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Spektrum users - 8/1/2007 9:00 AM   
s-10promod


 

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From: Wichita, KS, USA
Status: offline 		Has anyone tried the new AR6200 receiver from Spektrum yet? I'm trying to decide if I should use it or stick to the AR7000, Will a Hitec HS-225 MG be enough servo for ele.and ale. in a Q40?

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RE: Spektrum users - 8/1/2007 3:06 PM   
daven



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Status: offline 		Don't know about the AR6200 receiver, but I wouldn't recommend the 225's for Q40. I tried the same thing on my first Q40 (using the 225's) and for years I thought the plane just didn't fly very well. At first I thought it was the balance, then the plane, and it mainly sat unflown for years. A couple years ago I swapped out the 225's and what a difference. It took a plane that I never enjoyed flying into one of my favorite flying Q40's (long nosed Larson Dago). Holding a true center is extremely important, especially flying something as fast as a Q40. The 225's are notorious for having a sloppy center, and the MG's only make that worse as they wear faster than nylon.

The cheapest, good, servo I would recommend is the Futaba 9650 digital (nylon gears).

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RE: Spektrum users - 8/1/2007 6:06 PM   
s-10promod


 

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Status: offline 		Thanks, I'll get some better servos on the way!

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RE: Spektrum users - 8/1/2007 6:17 PM   
fizzwater2


 

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Status: offline 		Daven - do you use the 225's on Q500 planes? I've been using them in a plane with no troubles, the nylon gear versions.

Just curious.. I also use some older JR 3021's that I have, and like them, too. Have you used any of the digital 3421SA servos? Kinda spendy, but what do you think of them?

I'll most likely keep using my 3021's and 225's for now, but not the metal gear versions.



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RE: Spektrum users - 8/1/2007 10:13 PM   
rmenke


 

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Status: offline 		Daven:

In your humble opinion, what is the cheepest best JR servo to use? Going through my inventory, find there is 3 I should change.

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RE: Spektrum users - 8/2/2007 12:34 AM   
daven



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Status: offline 		Yes I have used 225's in Q500, most work just fine, I ran them for years. I have seen some that move faster than others, so make sure the speeds are close to being the same when using them on a V-tail. I really thought they were fine until I started trying some of the better servos.

I'm not aware of the 3021, but I use quite a few JR 3121 servos, and I would definately recommend those (both Quickie and Q40, any surface). I have used the digital version (3421) and don't think its worth the extra dough, or weight. The 3421SA is just a Nylon Geared version of the 3421, I've not tried them.

For a while, I used quite a few Expert SL451 servo, very similar to the 3121. However, I've had a few of them fail, and no longer recommend them. I believe their is a JR Sport servo similar to the Expert, but I haven't tried them.

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RE: Spektrum users - 8/2/2007 12:41 AM   
diggs_74



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Status: offline 		I've used some of the 225's on the rudder and or fuel shut off on a Q40 but not for anything else.. I have used the digital version(5425) without an issue. The main problem with those is weight as they are metal geared and then the eventual slop. I have heard of guys changing out the MG with nylon gears out of a 225 but for a Q40 I just stick with the Futaba 9650's on the elevator and aileron..


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RE: Spektrum users - 8/2/2007 1:42 AM   
fizzwater2


 

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Status: offline 		I think the JR sport mini is the MN48. I do believe they are nylon bushings, not ball bearings on the outputs, but that's from a quick perusal of their info at Horizon Hobby, not from personal experience. However, they are only about 22 bucks. Might be worth trying a couple, and might be worth seeing if there's a bearing that would replace the nylon bushing, if they truly are made that way.

Has anyone tried this?

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RE: Spektrum users - 8/2/2007 3:41 AM   
Jim Duda



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Status: offline 		fizz - I'm interested in what you find out about the JR MN48...

I think I had my first failure with the Expert SL451 Dave mentioned - lost a 424 Viper with a TT Pro 40.

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RE: Spektrum users - 8/2/2007 5:00 AM   
s. wallace


 

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quote:

ORIGINAL: fizzwater2

I think the JR sport mini is the MN48. I do believe they are nylon bushings, not ball bearings on the outputs, but that's from a quick perusal of their info at Horizon Hobby, not from personal experience. However, they are only about 22 bucks. Might be worth trying a couple, and might be worth seeing if there's a bearing that would replace the nylon bushing, if they truly are made that way.

Has anyone tried this?


