How to make a propeller driven aircraft go really fast ?
- Thread starter Speedboat100
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rv6ejguy
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A lot of work thought and work went into that but no way it would cool with that setup. A lot of things to prove flight worthy here...
Dan Thomas
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WW2 warbirds had problems with it. Some had to limit the initial takeoff power until they had enough airspeed to control the roll.
They probably need a bunch of right rudder, but I doubt it's worth going contra-rotation. One Reno racer had contra-rotation, I don't remember if it was worth it. The short blades and hub drag on that look terrible to me.
Speedboat100
Well-Known Member
I wonder if the Falck's Rivets could be tuned into a faster craft ?
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TFF
Well-Known Member
Rivets would be cool, but if you update to be the fastest, it would morph into the fastest looking ones today.
Speedboat100
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There have been 3. Red Baron, Precious Metal and Miss Ashley II.
I read about Critical Mass having trouble as originally built where it didn't have enough rudder to use full power on takeoff. Somebody designed a new fin/rudder and it solved the problem.
Roll control is not generally a problem. Rare Bear has tiny ailerons.
I looked up Precious Metal record on wiki and didn't see any gold wins.
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You're right. I don't think it achieved its full potential before it was destroyed in a fire.
henryk
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Speedboat100
Well-Known Member
I think the counterrotating prop comes to play when you no longer can extend the pro size and their amount.
Take a look at the Italian Macchi-Castoldi M.C. 72 which set a world's speed record of 440 Mph in 1934 - a record that still stands today for piston-engined seaplanes. Contra-rotating props solved the problem of excessive torque.
Speedboat100
Well-Known Member
Take a look at the Italian Macchi-Castoldi M.C. 72 which set a world's speed record of 440 Mph in 1934 - a record that still stands today for piston-engined seaplanes. Contra-rotating props solved the problem of excessive torque.
Threy had two engines in line...so easiest was to use contras. It has some help to torque too.
rv6ejguy
Well-Known Member
The Macchi has always impressed me. What a tremendous accomplishment in the mid '30s!Take a look at the Italian Macchi-Castoldi M.C. 72 which set a world's speed record of 440 Mph in 1934 - a record that still stands today for piston-engined seaplanes. Contra-rotating props solved the problem of excessive torque.
Speedboat100
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I agree you cannot....or you can, but it does not hold water.
Pedalling would bring around 2-5% more power to a light system and solar power 10% of the needed energy to fly efficiently.....or rather practically.
You still need the 85% from the batteries ( or other system ).
If you fly solar and pedal power alone you are restricted to speeds of 30-50 km/h ( faster at high 80-100 km/h even ).
Pedalling would bring around 2-5% more power to a light system and solar power 10% of the needed energy to fly efficiently.....or rather practically.
You still need the 85% from the batteries ( or other system ).
If you fly solar and pedal power alone you are restricted to speeds of 30-50 km/h ( faster at high 80-100 km/h even ).
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poormansairforce
Well-Known Member
How did you manage to get soooo far off topic on your own thread???
