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Yak 55 Profile build : batery assistance needed

Old 02-16-2007, 09:59 PM
  #1  
Skykid Baker
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Default Yak 55 Profile build : batery assistance needed

Hey guys I'm just about finished builing this Hyperion Yak 55 profile plane and I need some advice on battery types and placement.

It doesn't say the recommended mAH for a battery ....just says 2-3 cell li-po . I need to know what's the most I can go for good flight time but without adding too much weight. Im kind of a noob at li-po and I understand how they work...I just don't know how heavy/large certain mAH packs are.... Also would it be better to make a 2s2p pack out of smaller packs ? thanks in advance for info.


http://www.bmccars.com/upload/files/2/Yak.JPG
http://www.bmccars.com/upload/files/2/Yak%202.JPG
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Old 02-17-2007, 12:26 AM
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k-vette
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Chances are pretty good you'll probably want to go with a 3s for good 3d performance. If you're using of the suggested setups it looks like you'll be drawing 10 to 12 amps and full throttle. You'll want a battery that can handle at least that much current. For example, a 10c 1000 mah battery can discharge 10 amps continuosly, whereas a 20c can handle twice that. I think you'd be best off with just using one pack, no reason to combine them on something this size. How much flight time are you looking for?
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Old 02-17-2007, 05:00 AM
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Skykid Baker
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Yes thanks to some research I at least understand the C rating thing :P

Flight performance is more important for me than flight time right now....I want to be able to do some vertical action. Needs to be at least 5 minutes I guess I am usually reeady to land by then to give my eyes and neck a rest :P
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Old 02-17-2007, 10:46 PM
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QuietRCFly
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Hyperion recommends the 800 mAh 3S:
http://www.quietrcflying.com/Product...id=HP-LVX8003S

But you could also use their CL 950:
http://www.quietrcflying.com/Product...d=HP-LCL09503S

Sorry the 950 pic is of a 2S, but the item and price is for the 3S version.
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Old 02-18-2007, 06:44 PM
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Skykid Baker
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Thanks for those links ....the prices on those arent too bad..they come with balancing tabs ??? I will need to get a charger with balance capabilities : /
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Old 02-18-2007, 07:15 PM
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QuietRCFly
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Originally Posted by Skykid Baker View Post
....the prices on those arent too bad..they come with balancing tabs ??? I will need to get a charger with balance capabilities : /
Yes they come with balance taps. If you are a first time customer, you can also enter the promotional code, FIRST , at checkout to save 10% on your entire order. That offer will expire Feb. 28th.

Thanks!
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Old 02-22-2007, 11:54 PM
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Skykid Baker
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so anything over like 1350 mah is probly to big/heavy for my application right ???

I am about to purchase a li-po / charger/ and a couple props from quietflyingrc.com

where is that promo code for the discount ?
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Old 02-23-2007, 12:27 AM
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QuietRCFly
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Originally Posted by Skykid Baker View Post
so anything over like 1350 mah is probly to big/heavy for my application right ???

I am about to purchase a li-po / charger/ and a couple props from quietflyingrc.com

where is that promo code for the discount ?
Yes over 1350 is getting a little heavy. Discount codes are on the homepage, www.quietrcflying.com Probably if you are ordering under $200 worth of stuff, just use the code, FIRST , to save 10% if you are a first time buyer (or have not used that code before as it only works once per customer).

Thanks!
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Old 03-01-2007, 05:29 PM
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tbottom
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I just got done building the yak w/a frame fuselage. Whats the best way to mount the battery. I am running 2 servos so the middle is free. The battery is located about 1-2 inches behind the front wing spar. I was thinking a strip of velcro.
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Old 03-07-2007, 01:20 AM
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Flyingace451
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Anything from an 800 to a 1350. Personally I use 800's and I get plenty of flight time with that. Enough flight time for me anyways. Anything past a 1350 is way too heavy, and 1350's still are really pushing it.
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Old 03-09-2007, 01:09 AM
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tbottom
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got a 1320 thunderpower. Cut the pigtail and soldered on my cellpro adapter. I also am using the FMA DPM. Now i am worry free about my batteries. I placed the battery about 1/8" behind the first CF rod in the wing.
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