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Gaui EP550 › Tail pushrod upgrade?
02-09-2008 08:27 AM  10 years agoPost 1
Murph

rrNovice

England

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How does the standard tail pushrod ststem perform.Not sure about that bend in the frame end.
Is there a upgrade?Just seen part 204655,tail pushrod conversion.But not sure on fitment/placement,no photos.

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02-10-2008 12:38 AM  10 years agoPost 2
Bugdozer

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Los Angeles, CA

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When I received my Hurri, it came with the short boom upgrade but a long push rod. I was not too fond of the z-bend myself so I got the push rod upgrade and some carbon fiber tube. I installed the push rod upgrade and then measured out the correct length for the carbon fiber tube. Then I just JB Welded two short linkages in each end of the CF tube and added ball links. Works very smooth with no play and no supports needed on the tail boom.

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02-11-2008 12:34 AM  10 years agoPost 3
Sgt Heli

rrVeteran

Remlap, Al USA

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If I might ask a quick one on this topic:

On the 550, doesn't the long tail actually help keep it straight? Folks mention the short tail upgrade, why would you want that? Just curious, I have the long one.

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02-11-2008 12:51 AM  10 years agoPost 4
Bugdozer

rrNovice

Los Angeles, CA

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I have the short tail and it looks quite long and I can run 500mm blades with no problems. I think the original tail was just too long.

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02-11-2008 02:17 AM  10 years agoPost 5
xfaega

rrNovice

Utah

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I have both the long and short tail boom. Like the short tail boom for the looks and better CG.

((Flying Isn't For Everyone Until You Try))

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02-11-2008 02:33 AM  10 years agoPost 6
red_z06

rrProfessor

Dumont, NJ

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Long tail boom is needed for 550mm blade. Most will fly between 500 and 520mm blades and do not require the extra length.

www.JustinJee.com

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02-12-2008 11:49 PM  10 years agoPost 7
bbagle1

rrNovice

BR, LA-USA

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i have the short boom with a boom mounted 9254. Gyro is a 401. I never used the stock pushrod, i just use a CF rod from central hobbies with titanium ends. If I turn my gain above 25% my tail starts to wag. Do you think this could be from the CF flexing? Will using the boom mount adapter help this out by making the CF rod shorter and making it a straight shot?

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02-13-2008 12:32 AM  10 years agoPost 8
jnngill

rrApprentice

Castle Rock,Co - usa

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Does the tail hold at 25% gain? If it does then things are working. The amount of gain needed is going to be different on eack model. The idea is just to keep the tail locked with out wagging.

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02-13-2008 01:30 AM  10 years agoPost 9
red_z06

rrProfessor

Dumont, NJ

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Slow swaying below holding gain is called wag and fast swaying above gain is called hunt.

If the servo arm length is ideal, then typically 30-40% range is where you would see solid hold. Adjust the gain up by 2-3% at a time and observe the tail behavior. Note the stopping point of wag and starting point of hunt and try to set the gain in the mid point of these two numbers.

If you find the hold point below 20%, try using a inner hole on the servo arm and if the gain is above 50%, try to use outer hole on the arm.

www.JustinJee.com

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02-13-2008 01:35 AM  10 years agoPost 10
bbagle1

rrNovice

BR, LA-USA

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My tail hunts at around 23%. It is ok in a hover but during mild aerobatics it gets worse if I have the gain set that high. My servo travel is pretty low so moving in one hole may be a good idea. The tail does hold but it doesn't hold very well when I start pushing things hard. I will be installing a full metal tail along with radix 92mm blades this week. I guess now I will also be moving the ball in one hole on the servo arm. Thanks for the tips. My heli knowledge is somewhat limited, i have only been flying for a month or so.

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02-13-2008 01:43 AM  10 years agoPost 11
red_z06

rrProfessor

Dumont, NJ

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As you move to inner hole, servo torque translates to slightly slower pushrod movement but gains on force slightly. Reverse is true if you move to an outer hole.

