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Other › I like the hs50
10-10-2005 02:14 PM  12 years agoPost 1
willard

rrApprentice

Indianapolis, Indiana, USA

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flame me but I like the hs50 so far as a tail servo.

It is very fast, and lacks torque, BUT!

the t-rex tail slider has such a small amount of travel, that you need to have the tail control arm close to the center of the servo to keep the limits on a 401 to 100% (this is recomended for best gyro resolution by futaba)

I drilled a new hole in the servo arm 4.5 mm out from the center and now get full throw on the slider with 100% limit on the gyro.

with the pushrod that close to the servo center, the HS-50 now has more torque and less speed.

My tail is great so far with this servo, and I think it is underated. because the tail pushrod NEEDS to be so close to the center of the tail servo on the rex, it seems to me the most important factor for choosing a tail servo for the rex is speed speed speed.

the pushrod being so close to the center of the servo effectively converts some of the servos speed to torque. A slower more torquey servo such as the hs 56 will end up excessively torquey and too slow when you put the tail control rod where it needs to be.

This may be why so many are having tail wag issues. compared to other micros Ive seen, the pitch on the rex tail slider is fine, but the given travel per degree pitch change is very small.


justm my 2 cents

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10-10-2005 02:38 PM  12 years agoPost 2
VinceHerman

rrApprentice

Wadsworth, OH

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I still have the HS50 on my Rexie.
Do put shome shrink wrap around it to keep the cases from separating in flight. (not CA glue, as this will monkey up the mechanics)

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10-10-2005 06:16 PM  12 years agoPost 3
willard

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Indianapolis, Indiana, USA

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haha just me and you then Vince!

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10-10-2005 06:53 PM  12 years agoPost 4
stpeteheli

rrApprentice

St. Petersburg, FL

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I've had mine on since day one. Well over 150 flights and at least 10 crashes. Still going strong. Never had any wag problems and holds just fine for me.

Niles

Swift C550, Z30A-800 11T, CC45HV, 7s MaxAmp - 8s eMoli, DX7

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10-10-2005 07:03 PM  12 years agoPost 5
willard

rrApprentice

Indianapolis, Indiana, USA

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Niles,

no wag problems here either and plenty of torque with the tail push rod at 4-5 mm from center of servo arm!

Gain is at 68 % in heading hold, or 80% total on the entire 100% scale I get a very slight wag any higher, but not much of one.

I was even hovering against blustery cross wind yesterday, no wag and only very very slight drift with a 401 gyro. The heli was getting tossed around like a top but the tail was rock solid!

Before the gy401, well that was a different story futaba GY gyros rock!

Will

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10-10-2005 07:12 PM  12 years agoPost 6
stpeteheli

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St. Petersburg, FL

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I was even hovering against blustery cross wind yesterday, no wag and only very very slight drift with a 401 gyro. The heli was getting tossed around like a top but the tail was rock solid!

Swift C550, Z30A-800 11T, CC45HV, 7s MaxAmp - 8s eMoli, DX7

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10-10-2005 07:28 PM  12 years agoPost 7
MikeInMobile

rrElite Veteran

Mobile, Alabama

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When I had the HS50 on my rex, I too was impressed ...... unitl it seperated in flight !

The HS50 is fast, but is a little too sloppy for my tastes. There is a fix to reduce the gear slop for this servo, and once performed, I think that this servo would be a great choice if it didn't have the seperation issue. I now run a HS56 on one of my rexes, and a Cirrus servo on my other, I prefer the Cirrus servo (once I got one that actually worked) since it is fully ball raced and has very little slop. The speed and torque are also exceptional. The only drawback to the Cirrus servos is that they strip very easily.

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10-10-2005 08:39 PM  12 years agoPost 8
Tmaster

rrKey Veteran

TX

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I was running dual HS50s on my tail. It was decent, but sloppy. I then put a HS56 on the tail, right at the fin. Using 6mm from the servo axis to the horn linkage. Man its better. The tail is so solid holding now I would even say there is not even a hint of wag. running Gy240 and 70% gain.

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10-11-2005 04:29 AM  12 years agoPost 9
Coolpowered

rrKey Veteran

Youngstown, ohio

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Been running the hs 50's on the rex since x-mas, no problems, just make sure you tape the thing up so it wont seperate, thats all we use for the tail in my club, got to be around 15 t-rexes in our club alone.

YRCHA CLUB MEMBER

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10-11-2005 12:46 PM  12 years agoPost 10
nojohnny101

rrElite Veteran

10 miles north of Cincy, OHIO

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hey
guys i'm just installing a GY401/HS50 combo on my new HDE T-rex.....

do you guys have a measurement for the slider to be center....like for the raptor they give a measurement of 4.5mm the slider to the case...

any measurments like that?? also does your guys' hs50's humm or like creak really loudly???...sounds like mine is constantly trying to center


Thanks
~Will~

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10-11-2005 01:53 PM  12 years agoPost 11
willard

rrApprentice

Indianapolis, Indiana, USA

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in heading hold mode the servo will slowly creap to the ends of its travel limit.

You might want to make sure the control rod isnt binding in the guide under the horizontal stabilizer. I took a drill bit (3/32 I think) which is just a hair bigger than the guide and ran it through the guide by hand so that with the servo disconnected you can waggle the rod and just feel it move in the guide.

In terms of offset, heres how I did mine:

drilled a new hole in the servo arm 4.5-5mm out from the center of the arm (used a ball link connector instead of the zbend)

leave the 401 limits at 100%

put the gyro in rate mode after its initialized

Set the servo on the boom so that when you give full right rudder, the pitch slider moves as close to the tail rotor housing as possible without the servo binding (buzzing).

This should give you about 4-5 degrees positive pitch on the tail blades when the rudder stick is centered, which is also what I have found is required to keep the heli from rotating when hovering in rate mode.

Will

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10-11-2005 02:07 PM  12 years agoPost 12
nojohnny101

rrElite Veteran

10 miles north of Cincy, OHIO

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hey
thanks for hte help will......nice name


Thanks
~Will~

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