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Old Sep 22, 2009, 12:30 PM
JettPilot's Avatar
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What do you guys think of Hyperoin Motros, and Castle Creations Speed Controllers ???

I am building an electric sailplane, and I will be using a 5000 mAH 4 cell pack for power, being able to cruise about 45 minutes is important so this size is set in stone. I also need to climb very quickly for soaring when conditions permit so I need to have motor that will easily use 600 watts of power on a long climb without overheating. I am looking at a Hyperoin motor with a Castle creations speed controller, what do you guys think of these brands, are they very good quaity ? Also, what size motor would I need, the glider is in the picture below, it will be a bit heavy with the big battery.

http://www.hobbycity.com/hobbycity/s...__(99.6in)_ARF

Any suggestions will be appreciated.

Mike
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Old Sep 22, 2009, 12:58 PM
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Why do you say you need at least 600 watts? How much does that plane weigh?
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Old Sep 22, 2009, 02:33 PM
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According to the link: 38 oz - 49 oz approx. (I'm guessing that's based on what you put into it).

Castle Creations and Hyperion are both well known reliable brands. There should be no problem with either one.

Try using a motor calc like this one: http://www.adamone.rchomepage.com/calc_motor.htm
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Old Sep 22, 2009, 03:12 PM
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Reading the reviews the ready to fly weight come out at 68oz.
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Old Sep 22, 2009, 06:48 PM
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cjb ... you read the wrong number... the 38-49 was wing-loading in g/dm2.
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Old Sep 22, 2009, 07:24 PM
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How's this?

According to WebOCalc, you don't need anywhere near 600 watts to get a greater than 1:1 thrust to weight ratio.

Using an average, run of the mill, 75% efficient outrunner of 500kV and only pulling about 25 amps static current, we should be able to develop about 61 ounces of thrust on your 49 ounce plane.

The power in will only be about 367 watts on an AeroNaut 14x10 folder prop.

Now, I am assuming that the 14x10 AeroNaut has the same prop constants as an APC 14x10E prop, so Phil (Dr Kiwi) may have to chime in and tell us the actual prop constants. If he knows them, then we can fine tune the results to reflect the actual prop constants.

All calculations were performed using WebOCalc 1.5 written by RCG member FliesLikeABeagle

Chuck
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Old Sep 22, 2009, 08:21 PM
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I think we need to know the correct AUW: here is one guy's cumulative component weights... comes out to be 2178g = 76.7oz!

alex4orly
|
I was puzzled with what the web site says about the expected weight 1,400 . When I finished assembly and put it all on my scale it comes up to a total of 2,178 grams, this is far off the suggested weight on the web site. details:

Fuselage all up with a 3S 3300 mah battery = 1,264
canopy = 54
right wing = 308
left wing = 316
stainless steel tube = 236

Waiting for a carbon fibre replacement, will reduce by 200 g, still too heavy.


Another guy got 1438g for the bare components to which he needed to add ~160g motor, 25g prop etc, 60g ESC, 425g battery... so he's up over 2100g too.
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Old Sep 22, 2009, 08:36 PM
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Quote:
Originally Posted by Dr Kiwi
I think we need to know the correct AUW: here is one guy's cumulative component weights... comes out to be 2178g = 76.7oz!


alex4orly
|
I was puzzled with what the web site says about the expected weight 1,400 . When I finished assembly and put it all on my scale it comes up to a total of 2,178 grams, this is far off the suggested weight on the web site. details:

Fuselage all up with a 3S 3300 mah battery = 1,264
canopy = 54
right wing = 308
left wing = 316
stainless steel tube = 236

Waiting for a carbon fibre replacement, will reduce by 200 g, still too heavy.


Another guy got 1438g for the bare components to which he needed to add ~160g motor, 25g prop etc, 60g ESC, 425g battery... so he's up over 2100g too.
Holy Cow!

Makes me glad I picked the 2 meter ParkZone Radian with the sweet stock ParkZone 480 brushless and a 10x6 AeroNaut folder on a 3s Li-Po.

All up weight = 25 ounces, and will haul some serious tail up to altitude.

Chuck
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Old Sep 22, 2009, 08:40 PM
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Quote:
Originally Posted by Dr Kiwi
cjb ... you read the wrong number... the 38-49 was wing-loading in g/dm2.
But this is what it said:

Specification;
Wing Span: 2530mm (99.6inch)
Weight: 1,100 ~ 1400g <--- ~38 oz to ~49 oz
Length: 1170mm (46inch)
Wing Area: 28.5dm2
Wing Loading: 38~49g/dm2
Airfoil: HQ 3015


I guess their estimate is a bit off!
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Old Sep 22, 2009, 08:45 PM
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Quote:
Originally Posted by Dr Kiwi
I think we need to know the correct AUW: here is one guy's cumulative component weights... comes out to be 2178g = 76.7oz!
I agree, it would be best to pick the motor after plane is built, including servos, prop, battery, etc..

That weight is a way off from what the manufacturer shows and what others are actually getting...could make the motor you buy too small going by what the manufacturer shows as the finished weight...

Challenger413
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Old Sep 22, 2009, 09:00 PM
uhhh....this thing on?
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Long Island, NY USA
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I think castle creations makes some really good ESCs. the great thing is if you get the castle link you can update the firmware on the ESC. With some of my older ESC's...there has been more features added to the firmware over the years since when I first bought them.

Can also use it to program the ESC as well.
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Old Sep 22, 2009, 09:07 PM
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Some of the reviews are complaining that the suggested motor is a 35mm, yet guys are saying that the opening is only 32mm. Should make for an interesting fit...
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Old Sep 22, 2009, 09:29 PM
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As far as Hyperion motors and CC ESC's.

I have a Hyp. 2213/24 motor, but have never ran it. I have read that they are good motors, being in the middle range of standards.

I have (10) CC brushless ESC's and have had great luck with them. Had a CC-10 that lost its memory during a link up. Mailed it in and got a new one, not bad for the price of a stamp. Had a 4 year old CC-35 go bad and sent it in with $30.00 and got a new CC-35 a couple of weeks later. With the rest, I have never had any problems. I feel they are the best brand of ESC's sold.

Challenger413
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