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Old May 13, 2011, 11:50 AM
Gonna need a bigger plane . .
FlopGun's Avatar
Kitsap County, WA, USA
Joined Jul 2007
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50cc servos

OK so I need 5 servos for the EF 88"

Anyone try these or heard about them?

http://www.allerc.com/hyperion-atlas...vo-p-5871.html

I'm probably going to get 7955tgs but these Hyperions look interesting. I'd consider the HD 9150s, but I really like the simplicity of 2s lipo hv setup.
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Old May 13, 2011, 12:07 PM
Huckfest or bust!
cryhavoc38's Avatar
United States, WA, Woodinville
Joined Mar 2007
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Quote:
Originally Posted by FlopGun View Post
OK so I need 5 servos for the EF 88"

Anyone try these or heard about them?

http://www.allerc.com/hyperion-atlas...vo-p-5871.html

I'm probably going to get 7955tgs but these Hyperions look interesting. I'd consider the HD 9150s, but I really like the simplicity of 2s lipo hv setup.
Here's the thing about the Hyperion servo's.

Note the "holding torque" versus "Dynamic Torque" difference.

These servo's will Hold their position very strongly, but have 50% less torque when moving.

Having said that

at 7.4v that servo has approx 670oz of holding torque and approx 335oz of dynamic torque.

Seems to be pretty darn good for a sub $50 servo.
AND they are programmable.
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Old May 13, 2011, 12:18 PM
Ride Blue
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United States, WA, Sammamish
Joined Aug 2006
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Quote:
Originally Posted by egaus View Post
I'm confused Jholen, what are all those switches and 2300 mAh LiFe batteries for? Why not just hard wire a BEC to the main battery?

Guys, no hard feelings here but it seems to me that if you want an electric plane, you should just buy one. Converting a gas airframe to electric just seems to be like starting with an unnecessary weight penalty and bunch of extra work.

Curious,

e
The switch is something that Cry convinced me to get.

The A123s are one of the most popular power systems that you'll find now in Giant Scale Planes. The benefits of using A123s are their high discharge characteristics, and that they can be directly plugged into your receiver, thereby eliminating BECs or regulators. The packs themselves are of similar weight to a regulator and two 2s 2200 Lipos setup. Is it overkill? Some might say so, but for me I'm ok with having more headroom.

If I was concerned about weight, I'm not, I could have used 2 x 1100 mAh A123s. The benefit of the switch as described by Cry is that I can easily turn off my plane with a flip of two switches rather than popping the canopy and unplugging packs, of which I'll be having to unplug my two 6s 5300 lipos anyways.

I like supporting Azhar, he has given me some great deals, and I've also inherited some great deals from Cry that were originally given to him from Azhar. I'm an Azhar guy for now. I enjoy driving out to his warehouse, and putting the bird directly into the back of my truck and not having to worry about shipping or any of that confusion. If you haven't bought from Azhar, it might be worth it to give him a call and see what price you can work out. I'm sure you won't be disappointed.

For the price that I got my Raven for, I'd be looking at $800 for a 50cc bird from 3DHS. Big difference.

Though you should really be talking to Cry or some folks over at FlyingGiants.com as I'm new to all this stuff. Learning as I go, which is probably why it is taking me so dang long to get her finished, but I'm enjoying the process so far. Learning a lot. Hopefully that answered your question, and no hard feelings
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Old May 13, 2011, 12:19 PM
Ride Blue
jholen's Avatar
United States, WA, Sammamish
Joined Aug 2006
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Go turnigys Flop! HV-767s baby! I thought about selling all my PowerHD's and 7955 to go with them, but already had everything installed. Maybe next time, lol, if the Wife/Budget allows.

400oz of torque, RAWR
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Old May 13, 2011, 05:35 PM
Gonna need a bigger plane . .
FlopGun's Avatar
Kitsap County, WA, USA
Joined Jul 2007
2,945 Posts
Quote:
Originally Posted by cryhavoc38 View Post
Here's the thing about the Hyperion servo's.

Note the "holding torque" versus "Dynamic Torque" difference.

These servo's will Hold their position very strongly, but have 50% less torque when moving.

Having said that

at 7.4v that servo has approx 670oz of holding torque and approx 335oz of dynamic torque.

Seems to be pretty darn good for a sub $50 servo.
AND they are programmable.

