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Align T-REX 600N 700N > T-REX 600N head speed and problems in wind
 
 
ANDROSKI
Senior Heliman
Location: Bucks UK

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What head speed do you guys and girls run as im having problems with heli bogging down when doing flips and rolls.
Also in the wind today heli was getting really afected and tipping sideways in fast forward flight? (the heli is new to me and i had a raptor 50 before that never suffered from any of this)

Never trust a man with a dodgy beard.
10-18-2009 12:27 AM
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eo19
Heliman
Location: Newberry, FL

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2100 rpm in idle up 2. I'm running an OS 50 hyper with the align pipe.
10-18-2009 12:40 AM
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Gyronut
Elite Veteran
Location: Martinsville In.

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2K for me...

No bogging during cont rolls and flips...

Rick
10-18-2009 12:44 AM
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bmapope
Senior Heliman
Location: TN

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2150 no probs!

The value of a man is shown in how he treats someone he can gain nothing from.
10-18-2009 01:34 AM
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Simmer
Key Veteran
Location: Massachusetts

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maybe collective managment? Your raptor is a different bird. Maybe you have much more collective setup than you had on you raptor?

New engine?, maybe not broken in? or tuned properly?

I run Cool Power 40% (NOT the low smoke flavor)
2150 in ID2 OS50 with Hatori pipe. GV1 gov.

I can slow the RPMs in tic tocs, then I have to manage it to prevent losing head speed too much. Its a balencing act.

It took me a little while to figure I was over inputing too much collective.

Are you using a gov? or curves?

I am running 13.5 + - and 8 deg cyclic.
10-18-2009 03:28 AM
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FlyingHigh450
Elite Veteran
Location: Macomb,Mi

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Quote 
Simmer
maybe collective managment? Your raptor is a different bird. Maybe you have much more collective setup than you had on you raptor?
+1 ,the Trex has more pitch than the old Raptor so if your hard on the collective managment it will bog for sure.If you don't have a gov, your throttle curves could be off or your being too hard on the collective if your running around 13 degrees of pitch.If you do have a gov then turn the pitch curve down to +/- 11 1/2 and see if that helps.

Trex 600N/hyper 50/MP5, Revmax,Spartan DS760/JR DS8900G,3 Align DS610's.
10-18-2009 04:56 AM
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jasnlemons
Veteran
Location: upstate, SC United States

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+1 to flyinhigh450

even 90's with the power will bog down if you use to much collective.

Fly it like you stole it!
10-18-2009 01:18 PM
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TipSpeed
Veteran
Location: Glenside, PA

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My rex is governed at 2150 with the OS 50 and Align pipe. Using Outrage Formula 30%. Running 11, -11 and will sometimes bind doing hard tic tocs close to the ground. It's all about collective management!

-Dave
10-18-2009 04:11 PM
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Against Gravity
Senior Heliman
Location: Pottstown PA

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Paddles

run Heaver paddles, they will help with stability esp in the wind.
10-18-2009 04:35 PM
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ANDROSKI
Senior Heliman
Location: Bucks UK

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Im only using 25% nitro and not really pushing the stick hard

Im flying a t-rex pro with plastic mixing arms and blade holders. So ive kept the head speed down to about 1900. Im not running a gov and am now thinking it may be the fact i made the pitch curv more positive in the middle ie 1/10th of stick movment ether way will hover heli norm or inverted

Never trust a man with a dodgy beard.
10-19-2009 09:10 PM
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Simmer
Key Veteran
Location: Massachusetts

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Softening the pitch curve around hover is not a bad thing. I know a few good pilots who do this intentionally to calm it in middle stick.

We do spend a good deal of time around center so flattening around center can be a good thing to make it less jumpy.

1900 really is fine for the rexpro. It will pop more at 2100 (amazing what 100 more rpms will do. Your safe up to 2100 with plastic paddles, you may wish to experiment a bit and pull that sucker up to 2K though.

25% nitro is pretty close to 30 so I wouldnt expect a big effect there either. Still a gov is a good thing, (or at least a rev limiter) You should double check your blade speed if you have not, anyway to be sure you are where you think you are. Good curves are basic and need to be in the TX anyway, but a gov can help with the bogging I think. Gov prices are down so for under 70 you can get a pretty decent one. Once you have one, you will wonder why you didnt sooner

Heres a thought, find a guy at your field you really trust who knows how to fly 3d really well and ask them to try the rolls, flips, tic tocs. Maybe if they can manage it and keep it from bogging then it may be just you, but if they are struggling then its setup or something phisical on the heli.

As for the wind tipping the heli, thats your paddle weight. Lighter paddles will cause this, but also give faster flip rate. Stock paddles are really good, I put on the Align carbon and noticed the wind tippage, but I soon got used to correcting for it and prefer the fast flip rate.

May help to check that the paddles are level at zero pitch as well

PS: on my rolls I barely give any pitch input, nearly at zero, because it is so responsive, but never heard of a bog in a roll really.
10-19-2009 10:04 PM
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ANDROSKI
Senior Heliman
Location: Bucks UK

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thanks there was some good points in the last post

Im the only one in my club who does 3d so im stuck with getting help. Im running the standard paddles and find the wind really affects the heli. Highering the head speed will make this worse. but if it sorts out the bogging i will give it a try

Never trust a man with a dodgy beard.
10-19-2009 10:16 PM
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Simmer
Key Veteran
Location: Massachusetts

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Try heavier paddles, it will stop the movement in the wind.

(do get the 440 flybar if your pro is older it may have the shorter flybar)
10-19-2009 10:50 PM
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ANDROSKI
Senior Heliman
Location: Bucks UK

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im worried that the 440 will snap i have a 400mm one. some one told me raptor black paddles work well

Never trust a man with a dodgy beard.
10-20-2009 08:32 PM
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ANDROSKI
Senior Heliman
Location: Bucks UK

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ive just ordered a 440 fly bar and some carbon fibre align paddles 17g I think. 1g heavier

Never trust a man with a dodgy beard.
10-21-2009 07:45 PM
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ANDROSKI
Senior Heliman
Location: Bucks UK

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changed the paddles plus flybar and still problems

I now have a 440 flybar and some align carbon paddles and still find the heli very afected by the wind. My Raptor 50 was alot smoother and handled wind better.

Never trust a man with a dodgy beard.
10-29-2009 10:44 PM
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Simmer
Key Veteran
Location: Massachusetts

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Two plus years and no snaped flybar, I have read that but have never seen it at any fields in my area.

Might be setup, I noticed the wind effecting me when I went to the Align carbon paddles but, I like the quick dlip rate and after a few flights I dont find it any issue. Might be your not used to it or your setup could make it better. Make sure your paddles are perfectly level at zero degrees.
10-30-2009 01:14 AM
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bmapope
Senior Heliman
Location: TN

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he was used to flying a RAPTOR!

The value of a man is shown in how he treats someone he can gain nothing from.
10-30-2009 01:35 AM
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Simmer
Key Veteran
Location: Massachusetts

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+1 there you go!
10-30-2009 03:50 PM
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ANDROSKI
Senior Heliman
Location: Bucks UK

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had two day`s now setting up

I have found its getting better and i also think im getting use to it i have also found out today the head speed i thought was at 2000 minus was in fact 2300 plus as a mate tacho`d it up for me.

Never trust a man with a dodgy beard.
10-30-2009 09:11 PM
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Align T-REX 600N 700N > T-REX 600N head speed and problems in wind
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