WOW,,, what a heli ,,, she just got better!!!!!

[Tom Fiddler]

(I promise to wash my hands first )

LOL your to much Jim!!
Like i said glad you got her flying better

[rstacy]

Ray, Al, I'm actually starting to like you guys !!, I will take your names off my RR ignore list,


Aw Jim. I dont know what to say. :oops:

[Jeff H]

, I was simply cheering for my side !!


Glad to see you finally admit it Jim :lol:

Ray how is the little hawk flying for you?

[rstacy]

[quote]Ray how is the little hawk flying for you?

Not as well as I would like.
I liked how it went together.
The head looks like an older miniature Xcell head.

The wire drive for the tail sucks big time.
It had serious wind up problems.
I was pretty certain that this would be a problem but many RR whiffle ball simulator pilots assured me that it wouldn't be a problem.
Well it is.
I did the SteveH upgrade to .093 drive wire and it did get better but it still not right. I didn't have a chance to work with it this weekend.
It also sounds like I received one of the clutch bells that didn't have the liner glued in properly. I may need to drop the motor and fix that.
I have to keep reminding myself that I only paid $159.00 for this machine.
The tail rotor servo and gyro cost more that the helicopter!
Tom F thinks that may be the problem. I need to go find a Fu Taba 153 gyro for this heli!

[ThBrtmn]

The tail rotor servo and gyro cost more that the helicopter!

LOL...I never thought of it that way... :D

[Jeff H]

Tom F thinks that may be the problem. I need to go find a Fu Taba 153 gyro for this heli!


I've got a 701 Telebee in the basement, and a FMA servo that I'll trade you. That way, you won't have that much $ tied up in it for that fateful day. :D

[the Wasp]

Ray, try wheel bearing grease on the wire...



Jim

[Jeff H]

exactly how does grease help with a flexibility problem?

Ray, Torque tube

[the Wasp]

I don't believe the wire drive needs to flex !!, I used wheel bearing grease on mine and I never had a problem with the drive wire twisting, I use-to piro my Hawk so fast I was told I was going to brake something "but never did"...


Jim

[rstacy]

It isnt the pirouette rate that suffers.
It is the holding power that causes wind up.
Turn the gain up enough to get decent holding power and the tail will start whipping back and forth in an oscillating manor. The sound will be like a rubber band being stretched. The longer you let it go, the worse it gets.

I could get the wind up to stop by turning the gain down but then the gyro performance would be horrible.

[ThBrtmn]

Ray...all I have is my experience with my Hawk and others around me...
...So you are saying that you are getting a wag in the tail? Is it during manuevers or hovering? Is it possible that it is the type of gyro or servo?
With mine and others around me, I havent ever heard the rubber band noise you speak of. One guy had a telebee once but got the 401 combo... thats what we were all flying on ours...I wish you could have flown mine before I put the TT in it.

[rstacy]

I suppose anything is possible. This combo has worked in other helis.
The rubber band sound is a combination of the pitch and RPM of the tail rotor changing as it tries to keep with the demands of the gyro.
I havent had a chance to work with it much since changing the drive wire.
I hope to play with it this week.

[the Wasp]

""The sound will be like a rubber band being stretched"",,, yes, yes, I did have this (and the wag) with my Hawk SEv2 wire drive with the 401 & S9253 !!

"oldfart" told me to use a longer servo arm and set the ball at the end of servo arm and turn down my sensitivity on the Tx, after I did this I never had that problem again,,,

oldfart called it GIO "Gyro Induced Oscillation"


when rebuilding after a crashed I saw NO sign of the wire twisting...


Jim

[rstacy]

Jim,

Thanks for the input.
That is exactly what I am running into.
And as you have found out, doing the things Phil suggested will settle it down.
The problem is that the gyro will no longer hold as well as it should or could.

[Jeff H]

Jim and Bart,
do a blinding 540 and try to have the tail stop on a dime. It will overshoot every time. That is wind-up, any demanding tail manuver is almost impossible with a wire tail.

Try full speed backwards flight or forwards for that matter, then do a pyro. Notice how the pyro speed is very inconsistant... that is the wind-up.

[ThBrtmn]

do a blinding 540 and try to have the tail stop on a dime. It will overshoot every time.

Not with my TT in :D
The rubber band sound is a combination of the pitch and RPM of the tail rotor changing as it tries to keep with the demands of the gyro.

Your not talking about the sound of the gears right..? That is one thing about the hawk... Those gears make it loud.

[Tom Fiddler]

Jim and Bart,
do a blinding 540 and try to have the tail stop on a dime. It will overshoot every time. That is wind-up, any demanding tail manuver is almost impossible with a wire tail.

Try full speed backwards flight or forwards for that matter, then do a pyro. Notice how the pyro speed is very inconsistant... that is the wind-up.

Jeff your whole post missses the point that the Hawk sport is a beginners heli. The wire drive tail is there for one reason ....it's cheap, to build and to crash.
A blinding 540 and full speed backwards flight are not in the newbies moves.
If the wire drive winds up you must use a slower servo ,less gyro gain to compensate.
No the tail won't hold like a Fury's why would you think it should?
Most people who have mastered hovering will upgrade to the carbon drive. Just like better fliers use better servos , gyro's, blades and radios

I may be wrong but it seems you and Ray want this thing to fly like your high end heli's, Not going to happen, why should it?

It may not fly as well as a high end heli but it will teach a newbie the basics, and what more could you want for $159

[ThBrtmn]

Go Scale! :glasses2:

[the Wasp]

Tom,,, another thing about the Hawk Sport, is a lot of guys fly it as a novelty, they simply want to fly it because it is a $160 heli, much like owning a MG Midget just because it's a small and unusual car...



Jim

[the Wasp]

so the other day I turned down some hard red Raptor head dampeners and installed them on my Falcon, she just got better !!


Jim

[WillJames]

Interesting Jim!! :D

[the Wasp]

yea,,, I hear'd guys are cutting down Raptor head dampeners and mounting them on their Century's 30s & 50s, so I had to do it too,,, I ordered the red and the blue dampeners and I can say the red's are quite a lot harder than the stock Century's dampeners, but the red Raptor dampeners are what you need for sure !! they really need to be cut-down on a lathe (use a very sharp cutter) to get them right, I don't see how someone can cut them down by hand with a hobby knife and get them right or get them each the same size,,,

how do they work ?,,, I have heard guys tell on-lookers that learning to fly a RC heli is like learning to balance a ball on the end of a stick, well with the red dampeners the stick's diameter just got smaller,,, although I added 5% more Expo on my cyclic's servos my cyclic became more responsive yet at the same time the heli felt as if it tracked better and felt more crisp yet more solid too, (you know how good carbon blades "over wood blades" makes your heli feel more solid in the air yet quicker on the cyclic at the same time), it felt as if I didn't need to finesse the cyclic stick as much to get it to do what I wanted it to do, yet at the same time she felt more solid and clean, I only got 2 flights in but I am sold and I will never go back to the stock dampeners, I will have to get some more red dampeners and get them turned down for the future,,, now I have to fly her on the high (expo) rates oo-yea,,,

go forth and do it to it guys !!


Jim

[ThBrtmn]

Cool Jim...
When I run out of my softy Century Dampners...I might have you turn down a set for me...
Keep us posted on the durablity of them...I would like to see how long they last.

[the Wasp]

you got it ThBartmn.


Jim