I've used MN48's in a 424 Seeker and Hurrikane this year, maybe 30 flights each to date. I like them a lot so far, they do seem to center better than the Hitec 225's I used to fly. If I ever move up to 428 I would spend the $$ for JR digitals, but for sport racing I'm pretty happy with the JR Sport MN48's. I have not looked for a bearing upgrade for them as yet, might over the winter.

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RE: Spektrum users - 8/3/2007 6:51 AM   
Jimnie


 

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Status: offline 		Why do you believe the MN48 does not have a ball bearing? There is plenty of bad info on RCU, let's try to be a little better than the rest.

The MN48 and the Expert 451 are both ball bearing servos. MN48 does seem to be faster. Seems like a great servo for the price.



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RE: Spektrum users - 8/3/2007 7:11 AM   
fizzwater2


 

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Status: offline 		I stand corrected - I could swear I saw "Nylon" in the bearing / bushing spec on that servo, but I was wrong. Nor does the Horizon site say ball bearing. But, if it's a ball bearing servo, then it sounds to me like I better give 'em a try just the way they are! They do sound like a pretty darn good deal for the money.

Jimnie, thanks for pointing out my error!

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RE: Spektrum users - 8/3/2007 10:40 PM   
Jimnie


 

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Status: offline 		Sorry Fizz,
Just see to many of these things on the forum and I like to hold us pylon racers to a higher standard. Right!. Anyway I have all four, Expert, JR Sport, 3121 and 3421. The 3121 has the coreless motor but not digital so it always seems to end up in my airplanes. The 3421 seems like overkill for Q500?

Thanks for an open mind Fizz! Gotta control myself. Oh, BTW, airplane does have DX7 with AR6200 rx (isnt that where we started on this thread?? I forget?)

Jimnie

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RE: Spektrum users - 8/10/2007 5:12 PM   
s-10promod


 

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Status: offline 		So what's the verdict? Is the JR mn48 enough for Q40, or does a Q40 need the 3421sa or Futaba's 9650? Thanks

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RE: Spektrum users - 8/10/2007 8:43 PM   
Jimnie


 

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Status: offline 		Both the first and second place world championship F3D models used the 3421 on all the control surfaces with the AR7000 rx.

If that doesn't answer it, then there is no hope.

Jimnie

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RE: Spektrum users - 8/11/2007 12:10 AM   
bl10


 

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Status: offline 		Not voicing an opinion but F3D 1st place Randy Bridge and 2nd place Travis Flynn are both sponsored by JR. Wouldn’t expect to see anything else.

Now voicing an opinion. Virtually all manufactures produce a servo that will work fine in either Q500 or Q40 for all controls.

Barry


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RE: Spektrum users - 8/11/2007 12:44 AM   
Jimnie


 

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Status: offline 		Thats kind a my point, they have the choice to use anything they want, they chose 3421's. But you are right, in that other manufacturers make servos that woud do the job. His questions regarded the JR servos though. It's all for fun, lets go race em.

J-

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RE: Spektrum users - 8/11/2007 1:13 AM   
Jim Duda



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Status: offline 		Has anyone tried the MN 48 in a Q40?

http://www.horizonhobby.com/Products/Default.aspx?ProdID=JSP20040
http://www.horizonhobby.com/Products/Default.aspx?ProdID=JRPSDS3421

Comparing MN 48 with the JR 3421:
Same Speed
Same Size
Weight: MN 48 = .8 oz. 3421/3421SA = 1.04 oz.
Torque: MN 48 = 48 oz./in. 3421 = 65 oz./in.
Motor: MN 48 = 3 pole, 3421 = Coreless
Gear Train: MN 48 = nylon, 3421 = metal, 3421SA Hybrid (alum output, nylon mid gears)
Centering: This is where actual flight tests would make the choice clearer. Perhaps this precludes the MN 48 from AMA 428 and 422 applications...I dunno.

Price: Wow! What a difference!!!





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RE: Spektrum users - 8/11/2007 1:15 AM   
s-10promod


 

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Status: offline 		If I had JR shirts in my closet I wouldn't be asking which to use, but since I will be paying for these that's why I'm asking if the MN48's will work or do I need to use the 3421's? The torque specs. and speed are close so how much is enough? Thanks!

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RE: Spektrum users - 8/11/2007 4:26 AM   
Terryoc


 

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Status: offline 		Why not try the Hitec HS-5245 I am using these in our F400 class which is Q40 without nitro but bigger venturi and open props and also in our QM class with 21 size motors which are about 15 to 20mph slower and have found them excellent.
On the QM I race with just over 1/16" elevator movement and have had no trouble with trim changes.
They are about double the MN48 but half the price of the DS3421.
Also will be trying the AR6200 in a week or so in my QM can report back then.
Terry

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RE: Spektrum users - 8/11/2007 4:15 PM   
luv to race


 

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From: Liquored, FL,
Status: offline 		Without sounding bias towards JR equipment, he is my take.

