Those mufflers usually have fibreglass packing which is the sound absorbing material. The oil residue in the exhaust gas contaminates the fibreglass pretty quickly and it loses its ability to muffle the noise, in which case it is only adding additional weight. The fibreglass packing needs to replace...

So how well does it autorotate?
Oh, it can't autorotate? That's a shame as it's an FAA requirement to be able to autorotate.
Oh, it's electric is it? What is its range? Gosh, only 20 min endurance.

Learjet

The xenon strobes are the most common type.
The xenon strobes produce a huge amount of light compared to any other light source. It's not easy to replace them with LED's that produce the same instantaneous light output.

Learjet

Are you sure the conventional strobe you refer to isn't a xenon strobe and not a filament?

Ger

John If the head was skimmed unnecessarily then the engine may be detonating at max output. This can raise engine temps very quickly. In fact generally so quickly that you melt a piston. A quick test is to run 98 octane fuel for a flight and see if the problem disappears. If the ignition timing has ...

Soekiwindi
Was the head skimmed when the rebuild was done?
Has the ignition timing been set correctly since the rebuild?

3 legged resistor? What's that?

Hi all As far as I know all modern cars address this issue in the following manner. When the ignition switch is switched to the "on" position the high pressure fuel pump switches on for a fixed amount of time (about 5 seconds) and then switches off. The driver then starts the car and the engine ECU ...

Jammer. Ek kan net Engels mooi praat! What may be happening is that the knock sensor on the engine is retarding the ignition timing slightly to prevent detonation when using 93 octane fuel. This will reduce the output power of the engine slightly but protect it from detonation. The solution of coars...

Dear Duck

Have you ensured that there is no air trapped in the block? With some engines there is a procedure that one must follow to get all the air out. This sometimes involves opening an air bleed screw until water comes out etc. Not knowing the engine I can't comment further. Best of luck.

Thank you for the warm welcome Another problem that I have discovered is that most helicopter rotor blades are designed for relatively low altitude (ie High air density) operation. This is where they are used most of the time. On the highveld with the high density altitude the blades are past their ...

Learjet A similar thing happens with helicopters. It's called overpitching. It's a well known phenomenon, particularly with smaller helicopters. It goes something like this: 1. Helicopter is over MAUW. (1st mistake) 2. Density altitude is quite high. 3. Pilot is not that experianced, particularly wi...