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ipjodan
07-11-2008, 02:28 AM
Hi all,

Im researching for a 500 build (yeah baby) I was fed up with replacing the gears in my HS-56's in my 450 so i went for the HS-65-MG and have never had to change gears yet. Are the 5245 what im looking for for the 500? I fancied the 9650 but like the price and MG of the 5245

Thanks

Laurens
07-11-2008, 04:07 AM
From what I hear you won't be replacing gears, but cases. I'm not sure thats the upgrade you're looking for.

psindrup
07-11-2008, 04:57 AM
Hi all,

Im researching for a 500 build (yeah baby) I was fed up with replacing the gears in my HS-56's in my 450 so i went for the HS-65-MG and have never had to change gears yet. Are the 5245 what im looking for for the 500? I fancied the 9650 but like the price and MG of the 5245

Thanks

If you use the 5245MG, just don't use the blue metal arms that comes with them. They will send all the "crash force" directly into the servo, and break the case instead.

Peter

perfeet
07-11-2008, 06:16 AM
You can get new cases at http://flying-hobby.com/catalog/product_info.php?products_id=2953 (http://www.flying-hobby.com) for 3.70$ each.

I got two, just in case...

RZ350Freak
07-11-2008, 06:40 AM
I read someplace, can't remember where now, that hitech fixed this issue with the week top servo cases. Anyone know if this is actually true?

psindrup
07-11-2008, 06:47 AM
I read someplace, can't remember where now, that hitech fixed this issue with the week top servo cases. Anyone know if this is actually true?


They made a "fix", but according to actual user reports it did not solve the issue.

Peter

warpspeed
07-11-2008, 06:59 AM
Yes, I can confirm that. The new versions still break exactly at the same spot as the old.
Switching to plastic arms didn't help, either.
Save yourself the frustration and go with the 9650's. Or HS82MG's.

xahhax
07-11-2008, 07:19 AM
they may sell cases, but in case you actually have not bought the servos yet, go for something else than the 5245...i deeply regret this choice.

Socal500
07-11-2008, 07:32 AM
Just stay away from the 5245. Even if the case did not break, the servo itself is not that great. There are better choices. Not using the metal arm will not save the case unless you weaken the plastic arm so your sure it breaks first. That would be a trial and error process and just hope the error does not happen in flight during a hard 3D manuever :)

9650 is a good choice and convert to metal gear if you can find them. JR makes a metal gear servo. Priced higher but probably worth it in the long run, especially if you want a drop in solution.

nickolai
07-11-2008, 07:37 AM
if you drill thru the embossment that breaks with a 1mm bit and replace the shaft with a longer piece of music wire so it sticks out of the case a mm or so, it solves the case problem. i have crashed 3 times since i did the mod and i have yet to break a case

Skint Eastwood
07-11-2008, 07:46 AM
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6756

best of both worlds can highly recommend them

Skint Eastwood
07-11-2008, 07:48 AM
or you get the same effect the expensive way and buy 9650s and replace with these metal gears http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6757

Skint Eastwood
07-11-2008, 07:58 AM
the mks come out a slightly faster speed i believe

psindrup
07-11-2008, 08:34 AM
JNot using the metal arm will not save the case unless you weaken the plastic arm so your sure it breaks first.

How can you tell? Have you tried the plastic arms and crashed since?

I replaced the "bling" blue metal arms with the tiny black arms that comes with the T-500 kit before my first crash, and all 3 servos and arms survived without a scratch. :thumbup:

Of course I can not say if they would have broken with the metal arms. I am only saying that it is possible to crash the 5245 servos without breaking the servo casings.

Peter

RZ350Freak
07-11-2008, 08:49 AM
Too late for me, I bought 3 of them.

My issue, I think, is that they don't seem to move at the same speed. When I do full pitch pumping the heli starts to veer off in one direction. Even if I have it in a fast piro and start full neg to pos pitch pumping it will still lean to one side right after I start to come back up from -12.

I am relatively new though so this could be my set up for all I know but it bothers me for sure.

Scotty T
07-11-2008, 09:00 AM
I came up with the perfect solution for this...

I was sitting at my engineering bench, drawing, testing, breaking, stress tests, and doing many scientific experiement with these little units.

The conclusion.....

Don't crash!

:YeaBaby:

terrabit
07-11-2008, 10:52 AM
I just bought a set of JR 3517 MG's. These are going to be the midsize servo of choice. .09 sec/51 oz/in @6v, with MG gears.

They're spendy but, after paying for a set of 5245's and several replacement cases, I'll gamble that they're worth it.

I've never had anything but good experiences with JR products and they offer a 3 year warrantee.

You can get them at http://www.rchobbysports.com/ in Seattle, WA. Also the guys down there are very helpful answering questions.

ryem3
07-11-2008, 12:19 PM
Which servo is that? I don't find a JR 3517 anywhere. I see a 8317 heli servo for $100 each (!), but these look pretty big for a 500. The 3650's seem to be a popular choice, but they are $75.

ryem3
07-11-2008, 12:29 PM
Never mind, I see RC Hover has them for $85 each. Shouldn't these prices be going down?!

Ultraviolet
07-11-2008, 12:37 PM
$10 more than a z3650 just because the label is different. .....and it is now an "air" verses "surface" servo.

:confused:

ualdrivr
07-11-2008, 12:59 PM
I have Futaba 9650 all around and like them a lot. Lots of torque and at 6.0 Volts only 0.03/sec slower than 9257s. The only problem right now is that no one has replacement gear sets in stock. End of July I hear.

:cheers
Panos

snjbird
07-12-2008, 05:54 AM
How much is a set of gears for the 9650? Did I hear correct you can get cases for the 5245 for less than 5 bucks? OK I have not changed any gears or other wise on my 500 yet because Iíve been really lucky so far, but donít you have to take the servo out of the frame to change the gears? So what is the big deal about changing the case? I mean you crashed right? Then you would have to change gears on a 9650 because you hit the deck while trying not to? And that means that a servo or two would normally be stripped? Is it that much harder to change a case? Iím asking because I donít know?

warpspeed
07-12-2008, 07:14 AM
It's not difficult to replace the case, but it takes more time to do and can be a fiddly process to get everything lined up and stuffed back in the way it all should be. Gears just drop right in and you're back in business.

Something I've asked about before, but have never received a satisfactory answer to, is just how much torque do we need anyway?
UV mentioned z3650's earlier, which seem like a viable alternative. They're only down 9oz/in from the 5245's, but what's the threshold? Was 60oz/in enough to begin with, or was it marginal at best?

Or is it overkill?