Subject: Lancair IV-P Engine mount
From: Rotary Engine
Date: 10/31/2005, 4:33 PM
To: AA-me



Paul
Attached are several photos of the Lancair IV-P engine mount for the
TCM-550.

The Firewall slopes aft 14.2 deg.
The C-C distance for the upper Firewall attach points is 41"
The C-C distance for the lower Firewall attach points is 14.187 The distance
between the lower firewall attach points and the center firewall mount is
10"

I tried to take all the pictures from the same height, about level with the
engine frame basket. The photos were taken from about 12 feet with as much
telephoto lens as I could get and still get the upper engine mount attach
points for scaling. The engine mount is almost aligned, but may be about 1
degree off the 14.2deg, about 15 deg is what I measured.

Can you do the same thing with Rino as you are doing for the Legacy? I
believe the Lancair ES engine mount is the same setup as the IV-P. By doing
this you will really be a big help to all the IV's and ES guys installing
20B's

Giffen Marr
Lancair IV-P/20B 43%

Sure no problem.
They look usuable except for the first two or three which are kind of dark.
What is the horzontal distance between the upper hard points and the nose of
the cowl?  Is this for a three rotor or two rotor?
I assume for a three rotor but I am guessing. You'll save a bunch of money
over a turbo TIO-550 Cont. Around $40,000 I would guess? :)

One other required dimension is the distance of the thrust line relative to
the upper firewall hard points.

Paul Lamar ...No rotor no motor.

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Paul
I will have to ask Lancair. There is nothing in the documentation that
addresses the thrust line.

I will have to measure the distance to the front of the cowl. Will try and
get that tomorrow.

The engine will be a turbo three rotor 20B engine. Obviously the turbo will
have to be a heavy duty turbo, not what came with the engine.

Giff

Another source would be a drawing on a TIO-550.


Paul Lamar ...No rotor no motor.

The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2005 All world wide rights reserved.