If you see hunt while doing aerobatic or in the presence of a strong gust, then your gain needs to be adjusted down. Move in one hole and your gain % should rise a little.

www.JustinJee.com

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02-13-2008 02:02 AM  10 years agoPost 12
rstacy

rrElite Veteran

Rochester, NY

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How does the standard tail pushrod ststem perform.Not sure about that bend in the frame end.
Murph,
I did not like the bend either.
I purchased a generic boom mount for the servo and then cut and tapped the rod for the correct length.

Ray

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02-13-2008 09:15 AM  10 years agoPost 13
Murph

rrNovice

England

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Is there any boom servo mounts out there what will fit the 550.
Do not know dia of other heli booms.

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02-13-2008 02:00 PM  10 years agoPost 14
rstacy

rrElite Veteran

Rochester, NY

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HURRICANE 550 CNC TAIL SERVO MOUNT
[G-204710]

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02-18-2008 04:24 AM  10 years agoPost 15
kgfly

rrNovice

Melbourne, Australia

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Other boom servo mounts for the Hurricane 550
Is there any boom servo mounts out there what will fit the 550. Do not know dia of other heli booms.
I think you can get the TRex600 mounts to fit:
http://wattsuprc.com.au/product_detail.asp?pid=H60041

Otherwise I believe these helis have 21mm booms like the H550 and so boom mounts for them might do the job too:

* Hirobo Shuttle/Sceadu helis as they also use a 21mm boom.
(maybe this one: http://powergrunthobbies.com.au/shop...oducts_id=1437 )

* Quick of Japan EP8 and EP10
(eg http://www.helicopterhobbies.com/images/qtbmmed.jpg )

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08-24-2008 01:47 AM  10 years agoPost 16
bmichels

rrNovice

belgium

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I flew today for the first time the Hurricane 550 that I bought on EBAY. It fly NICE ! And got 7" hovering with the 2x3s2200mA :-). So, I will try tp fly 6" max in order to be easy on those used Lipos.

- I use 500mm wood blades. Is there any interest to go for the "short boom upgrade" ?

- I use the stock 850Kv Motor, but I will puchase BIGGER lipos, something like 6s4000mA or 6s5000 EvoLITE. Considering that I am still looking for long flying time, and that I am FAR from doing 3D? what is best: 500mm blades or longer 550 mm blades ?

If I upgrade to 550mm, do I need to change the motor ? If so, Then will I get less or more flying time out of my big Lipos ?

In other word, why is't everybody using 550mm blades instead of 500mm ?

PS: I am still looking for a nice and LIGHT scale military fuselage for this Hurricane. Idealy a HUGUES 500. Can one recomend one to me ?

thanks

sincerely

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08-25-2008 12:24 PM  10 years agoPost 17
dick smith

rrApprentice

perth

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Ha, i must have mine on wrong, mine looks all over the shop.I have also noticed that the cf tube i use sags a little in the middle, so it needs a support in the middle, but i havent worked out what to use..............

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09-27-2008 01:34 PM  10 years agoPost 18
bmichels

rrNovice

belgium

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Motor Z-20 980Kv: 6S or 8s ??
I was about to purchase a Z-20 980 Kv and a big 6s Lipos pack to replace my stock GAUI 980Kv, but... on Helidirect.com ( http://www.helidirect.com/product_i...roducts_id=6027 ) , it is stated:

"... especially good on Hurricane 550 with 8S lipo set up and 13T pinion"

So: 6s or 8s ? Which pinion for 6s ? (I am looking for Max flying time since I am in the process of training my hovering/translation, still far from 3D !)

thanks

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10-09-2008 10:47 PM  10 years agoPost 19
bmichels

rrNovice

belgium

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SERVO QUESTION:
I just bought the recommanded Futaba S9257 tail servo, but... it is much smaller than servo mount in the plastic frame !!

Is it the wrong servo ? Is it only for carbon frame ? Should I use an adapter ???

thanks

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10-12-2008 04:19 PM  10 years agoPost 20
Bugdozer

rrNovice

Los Angeles, CA

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The S9257 is a bit too small for the 550, not enough torque. I run a DS8900G but that's a lot more $$.

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Gaui EP550 › Tail pushrod upgrade?
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