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500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 07-11-2008, 02:28 AM   #1
ipjodan
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Default Hitec HS-5245-MG for cyclic

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
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Old 07-11-2008, 04:07 AM   #2
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From what I hear you won't be replacing gears, but cases. I'm not sure thats the upgrade you're looking for.
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Old 07-11-2008, 04:57 AM   #3
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Quote:
Originally Posted by ipjodan View Post
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
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Old 07-11-2008, 06:16 AM   #4
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You can get new cases at http://flying-hobby.com/catalog/product_info.php?products_id=2953 for 3.70$ each.

I got two, just in case...
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Old 07-11-2008, 06:40 AM   #5
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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?
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Old 07-11-2008, 06:47 AM   #6
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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.

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Old 07-11-2008, 06:59 AM   #7
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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.
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Old 07-11-2008, 07:19 AM   #8
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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.
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Old 07-11-2008, 07:32 AM   #9
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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.
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Old 07-11-2008, 07:37 AM   #10
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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
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Old 07-11-2008, 07:46 AM   #11
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http://www.hobbycity.com/hobbycity/s...idProduct=6756

best of both worlds can highly recommend them
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Old 07-11-2008, 07:48 AM   #12
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or you get the same effect the expensive way and buy 9650s and replace with these metal gears http://www.hobbycity.com/hobbycity/s...idProduct=6757
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Old 07-11-2008, 07:58 AM   #13
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the mks come out a slightly faster speed i believe
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Old 07-11-2008, 08:34 AM   #14
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Quote:
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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.

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
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Old 07-11-2008, 08:49 AM   #15
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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.
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Old 07-11-2008, 09:00 AM   #16
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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!

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Old 07-11-2008, 10:52 AM   #17
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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.
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Old 07-11-2008, 12:19 PM   #18
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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.
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Old 07-11-2008, 12:29 PM   #19
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Never mind, I see RC Hover has them for $85 each. Shouldn't these prices be going down?!
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Old 07-11-2008, 12:37 PM   #20
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$10 more than a z3650 just because the label is different. .....and it is now an "air" verses "surface" servo.

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