Ever heard of larger servos in a 250?

[B2TheEYo]

So, no one scold me or think I'm some whack job, just curious. We all know the 250 accepts 9G servos (one of the ways of describing them), the same ones we toss in our common 450's. Question is, anyone ever heard or seen bigger servos used?

Look at this as "building up the momentum" or market research...

May be useless, maybe overkill, nonetheless... It'd be unique.

[heli-on]

Sub-micro is what is used in the 250 & 450. You'd be faced with enough of a challenge trying to fit micro-sized in a 450. Therefore, it'd probably next to impossible to fit anything larger in a 250. Have you ever seen how little amount of space there is between the motor pinion and the lower servo? Not sure why you're asking this question. If sub-micro works well enough in a 450, why would a 250 need larger servos?!?!?!?!

[B2TheEYo]

Yup, quiet aware on the size challenges and the servos being more the adequate for the job, worked with so many 450's, where I started at, this is my first 250.

More or less was just curious if I actually just did a first or if this has been done before is all. Dumb founding as to why, but hey, when the opportunity strikes - right?

I just obtained my 250, and have all the electronics for her, besides some cyclic servos. I'm in a bit of a finacial slump with xmas being day(s) away among the crappie economy, so blowing $90 on three GOOD servos isn't a option for the time being (I'm a do-it-right kinda guy with electronics, I don't like to use "value" equipment). Since I have a whole new upgraded carbon set coming, which is thicker than the factory carbon, I decided to try out a little idea I had in the back of my head. I have two spare sets of high-end cyclic servos for my 500 laying around, their identical to the same servos in 250's and 450's, just a bit bigger in length and depth.

So I did some modifications. Perfect fit turns out. No weight issues or power issues to be concerned about and the everything is still mechanically and structurally sound!

I'll be maddening her tomorrow and shall report back.

Crazy sure, but hell when you can save a wad of cash and have the fun of experimenting, why not?

If all works out, I'll be buying some carbon plates and copying the original top halfs into my 3D suites and modifying them for the larger servos and get them cut out at the flow-jet.

[heli-on]

[Mikej]

Sorry - can't help it, got to respond

Originally Posted by B2TheEYo

so blowing $90 on three GOOD servos isn't a option for the time being (I'm a do-it-right kinda guy with electronics, I don't like to use "value" equipment).

I'm not sure how you can claim to be a "do it right kinda guy" when you are suggesting using completely inappropriate servos

Originally Posted by B2TheEYo

I have two spare sets of high-end cyclic servos for my 500 laying around, their identical to the same servos in 250's and 450's, just a bit bigger in length and depth.

So identical except for being longer deeper and heavier

Originally Posted by B2TheEYo

So I did some modifications. Perfect fit turns out. No weight issues or power issues to be concerned about and the everything is still mechanically and structurally sound!

Is this on a 250 or a 450 - for a 250 low weight is key to getting good flights characteristics - with this much extra weight you would probably need the 2000maH battery that the guy in the other thread is using

As heli-on said

[B2TheEYo]

Mike, honestly not thrilled with your comments in some ways. I almost get the sense you posted to only poke fun at my writing that I did at 3AM, which is a bit of a buzz kill to be perfectly honest. So hold off on scrutinizing everything in such a literal way and read below so you understand a bit better.

Originally Posted by Mikej

I'm not sure how you can claim to be a "do it right kinda guy" when you are suggesting using completely inappropriate servos

Never seen a mod that was "by the book", somehow you forgot what the subject of this whole deal is? I am a do it right kinda guy, I don't believe in cheap electronics or shotty setup. Do it right the first time by buying quality not quantity.

Originally Posted by Mikej

So identical except for being longer deeper and heavier

If you've ever worked with a verity of servos you'll know plenty of them are very different in form-factors. IE, some are a very large bold rectangular shape, where as some are a more narrow rectangular shape. These servos are identical in form factor to the original ones, just marginally wider and deeper... Hence why I said the same "size" essentially, but very loosely put.

Maybe a picture might give you an idea of the point I'm trying to get across.....



These larger servos I'm using are only weighted 5g heavier than the HS-65MG's many others use in 250's and 450's. So weight is not an issue, especially when a Scorpion will be going under the hood soon.

Originally Posted by Mikej

Is this on a 250 or a 450 - for a 250 low weight is key to getting good flights characteristics - with this much extra weight you would probably need the 2000maH battery that the guy in the other thread is using

It's obviously a 250, why else would I post it here!

Something in that case might be a possibility, sure. Never said it wouldn't be, more or less I just asked everyone if this has been done to know if I'm the first crack-head or not. But hey this is all part of the "creative process", if it works, fantastic, if it doesn't, I'm not at a loss, at least I tried something different and had a good time doing it. Right?!

Having said that, the weight of the model is actually not all that heavy compared to those using Align nylon gear'd servos. We only have 15g's added to the whole model, that's less than the weight of all the CNC frame fittings and bottom tray majority of people commonly toss on and upgrade to and have zero problems flying with.

But, I'm heading out to dial her tail and cyclic in and maiden her, I'll report back on how it all goes and add pictures!

Merry Xmas guys!

[Mikej]

Too right I was poking fun Didn't mean to upset you though, all done in fun.

I have HS-82s on my 500 and know how big they are - I just don't get how things can be identical but different in a number of significant ways.

Good luck with it - looking forward to seeing the pics.

Cheers,
Mike.

[RyuuChi]

Originally Posted by heli-on

Sub-micro is what is used in the 250 & 450. You'd be faced with enough of a challenge trying to fit micro-sized in a 450. Therefore, it'd probably next to impossible to fit anything larger in a 250. Have you ever seen how little amount of space there is between the motor pinion and the lower servo? Not sure why you're asking this question. If sub-micro works well enough in a 450, why would a 250 need larger servos?!?!?!?!

I'm not trying to nit-pick, but based on the way most sites (well, readyheli anyhow) list their servos by size, the hs-65 (recommended servo for the 250) is classified as as a micro and servos the size of the s9257 are listed as mini and the 9254 as full sized... is there some way that this is wrong??


also, nice build. definately overkill and may affect the flight characteristics a bit, but at least its a clean looking install. maybe i'd recommend trying to find a way to stabilize the front of the front cyclic servos though.