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T-REX 600 › DS821 servos to Trex 600 - to much free space.
11-27-2007 09:51 AM  9 years agoPost 1
Epkencijus

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Lithuania

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Hello,

I`m buy Trex 600 heli. I have DS821 servos. I`m try put in the Trex 600 (alienor and pitch servos), but I don`t can, because I`m get to much free space ~5 mm.

Please help to me, how put this servo in the trex 600 ?

Thanks.

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11-27-2007 11:24 AM  9 years agoPost 2
ChrisC

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Essex - UK

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Hi Epkencijus

I was using DS811's which needed spacers (supplied in the kit) below the servo grommets, new I have BLS451's and these needed more spacing so i used two carbon servo mounting plates. Hope the picture explains this.

Have you done your research here on RunRyder as to the suitability of the DS821 for your application?

Chris.

Hooked on Align

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11-27-2007 01:31 PM  9 years agoPost 3
rccardude04

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Wichita, Ks - USA

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Don't use those servos! Horizon/JR even have a tech bulletin saying they do NOT hold up to larger than .30 size helis.
-Eric

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11-27-2007 03:02 PM  9 years agoPost 4
LiL'D

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Santa Clara, UT USA

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Yeah do not use thoose servos for anything on that heli because for one they are slow and second my buddy dave had them in his raptor and they have a nasty habbit of failing especially on the ailerons! He crashed because of that Go ahead and get the hi-tec 6965's. Me and
My buddy dave are now running thoose.

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11-27-2007 03:06 PM  9 years agoPost 5
lowflyer101

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garden grove, CA

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i am running them on my 600E with 6votls bec .. they are okay. used extra servo space

BTW, he seem to be newbies in learning pros. there r no need $100 /piece servo everywhere .

i flew the crap out of ds821

<-freedoom flyer->

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11-27-2007 03:08 PM  9 years agoPost 6
Eury

rrProfessor

Dover NH

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Don't use those servos! Horizon/JR even have a tech bulletin saying they do NOT hold up to larger than .30 size helis.
Read that tech bulletin again, they say they are fine in 50 sized electrics. It's the vibrations in a 50 sized glow that they can't handle. The 821s hold up fine in a 600e.
buddy dave had them in his raptor and they have a nasty habbit of failing especially on the ailerons! He crashed because of that
Again, 50 sized glow, they are not designed for a 50 sized glow.

Nick Crego

Citizen #0168

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11-27-2007 04:17 PM  9 years agoPost 7
XRguy

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Agawam, MA

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I use the ds821 in my 600E. I had 3050 futaba but needed something a lil better until I find the right bec/servo setup. Anways, I have been lazy and those 821's have been in there for 6months now and I fly the crap out of them.

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11-27-2007 04:33 PM  9 years agoPost 8
Ed1955

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Pocono Mountains, PA USA

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This warning is sooooo played!

Yes, there have been failures, We've all read about them but what we don't read about is the thousands upon thousands of guys that have been running them with no problems at all. Granted, if your a 3D stick banger flying 10's to heavy metal music with 40 people video taping your performance, they're probably not the right servo for you but everyone at the two clubs I frequent that are using them have not had so much as one problem and there are plenty of guys with them on board. Maybe there should be a sticky explaining that we only read the bad news about this particular product and those of us that are extremely happy with them don't bother posting about them because we're to busy flying.

While I put on my flame proof suit, let the torching begin!

Respectfully,
Ed

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11-27-2007 04:51 PM  9 years agoPost 9
helimatt

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Lafayette, IN

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I'd like to see posts of folks flying .50 sized electrics or smaller nitros with the 821's and they failed. Who has had that happen, and what were the circumstances? Mostly I hear warnings (second hand knowledge), and then folks chime in and say their personal experience has been great with these servos. I'd hunch that there have been relatively few failures. There were issues with the output gear failing, perhaps due to locktight being used on the output arm screw. As Hitec states, don't use locktight on the plastic output gear servos.

