Multiplex servo question Profi MC V2
 

Can anyone with experiance with this servo tell me if it will be ok to run them exclusively in an ISOBAR on a five cell 1800 MAH pack? There seems to be some confusion as to the real torque on them. The website says 60 some ounces, and Karlton told me that the servo compares to the JR 8411 (in fact he told me when the two are coupled, the multiplex will pull the gears out of the 8411) When I asked about the torque rating on the website, he said that a different kind of battery was used than other manufacturers use to show their torque. I can't get ahold of him to verify any of this information, but it became important very important today when my builder said he's not sure the profi will work. Although, Karlton indicated it wouldn't be a problem. My builder wants a better understanding of this "different" battery deal. Anyone know what Karlton is talking about? Anyone have the profi's in a jet? I've got 7 or 8 of these servos and would love to use them, but not if it's questionable.

Multiplex servo question Profi MC V2
 

Well I never used "big servos" I feel you don't need lots of power if you are going to fly like a jet. If you think it neat to fly like a Pitts you need more servo power. If you use all the servo travel, your CG doesn't move much and the CG is as far back as you can stand it, a smaller servo will do. A 5 cell pack will shorted the servos life, any servo .
I use the Profi on my 106. www.acsip.com/~dgu
Darryl Usher

Multiplex servo question Profi MC V2
 

Sean, I have many MPX digitals on my current Isobar and the last one. I am at work right now and can not verify, but I believe that my current Iso (the big heavy pig) has two Profis on elevator (in my opinion this is where you need the most torque on an Iso, except deploying flaps while too fast). They are the higher torque version not the "speed". They are way more than enough and work just fine. I run two 1400 mah 5 cell NiCads with never an issue. Please let me know if I can help further.

Profi V2 servos
 

Sean,
I have used these servos for years often on jets and always on 5 cells. The original V1 servos are still flying 10+ years on. They are rock solid mate.
As for the pull, well all I can say is that I have also bought another make of digital servo that is rated at a higher torque than the Mpx ones. Smaller too (but nearly twice the price).
Shame that they were LESS powerful!
Refards,

John.

mcV2
 

Hello Gentleman. I recently purchased a 40% Edge that has two red Multiplex servos in it. I am totally unfamiliar with this product line. I did a search on it and wound up here. Can someone also lead me out of the dark on the servos in my plane. In other words, are they digital, are they a real old, or real new model, and are they in fact comparable to the 8411 type servos used in larger (40%) models? From what I can find, they are powerful, but slow and don't center so great! Thanks for your help_bob

Multiplex servo question Profi MC V2
 

Bob, I should be able to help. Exactly what servos are they?

Multiplex servo question Profi MC V2
 

They are the mcV2's ;)

Multiplex servo question Profi MC V2
 

All recent MPX digitals are MC/V2s. Which type (model) of MC/V2s are they?

Duhhh
 

Sorry about that :stupid: How can I find that out?

Multiplex servo question Profi MC V2
 

Look at the label. It should say Profi, Profi Speed, Royal, Royal Speed, etc. Are they standard sized servos? Unfortunately, the MC/V2 portion of the Multiplex USA web site is no longer there. I could have had you go there and look.

Size Matters
 

These babies are really BIG! They are installed in a plane, but I could probably get a close measurement. I guess I'm trying to anticipate some future service or replacement when necessary. Maybe they're outdated :confused: I like to have spares for quick change in a pinch. Are these servos going to be readily available once the HiTech situation is stabilized? Thanks_bob

Multiplex servo question Profi MC V2
 

MC/V2 specs are still available at
http://www.ss16.dial.pipex.com/Multi...vos_frames.htm

Choose the servo in the left hand pane to see its spec.

H

Multiplex servo question Profi MC V2
 

Woketman,

The McV2's are actually the 2nd generation digital Multiplex servos
The MC were the first and now we have the Digi's and the McV2's are no longer being manufactured.

The McV2's are totally programable and the Digi's are only programable on the reverse rotation.

Multiplex servo question Profi MC V2
 

Thanks Roger, I was aware of that, although I have never had any 1st generation digitals. Sounds as if these are Jumbos.

