Yes a two rotor direct drive with hp between 80 and 120.  For a CH701 or another stol aircraft.  This is the engine I'm looking for.  I know of one person (cant remember his name) who built one using a 12A.

 

Marc J.

----- Message d'origine -----
De: Tracy Crook <tracy@rotaryaviation.com>
Date: Dimanche, Mars 9, 2008 11:30 am
Objet: [FlyRotary] Re: Anyone have an RD-1C for sale?
À: Rotary motors in aircraft <flyrotary@lancaironline.net>

> Damn Rusty, I'd give anything for your organizational skills and
> work habits
> but darned if I can figure out your masochistic (sp?)
> tendencies on this
> plane :>) One Rotor????
>
> Sure, that can work but why not something completely
> different? I want
> to see someone do a direct drive 2 rotor (maybe even turboed) in
> the right
> application and the RV-3 comes close. That would be Kool!
>
> I know, everyone has their own idea of what's cool. Kick ass on
> whateveryou decide to do Rusty.
>
> Tracy (making carbon fiber parts)
>
>
>
> On Sun, Mar 9, 2008 at 1:04 AM, Russell Duffy
> wrote:
>
> > Good one mate, I knew you couldn't let it go.
> >
> > Hi George,
> >
> > Well that certainly IS the problem. I was all set to bolt a
> Lycoming> on the RV-3, but I realize that what I need is a
> project, not a plane.
> > Since there's no doubt a single will work for an RV-3, there's
> really no
> > reason not to do it.
> >
> > While it may seem wishy washy to go back to the RD-1C, the
> damper on the
> > Autoflight drive didn't magically fix the resonance problem,
> and the RV-3
> > has changed the power requirements. For previous aircraft, I
> was only
> > planning to have about 80 HP, and that would fall within the
> 6000 rpm limit
> > of the Autoflight drive. Now that I can use as much power as
> I can make, I
> > need more RPM.
> >
> > The offset thrust line of the Autoflight drive would have
> worked well for
> > the previous aircraft I was considering, but not so well for
> the RV cowl.
> > The mount plate on Tracy's drive is also really handy for mounting
> > coolers for the RV cowl inlets.
> >
> > The Autoflight drive is about 12 lbs lighter IIRC, but I have
> the opposite
> > problem with weight now. A single made from stock housings is way
> > overweight compared to 912S, but compared to an O-200 or O-
> 235, it's just
> > fine. Using stock housings will just limit you to aircraft
> that were
> > designed for 100-125 HP LyConts.
> >
> > Finally, I really like the carbon fiber ground adjustable prop that
> > Sensenich makes, and the RD-1C rotates the proper direction to
> use it.
> >
> > I should probably be more concerned with building the plane
> for now, but I
> > can't help but think of engine stuff. I've got a partial
> mount on order
> > from the guys who make Van's mounts. I don't know if I'll try
> to make a
> > beam style mount, or use a sandwich plate similar to the old
> CCI mount.
> > Either way, I'll size it to fit either the single rotor, or a
> two rotor as a
> > fall back plan.
> >
> > Enough babbling for now.
> >
> > Rusty (watching the salt magically melt snow)
> >
> >
> >
> >
>