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80'' CL-415 CANADAIR prop problems

Old 01-11-2009, 09:36 AM
  #1  
pappy_69
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Default 80'' CL-415 CANADAIR prop problems

Hi everybody !!
I need the electrics guru's advice!

I am building a CL-415 Canadair (waterbomber) and i decided to go Electric.
To power up the system i got 2 Dymond 4260 (600kVa) and the Dymond 60 Plus ESC's.Because of the scale look i would like to use 4 blade props so i got 2 10 x 6 x 4blades.
I installed on one motor and did a test with an analyzer (watt's up from lindinger.au).
(Every reading supposed to be multiplied by 2 since its a 2 engine model).
To my surprise the analyzer showed me only 29Amps and 620Watts.
The final models weight will be 7,5kgr or 16,5lb.
I know a rule of thumps that says that to fly scale and safe in the same time you need something like
200 to 240Watts/kgr or 90W/lb.
The Batteries are 2x3 cell in series of 5000mAh each.

I have a question:

Does anybody knows if 11x6 will do the work based on real experience and NOT a power calculator program?
Calculator showed me 38amps but the real readings are obviously far out!!

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Old 01-11-2009, 09:51 AM
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stinkweed007
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Wow, that sounds like a cool plane!! definately an eyefull of numbers (well out of my league) but Im sure then the US wakes up this morning, you will get all the help you need. SInce this is a waterbomber, do you plan on carying any payload? I guess the overall weight might play a part in a prop/powerplant recomendation. also what are your projected dimensions?

I want to see this thing when you get it together!

Welcome to WattFlyer!
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Old 01-11-2009, 10:33 AM
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pappy_69
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Thank you very much!!

It realy worries me the prop issue!!!
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Old 01-11-2009, 10:33 AM
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pappy_69
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I know i can put some 2 blades on but it will look realy silly!!!
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Old 01-11-2009, 10:34 AM
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pappy_69
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You can see the project on

http://www.aeromodelismos.gr/index.p...ic,1925.0.html

Its also in english(up to apoint!!) so you can follow
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Old 02-14-2009, 11:20 AM
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ENUT
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I suspect you need more voltage.This airplane is a twin so each motor should produce about 850 watts.What is the motors max working amp's?You will most likely need to go 4s or 5s packs. Good luck,
ENUT
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