# Jean Claude's latest activity

• Jean Claude replied to the thread Gyro Warning System.
John, There is a slight asymmetry between the left crosswind and the right crosswind: The non-uniformity of the induced speed produces a...
• Jean Claude replied to the thread Imagine. Too much HP..
it seems to me you are forgetting two points: 1) it takes a bit of time for the rpm to change with rotor load, due to the rotational...
• Title: The rolling friction of several airplane wheels and tires and the effects of rolling friction on take-off Author: J. W. Wetmore...
• Title: The rolling friction of several airplane wheels and tires and the effects of rolling friction on take-off Author: J. W. Wetmore...
• Jean Claude replied to the thread Imagine. Too much HP..
In this situation, you can still increase the number of blades and so you will have more thrust with more power input
• Mike, The thrust curves obtained by JavaProp are accurate, even if the plane shape of the blades is a little different. But we must at...
• Jean Claude replied to the thread Imagine. Too much HP..
Yes, but this video shows 18 seconds of run before the T.O. The maximum thrust of 145 Hp is clearly not used in this phase.
• Jean Claude replied to the thread Imagine. Too much HP..
More power can always give more thrust. For that it is enough to increase the pitch of the blades (to take into account the additional...
• Mike, Don't worry. It's not the wear of your engine. It's just that the fit of propellers to engines is rarely perfect and I not know...
• It is a pity that the manufacturers do not specify in their flight manual the takeoff procedure in case of a downhill runway (just the...
• As I said, extrapolating too far can be dangerous. Thus 115 hp already gives almost too much forward acceleration with the nominal...
• Where do you get this distance from? Is this an actual measurement on your sloped runway? The shortened take-off distances due to the...
• Yes, 105 -(6.8* 10.3*Cos(45)) = 56 m
• John, I calculated the takeoff run without wind for an ELA 07 S 115HP at 450 kg and a static propeller thrust of 2200 N. I get a...
• In flight, the angle of the disc can reach about 30 degrees, for which the cL of the disk is maximum, Moreover, the thrust of the...