Bill, I checked my rad to see if it would fit in the
new configuration. Looks tight but I think it will
fit with no cowl modifications other than loping off
the hump on the bottom of the cowl which I was going to do anyway.

turbo and the intercooler with a push pull rod going straight

back

to the instrumental panel. The rad setup shown will be redone.

Paul Lamar

IMHO a major breakthrough in aircraft engine motor mounts.

Paul Lamar

Paul,

What are the dimensions on the firewall where the mount supports bolt to

on

this picture?
How much weight does the rear bracket carry.  Will have to beef up my
firewall at that point, need to know how much.

Barny 20bt  MGDQ

That is a Kis Cruiser and it is composite. The firewall is 1/2 inch (I

think)

plywood with glass on both sides. Four or five layers of 10 oz as I

recall.

Vance engineered it so he would now. The rear mount has about 50 pounds
max static on it and about 300 pounds in a six G turn or a hard landing

drop in.

While the airplane is climbing and the prop thrust is a max the load on

the

rear mount goes to near zero.

As I recall you have a metal Murphy so beef it up like this Questair

Venture

picture with a steel hat section. The Questair has a very short link but

the

link can be of any length. Mine goes from the oil pan to the top of the

firewall.

Paul Lamar

Thanx for the info on how to beef up the rear bracket.

How far apart are the supports where they bolt to the firewall?  Trying to
get an idea of how far apart they are.  While there is alot of clearance on
the supports to turbo on a   13b, a longer engine like the 20b  would have
less clearance on the turbo.  Trying to get an idea on how far apart they
would have to clear.  If my supports are too close where they bolt to the
engine, my engine supports would go through or too close to  the turbo and
not make this an option for me.

An example is the super rebel firewall.  The motor mounts are 30" apart on
the horizontal, 23 5/8 " vertical .  I have lots of room under the firewall
(good for radiators) and not much above it( water pump in way syndrome).  No
offset for the engine mount.

Barny 20bt MGDQ

You are confusing me a bit Barny. If the plans call for 30 inches apart
apparently the firewall is beefed in that area to take the motor mount
loads. Are you using a TO4. I have drawings on the TO4 but I don't have any
on the manifold you plan to use with the TO4. I will do a 3D for you if
you can come up with the dimensions on the manifold. I will also need
a sketch of where the thrust line is relative to the hard points on the
firewall.


Paul Lamar
 
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