Recent Posts

31

Double Seaters / Re: Drawing Confusion

« Last post by SmallCar on August 05, 2025, 02:09:13 PM »

Never mind!  Excuse the ring.  I think I've figured out a plan based on looking at several pictures posted by other builders.  If I picked it wrong...I'll live with it.

32

Brock's bits - LEXLV3 / Re: Fuselage (controls)

« Last post by Brock on August 04, 2025, 07:28:55 PM »

Torque tube .... Check
Control Stick .... Check

Feels good to have these done.  BTW - there is a measurement error on my knapkin drawing.  That 3"s is from the single hole (center) to the middle hole.  Not the second hole on top as drawn.  The 3" location was chosen as it would put the cable close to parallel to the torque tube (based on the pulley and it's location).  Just for looks.
I chose 3.75" for the pivot point as I was trying (for no reason in particular) to get the fwd stick angle to equal the aft stick angle.  In reality I doubt the stick will ever need to move very far, just a guess.

33

Single Seaters / Re: Over Banking in turn

« Last post by Tom H on August 04, 2025, 06:10:43 AM »

Thanks Tom.  I did see an old thread someplace where those (or like them) were made at 10 degrees.  So, as I understand it, differential ailerons is more about adjusting out adverse yaw.  Did it eliminate the overbanking as well?

DE Stubby does not seem to overbank, but I don't know if the bellcrank mod had this effect - we never used the plan's version.  Unless the air is completely still, these airplanes respond to air currents, turbulence, so flight corrections are often required.

34

Single Seaters / Re: Over Banking in turn

« Last post by Chuck in Indiana on August 03, 2025, 06:50:48 AM »

Thanks, Tom.. ahh, no thinking. My kind of job. 

35

Single Seaters / Re: Over Banking in turn

« Last post by Brock on August 03, 2025, 06:37:50 AM »

Thanks Tom.  I did see an old thread someplace where those (or like them) were made at 10 degrees.  So, as I understand it, differential ailerons is more about adjusting out adverse yaw.  Did it eliminate the overbanking as well?

36

Single Seaters / Re: Over Banking in turn

« Last post by Tom H on August 03, 2025, 05:49:36 AM »

Here are pics of the aileron bellcrank on DE Stubby.  LEU Treehugger has similar.  You should be able to estimate the angles.

37

Single Seaters / Re: Over Banking in turn

« Last post by jrbirdman47 on August 03, 2025, 04:53:00 AM »

Thinking weakens the team........

38

3 cylinder Radial / ring gear

« Last post by Chuck in Indiana on August 03, 2025, 04:43:37 AM »

Here's an ongoing issue. The starter pinion is unsupported outboard, and *mine* has a fair amount of slop when extended. It apparently climbed on top of the ring gear, trashed that, and broke the starter casting. Kamil Verner sent me an unfinished ring gear and a .dxf file as a replacement. That is the black one on the left that I have about 40 hours on.

If you look closely, many of the teeth are bent, and there are a couple of places where it is damaged badly.
So. I made a new one out of 4130, thinking I could heat treat it. Bad idea.  The heat treat guy was afraid it would warp, and I should have made it out of an air hardening tool steel. I'll do that on the next one if needed.
This time, I set it up by taking up the slop in the pinion shaft when measuring.

Time will tell.
Question.. is this slop in the pinion shaft "normal" or do I just have a bad pinion assembly?

39

Single Seaters / Re: Over Banking in turn

« Last post by Chuck in Indiana on August 03, 2025, 04:27:51 AM »

We set up DE Stubby and LEU Treehugger to have differential aileron movement by modifying the aileron bellcranks.  Seems to work well.

Ooh, I would be into that. Do you have dimensions? Picture?  I'd hate to have to think..

40

Brock's bits - LEXLV3 / Re: Fuselage

« Last post by pappyadkins on August 02, 2025, 05:15:35 PM »

Looks great....