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Old 06-24-2019, 06:57 PM
WingsOnWheels WingsOnWheels is offline
Join Date: Mar 2009
Location: Plano, TX
Posts: 1,736

Originally Posted by fbrewer View Post

I had another suggestion that I would like your thoughts on.

Add 3/16" to 1/4" spacing between the engine mount and the dynafocal mount.

What are the engineering issues with this, other than a longer moment arm of the motor (nominally 1/4" more forward)?
I dont think that would work since the mounts converge at an angle. Would probably be safer to space out the entire mount from the firewall, but that could cause other issues as well.
Colin P.
RV-6A #20603
Complete 5/10/19
I donate every year on my B-Day (in Dec), but donated early in Sep'19.

Last edited by WingsOnWheels : 06-26-2019 at 07:38 AM.
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Old 06-24-2019, 07:43 PM
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Tdeman Tdeman is offline
Join Date: May 2017
Location: Salem, OR
Posts: 47
Default Screwless Spinner?

Is it the flange on the bulkhead or the web of the bulkhead that's interfering with the cowl?

If it is in fact the flange, and you only need to remove about 3/16" for it to work, you could convert the aft (or both) bulkheads to the "screwless spinner".

Then, you could trim about about 3/16 of the spinner off the back (without worrying about edge distance in the glass), giving you the needed clearance relative to the cowl.

That being said, a screwless spinner may not be any easier than cowling rework, but at least you'll end up with a sleek font end
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Old 06-25-2019, 11:13 AM
rvsxer rvsxer is offline
Join Date: May 2007
Location: Inver Grove Hgts, MN
Posts: 320

Originally Posted by agirard7a View Post
I had a similar problem with my cowl when I converted from a nose wheel to a tail wheel. The engine Mount was shorter which created a tighter space between the spinner and cowl. Vanís allowed me to put spacers between the mount and fire wall. (Aprox 3/16Ē). I also but an 1/8Ē spacer between the prop spacer and the aft spinner plate. Hope this helps. Check in with Vanís to make sure.
I put spacers between the mount and firewall when I converted from a Sensenich FP to a Hartzell. Worked fine.
Mike Hilger
RV-6 N207AM w/G3X, 1,600 hours +
South St. Paul, MN (KSGS)
Manager - Panel Design, SteinAir, Inc.
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Old 06-25-2019, 10:27 PM
fbrewer fbrewer is offline
Join Date: Sep 2017
Location: Leander
Posts: 97


Thanks for the info. You might find this a coincidence, but the RV-6 we are converting is N664SB

It is a small world.

Your suggestion is a good one.
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