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HelicopterAlignT-REX 700N › main rotor power problem
12-27-2008 07:00 AM  8 years agoPost 1
shahram

rrNovice

Tehran-Iran

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when I flipped Tail Boom goes up & down (Vertical movement)
my engine is no reach high needle is opened one turn and that it seems it work great but I think rotor it doesn't have enough power
if anybody knows the reason,please inform me

engine temperatures 90(centigrade)
Blade 680mm
engine 90hzh with pump
muffler hatori
Idel up 1 1600
Idel up 2 1700
fuel 16%oil,15%nitro
Pitch -+11
cyclic -+7

Shahram

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12-27-2008 02:53 PM  8 years agoPost 2
S76 Mech

rrElite Veteran

Hatboro, Pa.

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assuming your in Idle2, 1700 sounds a little too low. bump up your headspeed and see how she does.

(vertical moment) do you mean like performing tic-tocs ?

Gaui Greatness X7, X5, NX4, X3

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12-27-2008 03:09 PM  8 years agoPost 3
shahram

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Tehran-Iran

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I don't think 1700 is low but I will bump up headspeed
about vertical movment I mean like tictoc but a bit from each side (up&down) that I know this problem is for low headspeed
but I did flip&roll with this headspeed with Raptor&Sceadu

Shahram

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12-27-2008 03:26 PM  8 years agoPost 4
BJames111

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San Diego,​California

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I don't think 1700 is low but I will bump up headspeed
Actually 1700 is quite low. The 700 was designed with hard 3d flying in mind, and most people run 1950 or so in idle up.

The dampers are pretty hard on the 700, and will require a higher headspeed than what you've got.

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12-27-2008 03:59 PM  8 years agoPost 5
Quandumphone

rrApprentice

Yuma, AZ

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I agree, higher headspeed is needed. You have slightly shorter blades than what I think most people are running, so you would need a slightly higher headspeed to see the same stability as a longer blade. Not much but it is a small issue.

Just to clarify the problem, are you saying that there is vertical tail movement after stopping at each side of a tic-toc or other fast cyclic elevator action?

Also, isn't 16% oil a little low for a helicopter? That has nothing to do with the tail movement but I noticed it as being a bit unusual.

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12-27-2008 04:10 PM  8 years agoPost 6
alex 911

rrApprentice

puerto rico

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crank that headspeed to 2000rpm and then you are going to tell another story ......good luck with it

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12-27-2008 04:23 PM  8 years agoPost 7
LONEWOLF2440

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MYRTLE BEACH S.C

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2000 is to high for a 90 size should be around 1850 to 1940

MIKADO LOGO 600 TREX 550

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12-27-2008 04:30 PM  8 years agoPost 8
oysifly

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Bentonville, AR

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For the OS engine 1940rpm is the headspeed to achieve top performance. Your headspeed is too low. Bump it up to 1900-1940rpm

Quick...here comes my wife....hide that new Heli !!!!

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12-27-2008 08:16 PM  8 years agoPost 9
shahram

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Tehran-Iran

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I think Align's gov has problem

my radio is 9303(9x) JR

my ATV is

normal 50%
Idel up1 60%
Idel up2 70%

Are these right?

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12-27-2008 09:39 PM  8 years agoPost 10
LONEWOLF2440

rrElite Veteran

MYRTLE BEACH S.C

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Nope on my 9303 i have 0 for normal 75 on idle1 and about 79 on idle 2 but ya still need to tach your head speed i leave it at 0 in normal cause i dont want the gov working in normal flight mode

MIKADO LOGO 600 TREX 550

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12-28-2008 10:48 AM  8 years agoPost 11
shahram

rrNovice

Tehran-Iran

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thanks for your reply
could you tell me how much are head speed 75&79 ?

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12-28-2008 01:29 PM  8 years agoPost 12
LONEWOLF2440

rrElite Veteran

MYRTLE BEACH S.C

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Mines about 1850 idle 1 and about 1920 idle 2

MIKADO LOGO 600 TREX 550

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12-28-2008 11:13 PM  8 years agoPost 13
JAGNZ

rrProfessor

Auckland, New​Zealand

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You need to tach the head to be sure. I am running 1940 in Idle up and it has more power than I need.


Jason Greenwood

www.3dheli.co.nz

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