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Hi-Performance and Sailplanes RC hotliners, electric pylon racers, F5B, F5D, sailplanes and gliders

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Old 03-16-2011, 08:37 AM   #1
B12
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Default Warmliner power train advice needed.

Hi all!

I am new to the electric powered planes. I have flown glow plug planes in my teens in the 80's and also AAA target drones in military in 1990 (those were quite fast ones with overpowered motor for hand launch in rough terrain). Currently I have a Hobbyking Fox EPO 2.3m electric glider but I want something faster and more powerful.

I received the Orion V3 ARF kit from Modellbau Lindinger in Austria so this is the airframe to be used.

It should be reasonably slippery with thin airfoil. No high end though but no high end needed or required. Reasonably good performance is wanted with effortless vertical climb.

I have one Turnigy Plush 80A ESC from 500 heli which will be used.

I also have several 2200mAh 3s and 2650mAh 6s lipos from 450 and 500 class helis which I also fly. There must be a very good reason for not to use the existing batteries. The frame fits single 6s or parallel 3s just fine.

I also have leftover Turnigy 3632-1500kv motor.

CC Ecalc with 10x6 prop gives something like 50A, 2300g static thrust and 117 km/h pitch speed. What kind of real world performance does this mean? Motor will overheat but will be used with short bursts only.

For more power I thought about turnigy 3648-850kv

Parallell 3s lipos with 14x10 prop gives 3400g thrust, 107km/h pitch speed and 60 amps.

6s lipo with 10x6 prop gives 3900g thrust, 145km/h pitch speed and 50 amps.

I have no idea if these numbers are correct but they are given by the eCalc. Motocalc gives less thrust but otherwise similar numbers.

What is expert opinion about these combos? Will the 6s setup rip the Orion apart? Turnigy 36xx fits the nose of the Orion just fine. On paper blue/red 3648 range beats other similar size Turnigy models (SK/TR) hands down. Budget combo is my goal so Kontronic & Co is definitely out of question.

Sorry for no links to products but:

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Old 03-16-2011, 09:58 AM   #2
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Hi B12 and Welcome to Wattflyers here is some info that i saved for a Hotliner, maybe it might be of use to you you just need a few more post to be able to post pics, the system helps to keep the Spammers out of here


ZIPPY Flightmax 2650mAh 5S1P 40C
http://www.hobbyking.com/hobbyking/s...idProduct=9949

Hobbyking SS Series 190-200A ESC
http://www.hobbyking.com/hobbyking/s...dProduct=14500

KD36-74-06XL 2800kv motor:
http://www.hobbyking.com/hobbyking/s...idProduct=6677

apc 6x5.5

2900 watts w/ a 6x4 and 170amps! all for $86.69! 179 mph pitch speed

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 03-16-2011, 10:04 AM   #3
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and another set up from RC Foam Fighters 1600 Watts

  • Turnigy 3648 1450kv brushless motor (rated @ 1600watts) $19.89
  • HobbyKing 90-100amp esc $29.99
  • Turnigy 3-5amp ubec (rated for 2-5 cell LiPo) $7.83
  • Zippy Flightmax 2200mAh 5S1P 40C LiPo Battery $32.17
  • Total cost (89.88)
http://rcfoamfighters.com/blog/?cate...roduct-reviews

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 03-16-2011, 10:10 AM   #4
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Also look at the 100 MPH club on the 1st page post #1 there it shows what others pilots have used as far as power systems to go fast

http://www.wattflyer.com/forums/showthread.php?t=26852

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 03-16-2011, 10:33 AM   #5
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1. you can use your 80 amp ESC
2. your 3648-850kv motor is only rated for a 3 cell lipo max.
3. the 6cell 2650mah can be used
4. your 3632-1500kv is only rated for a 3 cell lipo max.
5. the 3648-1450kv motor is rated for a 6cell, you might want to Buy that motor. http://www.hobbyking.com/hobbyking/s...idProduct=8485
6. use a UBEC dont rely on the bec in the ESC. http://www.allerc.com/castle-creatio...ak-p-3219.html
7. get a wattmeter, its a must have, you will need it big time to check and save your power system http://www.hobbyking.com/hobbyking/s...dProduct=10080
8. use a 7x5 APC prop with 6 cells and the 3648-1450 KV motor, this will draw 90 amps, use in short wot burst with your 80 amp Esc. http://www.allerc.com/apc-7-x-5-thin...ler-p-508.html

22 volts x 1450KV = 31900 RPM + 7 pitch prop= 151 MPH prop pitch speed
http://www.rcpro.org/rccalc/PitchSpeed.aspx

Hope that helps, Chellie

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 03-16-2011, 10:50 AM   #6
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Originally Posted by CHELLIE View Post
1. you can use your 80 amp ESC
2. your 3648-850kv motor is only rated for a 3 cell lipo max.

4. your 3632-1500kv is only rated for a 3 cell lipo max.
Thanks for the reply!

2. That is an error in HK specs. The original data from motor manufacturer states 3-6s lipo. On the other hand performance numbers with 6s & 10x6 are not that much better from 3s with 14x10. Plus the 2650 6s battery is HUGE and heavy compared to two 2200 3s's. I am leaning towards 3s setup for starters. It would be easy to upgrade to 6s by swapping the battery and prop blades only.

3. The plan was to use two parallel 3s lipos and 10x6 folding prop

Anyway I am not after the world speed record just some entertaining performance for fun flying moments.
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Old 03-16-2011, 11:56 AM   #7
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Originally Posted by B12 View Post
Thanks for the reply!

2. That is an error in HK specs. The original data from motor manufacturer states 3-6s lipo. On the other hand performance numbers with 6s & 10x6 are not that much better from 3s with 14x10. Plus the 2650 6s battery is HUGE and heavy compared to two 2200 3s's. I am leaning towards 3s setup for starters. It would be easy to upgrade to 6s by swapping the battery and prop blades only.

3. The plan was to use two parallel 3s lipos and 10x6 folding prop

Anyway I am not after the world speed record just some entertaining performance for fun flying moments.
your right, i had to do some searching

http://www.electriflite.co.uk/store/...t3648-850.html
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Turnigy 3648 Brushless Motor 850kv

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Availability: In stock.
27.65

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For 1500~2500g airplane & 500 size helicopter.


Specification


RPM/V850Number of cells3~6 LiPolyResistance0.0185 0hmsNo Load Current2.8AMax. efficiency current45~50AMax. Amps55A/20SSize51mm x 37mm, 70mm(with shaft)Weight136gShaft diameter5mmRecommended Prop Size11"~15"Recommended for Model Weight1800~2500g

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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