Tail Boom

[karlbamforth]

None of the Fairey designs had torque. They all used tip-jets for rotor power. One early model used the engine to spin up the blades, but only until it was fast enough for the tip-jets to kick in, and that was all before takeoff. The later models used a compressor to feed air to the tip-jets.
The props were only for forward flight.

Hi Dennis,

Props were also used for yaw control. At least thats what the test pilot told me when I chatted with him about it.

Karl.

 

[PW_Plack]

A tail rotor may also have some big advantages over coaxial and interneshed rotors when it comes to manufacturing and maintenance costs, and reliability.

Tail booms which incorporate stabilizer surfaces should also reduce the HP required by the tail rotor when flying with forward airspeed, right?

 

[DennisFetters]

Hi Dennis,

Props were also used for yaw control. At least thats what the test pilot told me when I chatted with him about it.

Karl.

Hi Karl,

That is true, they could adjust pitch differently in one prop than the other, and it would turn the aircraft in a hover, or adjust the desired attitude to compensate for wind. But, adjusting the prop pitch was like any prop, slow and not that precise, but doable.

My point is that it did not take the place of counteracting 20% to 25% of the torque that is created by a main blade under power, because in this case the Fairey had no torque.

Still today, it is more efficient to use a tail rotor and boom, than it is using two transmissions, two rotor heads, two blade systems and two control systems. Which somewhat explains why a helicopter with a boob and tail rotor is about 1/2 the weight and cost to build and maintain than any other type of helicopter.

 

[DennisFetters]

A tail rotor may also have some big advantages over coaxial and interneshed rotors when it comes to manufacturing and maintenance costs, and reliability.

Tail booms which incorporate stabilizer surfaces should also reduce the HP required by the tail rotor when flying with forward airspeed, right?

Absolutely right.

 

[Arnie Madsen]

(2007 thread) .... bump ..... I wanted to watch a Carter jump-gyro video again and found this good one by Ron E in post #19 above

 

[jebthereb]

Backing up.

Backing up.

I would say it is very hard if not impossible to see from the pilot seat, and therefore a possible problem when taking off from tight areas.. Especially for those helicopter guys that back up a bit before turning around.

My instructor dinged me everytime there was even a hint that was nose up in the hover and we were starting to back up. Three reasons no rearview mirrors, tail rotor, could possibly hit the skids and then you have the whole tail rotor thing again.

I am learning about the ins and outs of the helicopter and don't think that the tail bood/rotor configuration is a disadvantage but something that must be trained on and know instinctively.

 

[jebthereb]

dang i got sucked into an old thread.......