I had a 600E with 821's for a while, they worked fine (some 3D, not a lot), sold it with them and never heard back a bad report about the servos there.

On topic- I made spacers out of thin light plywood, very easy if you don't have OEM available.

Never, ever, ever, ever give up.

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11-28-2007 01:39 PM  9 years agoPost 10
rccardude04

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Wichita, Ks - USA

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For some reason, I guess I was thinking this was a Nitro 600 but I failed to read carefully.
If you look on the Raptor forums here on RR, there's an entire thread of a BUNCH of people who have had them fail in nothing more than FFF. I haven't had mine fail yet but it typically takes 2-3 gallons it seems like, and I'm at 2.5.
I could spend 170 bucks on servos now, or wait till they fail and spend 300 bucks fixing everything, as well as new servos... hmm... That's a toughie.
-Eric

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11-28-2007 02:38 PM  9 years agoPost 11
helimatt

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Lafayette, IN

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I just read through some of the posts in the nitro Raptor section concerning these servos. Not very good reports- note that all of those are nitro installations (some on cyclic someo on throttle, failures include gears/output shaft and electronics or motor).

So good info there, it seems like a bigger risk than I'd want to take flying these on a heli at all. Maybe the electrics without the nitro engine vibration are easier on the servos but still, pay the extra and get decent servos with proven reputation for reliability.

Never, ever, ever, ever give up.

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11-28-2007 03:08 PM  9 years agoPost 12
rccardude04

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Wichita, Ks - USA

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I would think one would be alright just doing basic sport flying with them on an electric CCPM setup, but I grounded my raptor since then and am going to buy new servos this winter. I already had an 8611A on collective but I'm probably going to go with the Futaba 9252s or BLS451s on cyclic. Throttle will probably get something cheap and standard, but I want those 821s off of there.
-Eric

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11-28-2007 11:29 PM  9 years agoPost 13
Epkencijus

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Lithuania

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Thanks guys for help. Now I have only this servo. Tonext time I`m try buy another servos.

Thanks,
Evaldas.

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11-29-2007 12:29 AM  9 years agoPost 14
alwallash

rrApprentice

Morgan Hill, CA (near San Jose)

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Labas Evaldas,
You need to make or buy extra spacers to fill the gap. No big deal.
Align sells carbon fiber support plates that can be used for this.
Or you can make you own out of plastic or wooden pieces.

My mother, Birute Matulis, was born in Lietuva and came over in 1939 just before the war. I have 8 aunts and uncles in Panevazys. Visited in 1985, before freedom!
Geras Laime....Good luck!
Albertas Valasinas

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11-29-2007 05:38 AM  9 years agoPost 15
pcskyhi

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Houston, TX

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I'm using 821s and the provided spacers without a problem.

pcskyhi - live and learn

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11-29-2007 11:32 AM  9 years agoPost 16
f penfold

rrKey Veteran

uk

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making spacer is the easy way of sorting out your problem

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11-29-2007 04:53 PM  9 years agoPost 17
pcskyhi

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Houston, TX

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Dagy when I return home I will take pictures and post for U.

pcskyhi - live and learn

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12-06-2007 09:04 AM  9 years agoPost 18
Epkencijus

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Lithuania

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To pcskyhi: when you come back to the home?

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12-07-2007 11:40 PM  9 years agoPost 19
pcskyhi

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Houston, TX

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Oh man, I'm sorry I forgot all about it. The wife has been driving me crazy with getting Xmas decorations up and going outside. I'll get those pics up 4 U this weekend!

pcskyhi - live and learn

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12-10-2007 07:21 AM  9 years agoPost 20
pcskyhi

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Houston, TX

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Here U go bro. Again, I apologize for leaving U hanging like that. I even put paper between the servos to show there is a gap.

pcskyhi - live and learn

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T-REX 600 › DS821 servos to Trex 600 - to much free space.
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