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Thanks Al for your input. Do you remember the wall
thickness of the 5/8 tubes by any chance. Also I think I remember that you had
someone make your intake manifold. If that is true could I hire him to make one
for me? If so, what was his name and number?
Robert Bollinger MR722 MUM Fairfield IA 52557 (641)472-7000
ex2068 (641)919-3213 cell rob@mum.edu
----- Original Message -----
Sent: Thursday, August 20, 2009 9:52
PM
Subject: [FlyRotary] Re: Diff Betw Late
Model 13B & Renesis
Robert;
I adapted the
Velocity factory mount for
the Franklin 220 hp for my NA
20B. It uses 5/8” dia. 4130 tube for the mount, and it has proven to be
fine. The additional hp adds a bit of stress, but is small compared to
the jolts of hard landings, and I had a few of those in the early going.
The thrust loads from the prop are likely not going to be more than about 800
lbs.
Of course it is all
dependant on good mount design, but with that anything over ¾” would be
overkill. The mount I have is a ‘bed’ type, which supports the engine
off the front cover and rear housing (see at my web site http://members.cox.net/alg3/airplane.htm;
and take the link to the ‘Rotary
Engine’ at the
left).
Al
G
-----Original
Message-----
From: Rotary
motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Robert Bollinger
Sent: Thursday, August 20, 2009 5:36
PM
To: Rotary motors in
aircraft
Subject: [FlyRotary]
Re: Diff Betw Late Model 13B & Renesis
Does anyone have any suggestions about tubing size for
my 300hp 20B? I have made several mounts for my Ford V6 in my BD4. That has
given me lots of experience making mounts for up to 200hp. But what about
300hp? Any thoughts would be appreciated.
On Tue, Aug 18, 2009 at
10:44 AM, Rob <rob@mum.edu>
wrote:
I'm about to begin building my
engine mount for my 20B on my BD4. I'm using a bed mounting plate like Tracys
mount. What size 4130 tubing does everyone recoment that I use? I have a lot
of 3/4x.049 tubing in stock. Would that be ok or should I use something larger
diameter? Any suggestions?
Robert Bollinger
MR722
MUM
Fairfield IA 52557
(641)472-7000 ex2068
(641)919-3213 cell
rob@mum.edu
----- Original Message -----
Sent: Sunday,
August 16, 2009 10:38 PM
Subject:
[FlyRotary] Re: Diff Betw Late Model 13B &
Renesis
Yep! that's what I've heard as
well.
George,
The side seal
tolerances are many times greater than the traditional seals. Plus
they have a “keystone” shape to them. I have heard that many racers
use the longer seals in an attempt to close that gap.
Bryan
From:
Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of George
Lendich
Sent: Sunday,
August 16, 2009 5:35 PM
To: Rotary motors in
aircraft
Subject:
[FlyRotary] Re: Diff Betw Late Model 13B &
Renesis
I have spoken to a number of
people about the Renensis and they all tell me that none of the
compression seal sizes( lengths) completely seal against blow-by, hence
the need for the extra O-ring type seal in the rotor sides.
There are a number of lengths
available and it has been suggest to me to use the longest, as at our
usage, as compared to racing, their never going to reach their
maximum length. Their length is governed by the fact that their being
more exposed the exhaust heat, because of the side exhausts. It's my
feeling that that little cut away in the exhaust side ( of the rotor)
makes them even more exposed.
The grooves for
the outer water jackets are in the rotor housings vice the side
housings.
The rotors have
an additional outer ring. Some of the tolerances are not in the
DVD due to the fact that these components are unique to the
Renesis.
I can get those
to you if you decide on the Renesis. Otherwise, pretty much the
same.
Bryan
From:
Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Jeff
Luckey
Sent: Sunday,
August 16, 2009 12:56 PM
To: Rotary motors in
aircraft
Subject:
[FlyRotary] Diff Betw Late Model 13B &
Renesis
I just watched Bruce
Turrentine’s video on how to rebuild a gen 2 13B. (Pretty good
video considering it was done by one guy and a tripod – and the price
was sure right, $30 delivered.)
I’m considering using a
Renesis and was wondering if there are any significant differences or
gotchas between the 2 engines that I need to know
about.
Also, I’ve been looking for
the Shop Manual for a 2004 Renesis/RX-8 and found a couple on
EBay. The actual printed manuals cost anywhere from $100-200, but
there seem to be electronic versions of these manuals available for
<$20. Has anyone used the electronic versions – likes or
dislikes?
Given the choice among
publishers like Haynes, Chilton, or Mazda, which is best? I would tend
to go w/ Mazda but sometimes Japanese manuals can loose something in
translation.
Thanks,
Jeff
Luckey
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