The main question of the thread...The AR6200 spectrum receiver will work just fine in Q40, or Quickee for that matter. No issue at all.

Servos - Choosing a servo for most people comes down to money. And just like a car, computer, gas, food...you get what you pay for. Now, the MN48 is a great "sport" type servo. It will work in 424 no problem, I had them in my 424 and they worked perfect, until I loaned the plane to Marcus and now it dead (thanks buddy!). I do know of one failure in a 428 plane on ailerons. Not sure if the servo jumped gears or what, but the plane all of the sudden stuck in a right hand roll and crashed. The servo was brand new, and it was the first flight on the plane. Maybe the guy stripped the servo during set up, I really don't have that answer? So.. would I put them in a Q40, no I wouldn't. To me, it's worth the extra money to buy quality servos and protect your investment (the plane and engine).

Servo technology has come a long way for most companies, I like to think that JR pretty much leads the pack on servo performance and staying on top of R&D. However, I have had 2 servo failures myself with JR… with that said you can see I'm being very honest, and all servos can potentially fail. Us racers expose servos to a harsh environment and nothing is bullet-proof. I had a JR3121 fail on elevator in a Q40. The servo just quit on landing. I also just recently had an FAI plane lose an aileron servo, Futaba 3002. Plane was given to me by Fred and after 50 or so flights when the servo quit (with all the Futaba boys watching). When I first started racing I flew HiTec servos for the same reason most guys do, because they were the cheapest. But, I always fought trim issues with those and it drove me nuts, they just never seemed to hold center very well and every morning before a race I had to test fly to re-trim the plane. The good side to HiTech, is there costumer service was always very good and repairs on equipment was very easy on the pocket book. I flew a quickee with the Futaba 9650 digitals on elevators, I thought they worked well. Good centering, plenty fast..can't complain about those at all.

There's my take.

Randy Bridge


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RE: Spektrum users - 8/11/2007 5:15 PM   
daven



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Status: offline 		Someone mentioned the Hitec HS-5245 on the previous page. I have used quite a few of those, and I wouldn't hesitate using those on a Q40. My main to reasons they are not my #1 preference is they are Metal Geared and slightly heavier. I would choose a 3121 JR or Futaba 9650 over the Hitecs only due to weight and the fact they use nylon gears.

However, I'm not aware of a servo cheaper than $50 that I would use on Elevator or Aileron on a Q40. If you want to run a 225 or JR sport servo on Rudder or Throttle control, at least when it fails, its most likely not going to cost you the plane.

Take your pick, Hitec, Futaba, or JR, the better servos are all fine. The Less than $30 servos will eventually fail, or not control the plane with the authority or precision these planes demand.

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RE: Spektrum users - 8/11/2007 8:32 PM   
tflynn


 

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Status: offline 		Since this post started about the AR6200. That is the receiver that I used in Q40 at the nats. It worked as good as the AR7000 and is quite a bit smaller. Only down side is the top loaded plugs. In some planes that will take up more room.

As for servos I have used the Futaba 3002's and the 9650's for many years. Over the last year I have been flying the JR 3421sa. Speed and centering is very important in a racer and the 3421sa has the tightest gear train out of all the servos I have tried. My opinion is that helps the centering.

We spend lots of money on the planes and engines it is worth to at least put a good servo on the aileron and elevator.

Travis

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RE: Spektrum users - 8/11/2007 8:58 PM   
s-10promod


 

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Status: offline 		Ok guys, I get the message I'll use high quality servos. Looking foward to using the AR6200 as well. Thanks everybody for all the advice!!

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RE: Spektrum users - 8/12/2007 12:31 AM   
djlyon



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quote:

ORIGINAL: luv to race
I always fought trim issues with those and it drove me nuts, they just never seemed to hold center very well and every morning before a race I had to test fly to re-trim the plane.

Randy Bridge



Exactly my experience with the 225 and half the time I couldn't tell if it was the servos or a problem between my ears. That's why I switched to 5245s. But the gears do wear but I've heard you can use the 225 nylon gears. But after you've done all that the price advantage is gone. Also with the 5245s if you stall them for just a couple of seconds they are toast with no smoke. I tried 5125s but the little metal gears in those really wear to fast.

Denis

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