Rotorblade-cracks, MT03, MTOsport, Calidus

[t-bird]

The flying by Gerry is not outside the envelope of Gyro flying. They are saying a 10 % drop in rotor RPM is outside the envelope this means from 360 RPM to 324 RPM is outside the envelope

Inspection of rotors is not the answer to the cause of the cracking.

These maneuvers should be prohibited in MT’s and Xenon if they lead to blade cracks.

[Gyronaut]

I will switch on the black box in future and download yes, good tip, thanks VT.

As far as going weightless or negative G, the Pilot Operating Habdbook for the MT03 goes as far as saying "Aerobatics and manoeuvres resulting in reduced “g” are prohibited"

In helicopters, (except for the select few aerobatic types) negative G's are prohibited. This unloads the rotor and leads to mast bumping which will snap the mast right off turning the cockpit into a lawn dart. Similarly, I believe the auto-rotational forces that keep us in the air disappear when this happens - so just don't go there - it can/will spoil your day.

[FO Gyro]

T-Bird,

A 10% drop is well withing the envelope. What the UK agent said is that after the rotor RPM had dropped 10%, the pilot in question would roll the gyro heavily, and then allow the gyro to freefall (zero g) in a wing over/Chandelle type manoeuvre. This would then result in the rotor RPM to drop some more, probably by another 10%. He would then pull back hard on the stick, loading a rotor that was in a state of very low RPM.

This isn't a pussy foot manouevre, and I don't think that people realise that it is a radical manoeuvre. Gyro pilot's will know that zero g manoeuvres are to be avoided, therefore it is out of the safe envelope.

[t-bird]

You should not go negative if done correctly

This is not a new way to fly a gyro. It has been done thousands of times before the MT or Xenon were designed.

[M I Claase]

Just as a matter of interest. The flight load factor limits for the RAF as stated in the manual is +3.5 and absolutely none negative.
Steep turns not more than 60 deg and dive not more than 45 deg.Load factors of less than 1G cause a decay in rotor rpm and if sustained
could lead to blade flapping.Rotor rpm less than 280 must be avoided during flight.Never exceed 395 rpm.Normal 1 up 310-325 and
2 up 325 - 350.Blades 30 ft long by 8.5 inch wide. I wonder how this compare to other gyros?

[Vertical Tango]

Quite different. The shorter the blade, the faster it will run for carrying the same weight. Also the angle of attack can vary from machine to machine. The flater the angle, the faster it will run. Some gyros run comfortably at 450 rpm in cruise. The faster though, the more centrifugal forces on the parts that hold it together.

[t-bird]

Eben can correct me if I am wrong.

Raf is using Sportcopter blades.

Sportcoper is the only Gyro that can do LOOPS and BARREL ROLLS.

The blades are pretty good

http://www.sportcopter.com/

[saraf]

HI

RAF does NOT use Sport Copter blades.

RAF blades was designed and manufactured for the RAF and no other gyro.



Regards
Eben Jnr

[t-bird]

Apologies Eben , my mistake

[saraf]

Hi t-bird

Geen probleem

Nee daar is wel raf's wat vlieg met sportcopter blades maar het baie probleme met dit.

Groete
Eben jne