who know what is it on the mast of Carter copter

[autogyro]

I watched some picutures of cater copter, i found there is stick on the mast.
who know it?

[Resasi]

I am going to take a newbie WAG so please excuse my forwardness. Might it be some form of auto pitch control for the jump T.O.?

I would be most interested what the noise level of the machine is with that Scimitar prop? Any comments from anyone at Mentone who has been watching it demo. Thoughts on the weighted rotor?

I was keen to come but unable. The more I am on the forum the more it whets my appetite towards Gyros, this after years of avoiding anything without fixed wings.

[Leonid]

There is a youtube video on this thread:
http://www.rotaryforum.com/forum/showthread.php?t=13559

You can try to estimate the noise level from it.

CC keep writing for quite a while (look up their web pages) that they have a sort of mechanical/automatic control of the rotor pitch for their "slow rotors".

They obviously keep details for themself because of a patent application going on (I haven't been checking their patents page - they might have put fresh ones there).

It would be interesting to know if the same system is installed on this Demonstrator/Trainer and how it is really done.

Leonid

[JRB549]

Trim spring.

[Timchick]

My guess is either trim spring or pitch lever that changes the rotor pitch for jump t/o.

[SamL]

Very interesting, When you look carfully its hard to see any offset in the head.
We need a closer pics fellers, so plaese get cracking:usa2:

[Resasi]

Sorry Leonid, didn't phrase that too well. I have seen the youtube video and have heard it however I have nothing to compare it with and no experience of other gyros. Was wondering how it compared to other similar size machines?

[Heron]

If it is not the pitch control it could be a rotor brake . . .
Heron

[Alan_Cheatham]

In some pictures it appears to be a spring, in this picture from Mentone it looks to be a rubber bungee with an S hook at one end.

[Jazzenjohn]

As far as the noise level, the jump take-off Carter copter was one of the quietest gyros out there. It had both the intake silencer as well as the after muffler on it. Prop noise was as good as the best gyros there.
All that and a jump take-off with a Rotax 582 !!!

[Resasi]

Thanks Jazzenjohn, noise can be a bit of an issue and I believe that his prop design cuts out quite a bit. That jump take off is quite something, certainly hooked me.

[dvs1]

If it is not a brake for the rotor ,Then I would say it is to pull the rotor head down for display . You know so you don't have to sit there and hold stick forward,this way no one will bump head on blades and the wind can't catch the blades at say a show where the ship maybe on diplay.

[rustynance]

It is nothing more than a mount for the trim spring. It sticks out away from the mast to give it more mechanical advantage. The spring was replaced with a rubber bungee after the spring failed repeatedly during jump takeoffs.

Rusty

[coaster]

Thanks Rusty I just listened to your interview with ANN and found it very interesting. Is it possible that you could go into more detail on the controls how it flies etc. thanks

[C. Beaty]

It is nothing more than a mount for the trim spring. It sticks out away from the mast to give it more mechanical advantage. The spring was replaced with a rubber bungee after the spring failed repeatedly during jump takeoffs.

RustySounds like youall rediscovered why Bensen used pieces of chain to connect trim springs.

A coil spring has an almost infinite number of resonances, one of which is sure to be excited by rotor vibration. The chain made up from folded links of sheet metal has enough friction between links to dampen spring resonances.

[Doug Riley]

The followup question is: what's it doing on the FRONT end of the torque bar?

On a conventional offset gimbal head, the forward pull is supplied by rotor thrust, in an amount that's at a maximum at zero airspeed and decreases as airspeed increases. That much can be replicated by a spring, more or less.

The conventional gimbal head also supplies angle-of-attack (a.k.a. G-load) stability. If the Carter head has so little offset that a spring supplements its forward pull, then the G-load/AOA stability function might be expected to suffer.

If anyone cares. Hell, jump takeoff is cool, and ANY gimbal head provides better feel than a swashplate...

[rustynance]

Actually Doug, it doesn't have any offset at all. Offset gimbal wouldn't be ideal during a 2.5g jump. Jay decided against it thinking it would induce a nose down pitching moment during the jump.
The aircraft remains stable, although I haven't flown it past about 70mph. Although it may not have the degree of G-Load and AOA stability that my Dominator has, it is still statically and dynamically stable.

Rusty

[Resasi]

Rusty, although still in the concept stage would there not be a significant airload on any mini-wings in a jump take-off. The demo version has none and jumps spectacularly but I would imagine that jump performance may well suffer with what would seem to be drag plates sticking out?