DPS DDS
Member
Posts: 40
Loc: Calgary, Alberta, Canada
Reg: 12-13-01
|
 01-30-02 05:33 AM - Post#636
i am thinking about buying a JR 8103 complete system. i have a couple of questions.1. which servos are better, the 517 or 531?? which one has enough torque and speed for the cyclic and collective?? 2. PCM or PPM?? Digital Trim or not?? does it matter. 3. is the JR 5000 worth the extra cost over the 550?? which servo is good to run with the gyros i am an intermediate pilot seeking the advice of the experts. thanks in advance, darren
|
Christopher J
Full Time Senior Member
Posts: 3351
Loc: Kansas City, MO
Reg: 11-09-01
|
01-30-02 05:41 AM - Post#637
In response to DPS DDS
I fly using a JR 8103 and love it. It's a great radio. The digital trims would be better. If you have to put in any trim for a model the radio "remembers" where the trims are when you switch between helis. PPM or PCM, the choice is yours on that, kind of an apples and oranges thing. The 531's are better then the 517, they should be fine for a 30 size heli. 5000 vs 550, I would choose neither even though I prefer JR equipment. The 5000 is over priced and a pain to set up. The 550 has no end point adjustments, you have to use your ATV's to limit the servo throw. By lowering the ATV you also lower your piro rate. For the price that the 550 runs with a 8417 HS servo I would go for the Futaba 401 w/9253 HS servo. They can be found as a combo for $200.just my opinion Christopher J
| Christopher J
East Coast Vario Field Rep
Size it up and then scale it down |
|
Rudy
Full Time Senior Member
Posts: 4841
Loc: Houston, TX USA
Reg: 03-14-00
|
01-30-02 05:51 AM - Post#638
In response to Christopher J
I will also say skip the JR line of gyro's. the Futaba line of gyro's have more features, are easier to setup, and are lower cost.Rudy Ackerman
Houston TX
If Wile E. Coyote had enough money to buy
all that ACME crap,
why didn't he just buy dinner? |
|
Helifun
Senior Member
Posts: 211
Loc: Royal Oak, Michigan, USA
Reg: 03-27-01
|
01-30-02 11:38 AM - Post#639
In response to Rudy
I also have the 8103, Chris and Rudy covered it all perfectly ....... great radio OK servos for a 30 but go with the Futaba gyro.HF.
|
vario
Senior Member
Posts: 307
Reg: 11-01-00
|
01-30-02 12:21 PM - Post#640
In response to Helifun
I was using the 531 servos in a low end machine and had one lock up full right aileron. Skip these servos and get good ones, or use Futaba 9202 servos with the radio instead.
Joe
|
z11355
Senior Member
Posts: 436
Loc: Backroads of America
Reg: 01-29-01
|
01-30-02 01:45 PM - Post#641
In response to vario
Most any servo can fail. What is 'enough' depends on what kind
of machine you want to put it on. Get the digital trim model of the 8103
and steer clear of the JR gyros.
|
DPS DDS
Member
Posts: 40
Loc: Calgary, Alberta, Canada
Reg: 12-13-01
|
01-30-02 03:41 PM - Post#642
In response to z11355
thanks for the response everyone.so from what i am gathering, use the servos that come with the JR radio for a pattern plane that i am finishing. then buy another JR receiver and run it with 9202's (on collective and cyclic), 3001 on the throttle and the 401/9253 on the tail.
then get a 2000 mah sub C battery pack. RIGHT?!!! what about the G2 interface cord? i have one to work with a Futaba 6X and i know it won't work with the JR. is there an adapter, or do i have to get a new cord?? thanks again, darren
|
Christopher J
Full Time Senior Member
Posts: 3351
Loc: Kansas City, MO
Reg: 11-09-01
|
01-30-02 03:43 PM - Post#643
In response to DPS DDS
Side note:with the Futaba servos you will need to shave off the "key" and file or shave the edges at angles to match the JR servo plug to get them to go into the receiver. Christopher J
| Christopher J
East Coast Vario Field Rep
Size it up and then scale it down |
|
z11355
Senior Member
Posts: 436
Loc: Backroads of America
Reg: 01-29-01
|
01-30-02 04:34 PM - Post#644
In response to Christopher J
why do you want to cart around all the
extra weight of a subC pack when you
can get a 1700-1800 A sized NiCd
that weighs about 1/2.
