1/4 scale Ka-3

[Fred]

Simple change really
Profile, go from ClarkY to an HQ
Simplify the build

And that's about it. There is nothing wrong with the current plan, it's just me who try to "harmonise" all my builds if you see what I mean.

[mentero]

I was thinking in HQ 3.0/12,  Eppler 201, or Eppler 195  for this wing and 2.5% dihedral with carbon tube main spar.

Best,
Miguel

[Fred]

Yep, the 3/12 is a good choice.

When I updated the 1/3 version from ClarkY to Hq, we saw a slight difference, where the speed increased ( not too good for scale, but good for transitions) and a bit better on thermals and on the slow range. 
Was expecting much more improvement if I am honest, but any improvement, is an improvement

[Fred]

Found some 5mm balsa parts. The ones for the rudders.
I put that in the envelope

[mentero]

Hey, that's nice, thank you. 

Best,
Miguel

[mentero]

Hi,

I have started building the K3. Or at least, I have started the thinking about building. Love the plane and love the plans.

I will use DevWing to get the ribs straight to the cutting machine with a HQ profile.

Am I right measuring dihedral at 3º, wing incidence at zero and tail at -2º ?

Best,
Miguel

 

[mentero]

Hi,

I have never had a glider with a V-tail, and would love to have an idea on the recommended throws for elevator-rudder (elerudder?, ruddervator?, elev-O-ruddermatic ?).

I read on the retroplane forum that ailerons at +30/-15 mm is a good starting point, but no mention that I can find on the tail movements.

Did anybody took some notes (and remember where they are) when he build it, or are you like me ?

Best,
Miguel

 

[mentero]

That's how it goes.