a KFM2 aerofoil.  

 

It'll be 3-channel - elevator, aileron and throttle - but I'm not sure what sort of motor/prop/ESC/battery combo to use.

 

 

[leccyflyer]

For my SEMFF profile Depron models - which are a bit bigger at 28-29" span - I've been using the 20g pole and stator motors from Robotbirds, their 6amp ESC, 450mah 2s1p packs and GWS 8x6" props and that gives good performance and keeps the model below 250g. That's for the simple profiles, whilst for the cruciform models I might go as large as 800mah. You might be able to come down in motor size and battery size to save an extra bit of weight.

[Daren Cogdon]

I was rummaging around in the shed, and I forgot I had these in there - the motor is a Turning 2204-14T, weighing about 30g with the propeller. ESC is a little 10a job, and the battery is a 2s 350mah job.  Useable?

 

I forgot to add that the bare model weighs about 50g.  

[leccyflyer]

I've got a couple of those and by their figures they will easily give good performance for models up to 8oz AUW, so more than enough for your wee Spitfire. I'll be interested to see how you get on with it.

[Daren Cogdon]

Gonna need to learn how to solder plugs on, I guess...!

[leccyflyer]

For the motors I use 2mm gold bullets, male on the motors, female on the ESCs. For these wee models I just keep the JSTs that come with the batteries.

[Daren Cogdon]

Spit bits.

 

Amazing to think that this plane has literally cost me NOTHING to build - all the build materials and electrical bits were just lying around the house!