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[rebel-builders] Rebel - Should you move your firewall back

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Keith Leitch

[rebel-builders] Rebel - Should you move your firewall back 3"? A let

Post by Keith Leitch » Sun Feb 19, 2012 11:38 am

Bob,

Sell it after all this work! Are you NUTS!! LOL

After reading everything Daryl and you have writen,
and all the thinking I have been doing lately, I
imagine I will be using the Rotax when it gets to that
point. But I have changed my mind before! :) Plus I
have a couple of cores available..an 0-235L2C and an
0-320D2J. Plus I have that wrecked Rebel with the
Subaru engine. Decisions...decisions.

Keith


--- Bob Patterson <beep@sympatico.ca> wrote:
Thanks Darryl !

And thanks, Mike ! This well-reasoned and
thoughtful, detailed
analysis of the physics involved will now be in the
archives for all
to refer to when making those big choices. I hope
everyone will
read it through and think about all the aspects at
that point.

One of the great things about the Rebel is that
you can just
go ahead and build it - you don't have to decide on
an engine
until you get right up to the front end ! At that
point, you do
have to decide on the kind of flying you are going
to do - and
pick the engine you think will best suit your needs.

For me, the standard Rebel, with a 912-S, will
do everything
I need in the flying department. I hope that will
be my next Rebel.
I currently fly an O-320 Rebel with the firewall not
cut back,
and the empty C of G is 8.1" - very far forward. It
stalls significantly
faster than I would like when solo.... and would
likely cruise faster
with a further aft C of G. Fortunately, I usually
travel with a LOT
of baggage, giving a more rearward C of G, which
makes the flying
quality pleasant for my needs. As Darryl says,
even if you don't
make the best choices, the Rebel is still a LOT
nicer to fly than
production airplanes ! :-)

The choice becomes especially difficult for
those who want
an O-320 now, but also want to go to a Rotax 912
later, if they
have medical problems. My thoughts are:
everything takes longer
than you figure, gas prices are rising, you can't
register at more
than 1,320 lb. anyway - if you want to go LSA, and
health seldom
improves with age, soooooo, when you get up to
installing the
firewall, just bite the bullet & go with the 912 !!
You will have
a ball flying your Rebel, and save on gas too !!!
:-)
OR - cut it back, put in that honking big engine
& have fun for
a year or 2, and plan to sell it when things get
tough .... :-)

(Anna often reminds me - "There are always 2
choices !") :-)

--
......bobp
http://www.prosumers.ca

http://bpatterson.qhealthbeauty.com

http://apatterson2.qhealthzone.com


-------------------------------orig.-------------------------
On Monday 29 January 2007 20:04, Mike Davis wrote:
I just received the following letter from Darryl
regarding his views on
moving the firewall back 3". He asked that I share
it with all the builders
on the list. I have also posted this letter as a
PDF file in the file
library.
https://mail.dcsol.com/file/area206/let ... arryll.pdf
Mike


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