Planes > Scale
Airco DH2
Happy Days:
--- Quote from: "johnfireball" --- Yes Keith dh2 was powered by a 100hp gnome rotary engine
--- End quote ---
They’ve always fascinated me, those Gnome engines. They had no way of regulating how much fuel/air mixture was sucked into the combustion chambers. So they regulated the engine speed by switching the ignition on & off. :shock: You can hear that happening in the You Tube clip.
The problem really became evident when trying to land. If the pilot left the engine switched off for too long the spark plugs would get wet with un-burnt petrol and refuse to spark when the ignition was switched back on. So the engine wouldn’t re-start.
Of course if the pilot left the engine switched on for too long, while trying to land, the plane would have too much airspeed to be able to land!
I’ve often thought how much workload there must have been trying to land a plane with such an engine. Not only would the pilot be having to consider all the normal matters, wings level, airspeed, glide angle, distance from runway, but also having to think about whether he should switch the ignition on for a couple of seconds to clear the cylinders of fuel so that should he need to go round he would be able to start the engine to do so!
And people talk about the “Good old Days!”………. Good riddance I say!! :lol:
Keith
johnfireball:
http://www.youtube.com/watch?v=DEf2GvEBWQI&feature=related
Listen to this Sopwith Pup landing
andrew wallace:
:clap: nice video
sounds like the pup has a bad case of wind :oops: on the landing :lol:
Happy Days:
No Andy, that’s not the sound of the pup.
It’s the sound of the pilot suffering from a bad case of wind while landing :lol:
Frankly I wouldn’t blame him!
K.
johnfireball:
Hi All,
Love this model, I have cut and chopped this kit to make it more scale and am really enjoying the build. Sorting out the wire rigging(there's an awful lot). Control surface cables are ready for connection as per full size ie on the outside. The aileron control was a wire led along the leading edge of lower wing to a pully to turn 90 degrees to lower aileron horn then both ailerons connected at trailing edges by cable and connection from top aileron horn to leading edge of top wing by spring on top wing aileron. Should work ok I'm using fishing trace coated wire for the control wires and painted fishing line for the rigging. I dont like the nose on this kit as I think it's way off scale and may modify it to suit. The model is getting a bit heavy but I have tried some runs in my living room under power and I think she's gonna fly albeit just like the real thing (barely). Just what I'm looking for.
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