The HP VT21 4-stroke RC model plane engine

This is a 30 year-old 4-stroke engine which has an Aspin Rotary Valve in the head rather than more conventional poppet valves and camshaft. These engines are very weak but also amazingly quiet. The airframe is a very old design from the 1960s I think and it weighs a ton. Flying this engine/airframe combination requires a *very* light touch on the sticks because it'll stall in an instant if you attempt to slow it up or use just a fraction too much elevator. Still, it makes a nice change from grossly overpowered trainers, 3D machines and pulsejet-powered RC models.

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A large turboprop-powered Das Ugly Stik RC model airplane
This unique turpoprop powered Ugly Stik was seen at the 2011 ANZAC jet rally in Tokoroa New Zealand. This was only its second flight. Something nicely different to all the other turbine-powered jet models in the sky at that event.





15CC 4 stroke RC engine: gas,not nitro!
This engine powers a speed boat : http://www.youtube.com/watch?v=wqWPeP3qZdo MORE MODEL ENGINES : http://www.youtube.com/user/rapmoz/videos?view=0 GANNET engine V12 v8 silnik OS max vintage outboard toys nitro westbury CC Moteur modele reduit model engine run glow plug speedboat os enya diesel rc mccoy westbury motor 2 4 stroke cycle saito super tigre cmb rossi taplin charlton ed dc frog hand made compression ignition spark ops cox hpi evinrude mercury kyosho tamiya graupner hirtenberger hb taifun fuji toy inboard kb k&b wen mac allyn fuel gas amps robbe tether car onboard starter start fema temps homemade vintage smallest world hit & miss wankel rotary supercharged turbine jet plane rc r/c boat tractor steam engine brushless powered antique old modellmotor marine water cooled pulsejet lego miniature mini micro small hotrod twin ohv dohc ohc petrol ether castor oil heli helicopter seaplane truck chevy buggy airplane corvette Aircraft avion aereo nave free flight u control





Kalt .45 4 Stroke Engine is Antique. Let's run it.
One of the first 4 Strokes to hit the market in the early '80s was this Kalt .45. It was manufactured by Kalt Sangyo of Tokyo, Japan and was one of my most reliable and greatest flying engines for my planes. It needed no muffler and used no or low nitro content fuel to run. I decided to run it for all of you to see and here. Thanks for watching.





HP 21 VT Flat Twin - Testlauf
Two Vintage HP 21 VT was buildt together by myself. The new Twin is not for regular flying. Engines of today hav much more power. Enginedatas: 7 ccm, with 11x7 Master Airscrew - 8.000 Upm, with Graupner 10x6 - 10.000 Upm.




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