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Corvair motor mount

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jboglilaw(at)cox.net
Guest

Posted: Fri Mar 02, 2007 7:40 am Post subject: Corvair motor mount

Wondering whether anyone had the dimensions for a 601xl corvair motor mount.



Thanks in advance



Jason.

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mrcc1234(at)sbcglobal.net
Guest

Posted: Fri Mar 02, 2007 1:37 pm Post subject: Corvair motor mount

Jason and list,



I have kept the following on my computer, but still have a few questions on

the same topic.



If that does not work you can search for "HDS center of thrust/corvair

mount" and that should turn it up.  It is also listed at message number

37025 and was posted on Jan 21, 2006.



Attached per reference is the message that this search will find:



"My 601XL WW mount has the datum about 14-3/8" in front of the firewall and

it cants to the left about 2 or 3 degrees (obviously I haven't tried to

measure the angle very accurately)."



Looking at the plans ... the datum point vertical reference is the upper

longerons intersection with the firewall.  Though different engines seem to

have different offsets from this point.  The Jabiru is 23mm above, the 0-235

is 15 below, the O200 is 10 above.  Though the plans also show the actual

measurement from the firewall referenced back to the upper engine mount bolt

locations which is 15mm above the longeron elevation.



It might be easiest to check the other engine mount drawings for reference,

6-JE-1 or similar, rather than trying to visualize my verbal attempt above.



In plan view the prop flange is centered on the aircrafts centerline and the

offset is built in from there depending on rotation direction of the prop.

On a Corvair engine that is spinning normally counter clockwise from the

pilots perspective, the rear of the engine would be canted to your right.



In a question I had for WW a while back, asking the same thing, he said he

only had a degree or so of angle here and never had any troubles with it.



If any of this post does not ring true than I hope someone with the correct

answers chimes in since this is the direction I will be going in when its

time to build the mount.



I also will be holding off until after my airframe is complete so that my

weight and balance calcs can verify the size of my mount.



Happy Flying to all,

Matt Stecher

Corvair / 601XL Tail



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