Retractable Undercarriage
You should just use TR thrust ie the yaw pedals to turn rather than the brakes - the inside wheel should be kept turning so it doesn't scrub the tyre.
Not with tight turns, you don't. Just see at how much twist on the boom there is when you put a load of tail rotor thrust on a helicopter that is stationary or slowly moving.
It is far better to stab the inner brake to turn the nosewheel and it will continue quite smoothly. If you have a strong crosswind applying tail rotor can, as somebody found out at Aberdeen, turn the aircraft over.
13,000 hrs. offshore; uncountable passenger pickups and drop offs. I would never taxi a helicopter using only the tail rotor.
It is far better to stab the inner brake to turn the nosewheel and it will continue quite smoothly. If you have a strong crosswind applying tail rotor can, as somebody found out at Aberdeen, turn the aircraft over.
13,000 hrs. offshore; uncountable passenger pickups and drop offs. I would never taxi a helicopter using only the tail rotor.
Join Date: Sep 2003
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Agree with Fareast here.
Taxiing AW139 into the spot, fast walking pace with a turn below 9kts for our ping!, I use pedal with a little toe brake into the turn, seems to work well
Taxiing AW139 into the spot, fast walking pace with a turn below 9kts for our ping!, I use pedal with a little toe brake into the turn, seems to work well
I can see if you have a double-wheeled bogey where each wheel can rotate independently you won't have a problem scrubbing the tyres.
I didn't say put a load of TR thrust on - some sympathy and skill is assumed - if you are causing large bending stresses on the boom you are certainly doing it wrong.
Would you sit and scrub the tyres on your car by applying full lock or would you move forward and then steer? Both work but one has some level of finesse about it.
I didn't say put a load of TR thrust on - some sympathy and skill is assumed - if you are causing large bending stresses on the boom you are certainly doing it wrong.
Would you sit and scrub the tyres on your car by applying full lock or would you move forward and then steer? Both work but one has some level of finesse about it.
You can't get the nosewheel to turn over unless you have forward motion.
In the old days with tailwheel undercarriages, S58/S61, and also the S60 you will not twist the boom but you will scrub the tyres turning it without forward motion.
Some habits are hard to forget. I was taxiing past another helicopter in a crowded pan with a marshaller indicating more than an arms length between tips. I then turned right onto my loading point. In the ops room an incandescent pilot accused me of trying to stuff my tail rotor into his rotor disc. He was ex-Navy and had flown tailwheel helicopters beforehand so he assumed that all tailrotors hit bits of scenery on the outside of a tight turn.
Using a plan diagram of a 332 and dividers I proved to him that turning around the starboard mainwheel the tailrotor's sweep is inside the main rotors.
In the old days with tailwheel undercarriages, S58/S61, and also the S60 you will not twist the boom but you will scrub the tyres turning it without forward motion.
Some habits are hard to forget. I was taxiing past another helicopter in a crowded pan with a marshaller indicating more than an arms length between tips. I then turned right onto my loading point. In the ops room an incandescent pilot accused me of trying to stuff my tail rotor into his rotor disc. He was ex-Navy and had flown tailwheel helicopters beforehand so he assumed that all tailrotors hit bits of scenery on the outside of a tight turn.
Using a plan diagram of a 332 and dividers I proved to him that turning around the starboard mainwheel the tailrotor's sweep is inside the main rotors.
The 365 has a castoring nosewheel and can be put in very tight positions and make tight turns whilst still keeping the inner main wheel turning forwards enough to prevent scrubbing.
If you are braking in a turn then you were possibly going too fast before you turned or have turned downhill/downwind.
If you are braking in a turn then you were possibly going too fast before you turned or have turned downhill/downwind.