|
Christopher
New Member
Posts: 9
Loc: Visalia, CA
Reg: 01-16-02
|
01-30-02 04:36 PM - Post#645
In response to z11355
Some recent Futaba servos I've seen had the JR bevels molded in, and the key was only on the lower half of the plug, making it easy to remove for use in JR receivers. Good marketing, I think. I really wish that JR would just add slots to their receivers to accept Futaba servos, but that's probably an unrealistic wish. Chris
|
Hockeytown
Senior Member
Posts: 102
Loc: Pontiac, Mi, USA
Reg: 07-30-01
|
01-30-02 06:53 PM - Post#647
In response to Dyehard
Chris J. is right. I just got 4 9202 servos and the connector has a "tongue" that is only on half of the connector. When I shaved mine off, it didn't weaken the tab near the wires like it used to.......so the tab doesn't break off the first time you try to pull the plug out of a Rx anymore.Definately a step in the right direction! Darin
|
Mr_Magoo
Member
Posts: 64
Loc: Chugiak, AK
Reg: 06-30-01
|
01-30-02 07:24 PM - Post#648
In response to Hockeytown
The problem is that Futaba is the company taking the steps in the right direction (by allowing the key to be shaved without weakening the plug). JR won't make their receiver sockets slightly thicker to allow Futaba servos to be easily installed. I don't mind trimming the key. But, I don't like sanding the plug thinner. I buy Airtronics receivers to use with my JR Transmitter. I can use Futaba servos more easily. <G>You'll like the 8103. I am very happy with this transmitter. I've worked a tiny bit with the Futaba 9CH. Two very subtle advantages of the 8103 over the 9C are:
1. The 8103 has two 5-point mixers and one 3-point mixer. The 9C has one 5-point mixer and two 3-point mixers. I prefer 5-point mixers for the cyclic to throttle mixes.
2. The JR8103 Graph gives a discreet output for every input stick position. I use this feature to set up my heli by myself. I collect data points for specific throttle and collective servo output hover points and measure the corresponding rotor rpm. I then set my 1/4 and 3/4 hover points to the outputs that give me my desired rpm. This sounds confusing, but that graph output number is ver useful to me. Maybe the 9C has these abilities, but I wasn't seeing it in the little time I was helping someone with their 9C. Of course, if I wasn't such a cheapskate, I'd buy governers and wouldn't need these two features. I highly recommend the 401/9253 gyro/servo combo. Regards,
Mike
|
rickc
Senior Member
Posts: 135
Loc: Green Valley IL. USA "Tor...
Reg: 05-13-01
|
01-30-02 07:59 PM - Post#649
In response to Mr_Magoo
I use 531's in my Ergo 30SS, I have around 20 gallons of fuel flow with them and there still working just fine. No problems.Rick
|
Christopher J
Full Time Senior Member
Posts: 3351
Loc: Kansas City, MO
Reg: 11-09-01
|
01-30-02 09:22 PM - Post#650
In response to rickc
Actually that was Christopher, not me.Christopher J
| Christopher J
East Coast Vario Field Rep
Size it up and then scale it down |
|
JRMAN
Member
Posts: 31
Loc: Macedon New York USA
Reg: 05-03-01
|
01-30-02 10:21 PM - Post#651
In response to Christopher J
You get what you pay for And JR gyros are only hard to set up if you can't read.
|
dschertz
Senior Member
Posts: 191
Loc: Jackson,MI
Reg: 03-27-01
|
01-30-02 10:45 PM - Post#652
In response to JRMAN
I personaly use a 550t gyro with G8700 servo and followed the directions and works great as far as servo's I still run the 531 in my Freya with not a bit of problem.
|
Remten
Senior Member
Posts: 188
Loc: Canada
Reg: 11-19-00
|
01-30-02 10:51 PM - Post#653
In response to dschertz
Hi531's in a 60 size?
|
Dyehard
Senior Member
Posts: 272
Loc: Richlands, Va.
Reg: 01-27-01
|
01-31-02 05:32 AM - Post#646
In response to Christopher
Christohper, yes that is an unrealistic wish, remember who you are talking about.
DPS, if you are using G2 with the transmitter interface, the cord that plugs into the transmitter should have a short adapter on the end. The adapter is used with a Futaba transmitter, if you remove it, the mini plug that's on the end will plug into the trainer port on a JR transmitter.
|
rickc
Senior Member
Posts: 135
Loc: Green Valley IL. USA "Tor...
Reg: 05-13-01
|
02-01-02 07:54 AM - Post#654
In response to Remten
531's in a .60 size machine is pushing the risk factor in my opinion. They work fine in my 30 for 3D, even a .46 possibly. But in my .60 I run 8411's. Be careful.Rick
|
Hockeytown
Senior Member
Posts: 102
Loc: Pontiac, Mi, USA
Reg: 07-30-01
|
 02-01-02 03:36 PM - Post#655
In response to rickc
Sorry Christopher J..........I saw your post just above that one and it was still fresh in my mind. I guess that was quite a compliment to Christopher, me confusing him for you  Darin
|
