> > Hello Paul,
> >
> > My spelling is terrible, it is Aixro. So far the 300 cc is
> all that is
> > available. The R301 means single rotor. We have been
> discussing a R302
> > engine (twin rotor). The problem is that at 6000 RPM the
> output is not
> > enough for LSA at 70-75 hp. (kart engines run up to 9000 rpm
> to get 48 hp)
> >
> > Discussions are ongoing, with the SAE paper authored by Wankel
> ag et.
> > al. also being reviewed. All ideas are welcome.
> >
> > If turbocompounding were already engineered there would be
> interest. As
> > is, just getting a new engine manufactured is using all
> available assets.
> >
> > Dan
> >
>
> What is the matter with running it up to 9,000 RPM for take off
> and climb out?
>
> All you need is a 3.3:1 gear box. HP is RPM times Torque. The
> more the RPM the
> more the HP. Airplanes fly on HP and not Torque. With gearing
> Torque can be
> almost anything you want it to be. Lets say the engine torque is
> 50 foot pounds
> at 9000 RPM. With a 3.3:1 gear box prop torque would be 165 foot
> pounds at 2700
> RPM. Prop HP is pretty close to being the same.
>
> In the case of the NA Mazda engine Torque is 160 foot pounds.
> With a 2.85:1 gear
> box prop torque is 456 foot pounds. Prop HP is pretty close to
> being the same.
>
> Paul Lamar ...No rotor no motor.

The draw back for the aixro engine in it present configuration...
100hrs TBO.

Marc J.
NexusMustang

That is a drawback for aviation use. No question about it.
What wears out?