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Old 09-12-2014, 01:50 PM   #1
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Default Tian-sheng giant cessna 182

I`m having difficulty in choosing the correct prop for my foam model Cessna 182. It has a wing span of 1870 mm and a flying weight of 2600 grams. It`s powered by a 4 cell 3300mah lipo battery and the motor is a Turnigy aerodrive 3548-700kv brushless motor. I would appreciate if someone could advise on the correct size propeller.
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Old 09-12-2014, 01:55 PM   #2
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Hobby King lists prop sizes for such motors.

You'll need diameter for thrust and not too high pitch as the 4 cell is going to be hardworked in such a model.

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Old 09-12-2014, 02:12 PM   #3
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Default tian-sheng giant cessna 182

I have endeavoured to find the recommended prop size on Hobbykings site but there is no info of prop size for that motor. I have used a 14x7 but I it`s taking a lot of amperage from the battery. Unfortunately, I`ve not got a Watt meter so I`m relying on someone`s experience !
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Old 09-12-2014, 03:27 PM   #4
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Read the reviews ?

https://www.hobbyking.com/hobbyking/...ner_Motor.html

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Old 09-12-2014, 03:40 PM   #5
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Thanks Nigel, I`ve been onto the Hobbyking site but those reviews are not related to the Giant Cessna. Plus the specifications of the motor are shown, but they don`t specify or recommend the prop size . Eric.
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Old 09-12-2014, 04:33 PM   #6
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I had that same motor. it's fine on an APC 14x7. I also ran it on a 15x7 but that did pull more than the recommended amps, it was still ok in short bursts though.
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Old 09-12-2014, 05:24 PM   #7
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Originally Posted by ericrw View Post
Thanks Nigel, I`ve been onto the Hobbyking site but those reviews are not related to the Giant Cessna. Plus the specifications of the motor are shown, but they don`t specify or recommend the prop size . Eric.
Problem with electrics are they are not like Glow or Gasoline jobs where you can load up a large prop ... electrics will just keep upping amp demand until finally it blows smoke !

So the reviews are actually more relevant than you give credit for. Basicvally you match prop to motor ... motor to model. Adjust pitch and diameter to get the same but relevant to the models flight envelope.

With 700KV on a 4S ... you need reasonable pitch due to the lowish revs.

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Old 09-13-2014, 09:08 AM   #8
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Tian-sheng giant cessna 182
I`m having difficulty in choosing the correct prop for my foam model Cessna 182. It has a wing span of 1870 mm and a flying weight of 2600 grams. It`s powered by a 4 cell 3300mah lipo battery and the motor is a Turnigy aerodrive 3548-700kv brushless motor. I would appreciate if someone could advise on the correct size propeller.



here is a similar motor in size and KV on a 4 cell lipo, a 12x6 prop should work fine, giving you about 88 oz of thrust. giving you almost a 1 to 1 power ratio, 2600 grams = 91.71 0z

http://www.headsuphobby.com/Emax-GT2...otor-G-825.htm

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Old 09-13-2014, 10:01 AM   #9
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Thanks Chellie and to all the other contributors to my request. I will give a 12x6 a go ! Eric.
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Old 09-13-2014, 10:38 AM   #10
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Originally Posted by ericrw View Post
Thanks Chellie and to all the other contributors to my request. I will give a 12x6 a go ! Eric.
Before I forget WELCOME TO WATTFLYERS Eric

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