FTFC20 - KK invader

[bracesport]

@rockyboy - I love this RC conversion of the KK Invader with Pitcherons - to meet your specifications I would need to make this powered - seems doable!

 

[bracesport]

reserved 1

 

[bracesport]

reserved 2

 

[rockyboy]

This is a beautiful plane! I know the challenge specs call for using an FT power pack, but it's just a couple points in the scoring if you choose to build her as an unpowered glider. But it would be even more awesome if you had a removable power pod that would convert it back to a pure glider...

But seriously, don't mind me here - just make something you'll love and we'll all cheer for it!

 

[bracesport]

@rockyboy - It is something to ponder - how to build and how to power it - I have to research the FT power options!

 

[daxian]

lol ....i built that one from a kit back in the seventies...tissue/dope covered !! was a fun flier ,even as a free flight ...did not last too long though. rc was out of my reach in those days .

 

[bracesport]

I have been tinkering with Flyboa on the DLG which is focused on weight out - this will be a challenge along those lines!

 

[bracesport]

I got a bit sidetracked with another project (the ridge rat inspired by thenated0g), but the CAD is out of the way, so now to convert the Invader to 3D. I definitely will use the DLG wing technique for all wing surfaces, but this time minus the outer paper - a la @TooJung2Die!

 

[TooJung2Die]

I'll be watching this. Are you going to include rudders or make it bank-n-yank? I have another balsa old-timer kit with the same tail as the Invader. I've been delaying the build because I haven't sorted out in my mind how to control the dual rudders. I think you can make just one active rudder and leave the other fixed. Woodward's Invader has fixed tail surfaces and uses the pitcheron (wingeron?) wing for all control.

 

[bracesport]

@TooJung2Die - I am going pitcherons!

 

[bracesport]

getting started - 1.2m wing (120% original size).

 

[Matagami Designs]

getting started - 1.2m wing (120% original size).

View attachment 140491

I see you are using onshape for your CAD. 👍This method looks just like what I'm doing for the Bellanca Aircruiser, although In SolidWorks.

BTW what is a pitcheron?

 

[bracesport]

@Matagami Designs - yes I have been a pro onshape user for two and a half years (highly recommend it being an ex SW user for 12 yrs) - the wings function like elevons (the wing halves rotate together or independently) - see the beginning of the video pitcherons

 

[Matagami Designs]

Wow that is impressive. I kind of figured that is what was happening. Never seen that before. I'm assuming there is no full scale applications of this in real life? Are there advantages in this for slope soaring?

 

[bracesport]

@Matagami Designs - you tell me?

 

[Matagami Designs]

@Matagami Designs - you tell me?

So it seems the advantage would be some hilariously awesome flat spins.

 

[bracesport]

OK, it is done - the main wing and tail are prepared for lamination shaping - I will be using the same method used on my DLG wing!

 

[bracesport]

now to design the pitcheron system!

 

[OliverW]

OK, it is done - the main wing and tail are prepared for lamination shaping - I will be using the same method used on my DLG wing!

View attachment 140604 View attachment 140605 View attachment 140606

It is beautiful! Great work!

 

[bracesport]

I think the simple way to make the pitcherons is to have an axle built into the base wing section and tubes inserted into the wings - a simple pin at each end will secure the wings onto the axle - depending on the total weight of the ship the length of the axle can be assessed.