Sunday, January 4, 2026

Early motor tech

 


5 comments:

  1. Where the use of castor oil started in aerospace. Those spinners sprayed oil everywhere. Think its why the too only cowling.
    Love the smell of castor oil burning. Had a Yamaha TZ 250 GP race bike, castor oil was specified in the manual, not any other oil under any circumstances, pretty amazing how well that vegetable oil works. Its way hypergolic though, best way to go is only mix up enough fuel and castor you need for track time within a few hours, otherwise it absorbs so much water got to heave it. And hi octane race fuel then was 10-15 bucks a gallon, and Castrol castor oil $8 per quart. But it really works, lot better power too over regular two stroke oil. Bought a new Sthil chain saw, if you bought a full case of their vegetable pre mix oil you get 2 more years on a warranty. It might be a deodorized oil, cause every once in a while the exhaust has that great castor bean smell, its very faint though.

    ReplyDelete
  2. Gnome Monosoupape (single valve) engine. The carburetor fed oil/fuel pre-mix into the crankcase and the intake valve was in the piston. The exhaust valve is almost the entire top of the cylinder. Used in dozens of French & British aircraft models.
    Al_in_Ottawa

    ReplyDelete
  3. were rotary/radial engines all odd numbers of cylinders?

    ReplyDelete
    Replies
    1. Yes. Otherwise, there's severe Vibration Problems at certain (Synchronicity) RPM's.And that Gnome Motor is a "Rotary Radial"; The Engine itself Spins on its Mounts, Prop is bolted to the Case, Crankshaft to the Rear Mount.The Gyroscopic Force developed made for interesting effects on Flight Maneuvers.

      Delete