12  c

The Rotec/Ellison carb is quite expensive at over $300 as I recall.
If you have a lathe and a mill you can make your own
side draft 2 barrel car using a low cost Holly float bowl.

This is designed to work with a two rotor P-port and slide
throttle.

Here are some 3D's.

A  marine outboard engine has a self contained ignition
system. It does not require a battery or  alternator or voltage regulator.

One or more of these devices that can fail and cause the engine to stop if you
are using an EFI and automotive the ignition. The TTC has given
us trouble for that reason. If the battery gets low the EFI and
the ignition fail to work.

A certified aircraft engine does not need these to parts to keep
running as the magneto is self contained ignition and of course most
use carburetors or mechanical injection.


Paul Lamar

    The Rotec is in the $750.00 dollar range right now.  I just got a quote a couple months back.
    Kay C Caldwell :)


    Wow that is amazing.

    Another advantage of the home made Holley is its low
    profile so it will fit under the cowl.


    I was working with a two barrel Holley
    on my RV4 just before I got involved with the TTC project.

    I cut it down but I would still need a bump on the cowl.
    The intake runners need to be about 18 to 20 inches long to get
    low fuel burn.


    Paul Lamar

Is that your rv4 Paul? I really like that engine mount desing. So if you shorten the intake runner length enough for the carb to clear the cowl lines, you loose efficiency? Would it be possible to shorten the length and change the diameter to get the efficiency back?  Also if your running a turbo is the runner length as critical? Sorry for the 1000 questions.
Thanks, Jacob Sturges


Yep. it is now. Mike Wills  built  and designed the motor mount.
It is kind of tricky getting the motor mount tube inside the exhaust.
I think he did it all by trial and error as those were the days
before Solid Works and Rhino.

The criteria for an aircraft MM is to deal with the prop torque.
Lycoming relies on the crankcase for handling that.

It is about 600 foot pounds.

Since the rotary is not designed for that I recommend using the PSRU
adapter plate to handle that directly.


To get a slide throttle in there you will need a fatter cowl.

Paul Lamar

The Rotary Engine free News Letter. Powered by Linux. If you want off
the list PLEASE let me know and I will remove  you.  ACRE NL web
site. http://www.rotaryeng.net You Tube http://tinyurl.com/beqqxas
Copyright 1998-2017 All world wide rights reserved.