670? I think you forgot to do the 2nd unit calculation

670/2.54 cm/in = 263
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Old May 13, 2011, 06:03 PM
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Wa, state
Joined Oct 2009
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Quote:
Originally Posted by jholen View Post
Go turnigys Flop! HV-767s baby! I thought about selling all my PowerHD's and 7955 to go with them, but already had everything installed. Maybe next time, lol, if the Wife/Budget allows.

400oz of torque, RAWR
They look awesome, but you arent shaving much in the price range! Besides the fact that you couldn't sell them for much of anything. Not saying they aren't good, but they don't have the brand behind them.
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Old May 13, 2011, 06:13 PM
Huckfest or bust!
cryhavoc38's Avatar
United States, WA, Woodinville
Joined Mar 2007
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Quote:
Originally Posted by FlopGun View Post
670? I think you forgot to do the 2nd unit calculation

670/2.54 cm/in = 263
ah tricky hyperion putting cm/in after the spec.
you are correct.
that just means this $50 servo has 131oz of moving torque.
Not good for a 50cc class ship
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Old May 13, 2011, 06:14 PM
Huckfest or bust!
cryhavoc38's Avatar
United States, WA, Woodinville
Joined Mar 2007
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so much for flying after work.
friggen gale force winds!
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Old May 13, 2011, 06:15 PM
Gonna need a bigger plane . .
FlopGun's Avatar
Kitsap County, WA, USA
Joined Jul 2007
2,945 Posts
Good point, the 7955tgs have excellent resale value.
And there is no uncertainty in their performance.

Anyone care to translate Hyperions 'holding torque' to the other company's stall torque?

I'm going to guess those hyperions are right around 200oz?
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Old May 13, 2011, 09:57 PM
Huckfest or bust!
cryhavoc38's Avatar
United States, WA, Woodinville
Joined Mar 2007
8,056 Posts
embracing my inner geek, or "thats pretty cool"
Guess what Deanna said.
lol

40% pilot for the Raven

http://www.vimeo.com/23711810
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Old May 13, 2011, 11:37 PM
Ride Blue
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United States, WA, Sammamish
Joined Aug 2006
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Quote:
Originally Posted by michaelJH View Post
They look awesome, but you arent shaving much in the price range! Besides the fact that you couldn't sell them for much of anything. Not saying they aren't good, but they don't have the brand behind them.
I wasn't impressed with Hitec customer service, so have decided not to fly Hitec, including radios and servos - there are just other alternatives out there and so I'll take my business elsewhere. (Obviously anything that already has Hitec will keep it, just saying I'm not going to buy anything else from Hitec in the future)

Not saying anyone else has to follow that, just call it my own personal legalism lol
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Old May 13, 2011, 11:38 PM
Ride Blue
jholen's Avatar
United States, WA, Sammamish
Joined Aug 2006
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Quote:
Originally Posted by cryhavoc38 View Post
embracing my inner geek, or "thats pretty cool"
Guess what Deanna said.
lol

40% pilot for the Raven

http://www.vimeo.com/23711810
lol dork
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Old May 13, 2011, 11:46 PM
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Quote:
Originally Posted by jholen View Post
I wasn't impressed with Hitec customer service, so have decided not to fly Hitec, including radios and servos - there are just other alternatives out there and so I'll take my business elsewhere. (Obviously anything that already has Hitec will keep it, just saying I'm not going to buy anything else from Hitec in the future)

Not saying anyone else has to follow that, just call it my own personal legalism lol
But I have ... Oh - OK, thanks!
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Old May 14, 2011, 12:05 PM
Quadrophenia
egaus's Avatar
Seattle
Joined Mar 2009
915 Posts
Hmm.. I've never had to deal w/ Hitec customer service, because I've yet to have a problem with any of their products (servos). Turnigy on the other hand.. Wouldn't use their stuff for anything other than foamies.

Another great day, spoiled by wind!

CSRC motors are good: http://www.commonsenserc.com/product...roducts_id=422

e
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Last edited by egaus; May 14, 2011 at 12:42 PM.
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Old May 14, 2011, 04:10 PM
Gonna need a bigger plane . .
FlopGun's Avatar
Kitsap County, WA, USA
Joined Jul 2007
2,945 Posts
Quote:
Originally Posted by cryhavoc38 View Post
embracing my inner geek, or "thats pretty cool"
Guess what Deanna said.
lol

40% pilot for the Raven

http://www.vimeo.com/23711810
pretty cool Chuck, but I can't help but notice the girly man 1-wood in your golf bag.

I expected a giant scale Big Bertha.
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