Whew
 

Let me get this straight. There are Jumbo, Jumbo Speed, Jumbo Digi, and Jumbo Speed Digi :confused: That link is packed full of info, Thanks! If I have this right, mine are probably the jumbo. I'll try to measure them tonight. If that's the case, are there still parts and service if I need it, or just replace them when they start to show signs of wear? Do the gears get sloppy at neutral like some of the digitals? What would you guys use as a replacement, and where would i get them? Thanks alot_bob

Re: Whew
 

The Jumbo and Jumbo Speed are basically the same whether they are Digis or McV2.

When a servo becomes sloppy at center, its not because its a digital, but rather the type of gear it has and usually metal gears.

I have been using Multiplex servos for well over 20 years and the ones that got sloppy were the Profis of 20 years ago which they were not digitals. I still have about 5 of them and yes they still work.

The Multiplex servos with nylon gears will not get sloppy. If your worried about the servos you have, I wouldn't if I were you, Multiplex servos are the Rolls Royce of servos.

Multiplex servo question Profi MC V2
 

Roger is correct, definitely the Rolls Royce of servos. Ernie Pritchard in Payson Arizona, USA is the USA MPX repair guy (at least for now, until Hitec gets up to full steam on the MPX stuff). He can get parts and fix anything. PM me for his contact info.

Multiplex servo question Profi MC V2
 

I need some digis on my forthcoming jet. JR8411s are recommended. I would like to use the new Mpx Digi brand (MC/V2 no longer available here) partly because I am so impressed by the Mpx Tx and partly because in the UK an Mpx Digi Profi is just over half the price of a JR8411. But the specs quoted especially for torque are way below the JR8411 claims, in fact the Mpx digi's torque are no better or sometimes less than JR claims for its normal servos! Holding torque quoted for Mpx Digis is of course much higher than normal torque. What is going on? Is JR's claimed torque really the holding torque?

Harry

Multiplex servo question Profi MC V2
 

I'm the person to answer the question of torque, as two nights ago, I ran the test!! This is what we did, we took an 8411 JR and a MC V2 Digi Profi of multiplex. We used a US postal service ounce scale and a piture of water as weight. We hooked up fishing line through the piture and hooked each servo up with a hanger 9 metal control horn at one inch with a 4-40 bolt as the "hook". The JR servo took 135 ounces and jerked it around like it was nothing. We decided that this was enough power, and no need to take it to 150 ounces or more. We had worked ourselves up to that from starting at 50, then 75, then 100. On the multiplex servo, we started at 50, and it jerked it around no problem. At 75 it choked and would not lift the weight. We went back to 60, it was fine. we went to 65 it was fine no problem. We didn't keep going after 65. This was on a 1200mAH 4.8 volt nickel metal hydride pack. JR 10x transmitter with a JR 955 10 channel receiver. Any questions, email me directly. Do not trust a mulitplex digi profi on a control surface that could see over 65 ounces pressure. It will not control the airplane.

Multiplex servo question Profi MC V2
 

Reid calculated on the isobar elevator that at 200 mph max deflection elevator would need 200 onces torque. The ailerons would need 80, the flaps at 100 mph max deflection would need 100 ounces torque.

Multiplex servo question Profi MC V2
 

Sure would be fun to see the elevator move to max at 200 mph. The ballistic arc the fuselage makes without wings would probably be impressive.

Multiplex servo question Profi MC V2
 

May come of some surprise, but as I understand it, the jet is being redesigned and built for every worst case scenerio by a full scale aircraft designer and builder. I asked specifically if I would be able to jam the controls in any direction I wanted at full speed and the answer was yes. We'll see.

Roger
 

Is that to say that the Jumbo's I have are nylon gear? If they are, are large multiplex nylon gear servos acceptable in giant scale? Thanks for your patience, just trying to understand as this is very new to me_bob

Re: Roger
 

I think there is a misconception about giant scale, you don't need metal gears.
I don't like to use metal gears myself because of the slop that builds up fast.

Multiplex servo question Profi MC V2
 

That's intersting. I am looking for an alternative to the slop issue. So you guys have been using Multiplex nylon in 40% stuff let's say with satisfactory results? Things like torque and speed are to your liking?