flyrotary@lancaironline.net Mailing List Archive

Rumor has it that running on one rotor (on a 2 rotor engine) can be very hazardous to the health of most things attached to the engine.

You can treat it like a turbine; always feed the motor from the same tank, and use a transfer pump to move fuel from aux to main.

But...Didn't you mention 6psi fuel pressure? If that's correct, then why have a return line at all? If it's a carb engine, just use Facet 'solid state' (interrupter style) pumps. No return line needed.

Charlie

On 10/30/2014 3:51 PM, Ernest Christley wrote:

I'm forwarding this to the list, since some might find it interesting.

On Wednesday, October 29, 2014 10:02 AM, John Papson <jpapson@digitalgridinc.com> wrote:

Ernest:

I sending this direct to you because while I enjoy reading the FLYROTARY mail list , I’m not registered.

Why not completely eliminate the dual (supply and return) fuel valve ?

Assuming fuel injection:

Run one rotor off of one tank, with its own pump and return line, and the other rotor off the second tank with its own pump and return.

Or in the case of a 4 cylinder engine, one pair opposed cylinders from one tank and the other pair from the other.

If you lose one half, the engine would have to run wide open throttle (WOT), and make a little less than half power.

With WOT, the pumping losses from the dead half of the engine will be minimal, like the braking of a diesel or 2-stroke engine.

Enough power to at least “extend your glide”, and maybe enough to maintain altitude in some cases.

regards

John C Papson

Director of Product Development

DigitalGrid Inc

201 Moreland Rd

Hauppauge NY

11788

Phone: (631) 271-7092 ex 127

FAX: (631) 271-7097

Email: jpapson@digitalgridinc.com

P.S OK to copy to the FLYROTARY list if you deem this worthwhile.