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I'm building the TopRC F9F Cougar

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Old 11-05-2018, 04:55 PM
  #101  
horsefeetky
 
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after maiden flight with the 100n engine you may want to detune it in the ecu with high rpm limited lower than full. this will make your throttle easier to control it is hard to fly a turbine at 85% and repeat that setting on the sticks

piggy back tanks are always better if you can do it and the bottom one drains last..
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Old 11-08-2018, 02:33 PM
  #102  
Marguet28
 
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I would like to buy a Cougar and put Jetmunt 70XBL (250 Gr less than the 80 jetmunt), very light turbine with low consumption.
I am afraid about having not enough power to take of from grass,
What s your opinion?
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Old 11-08-2018, 02:48 PM
  #103  
rhklenke
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Originally Posted by Marguet28 View Post
I would like to buy a Cougar and put Jetmunt 70XBL (250 Gr less than the 80 jetmunt), very light turbine with low consumption.
I am afraid about having not enough power to take of from grass,
What s your opinion?
I have a K-85G2 in mine and I'm off the grass in about 150'. Now with the old JetCat P-60 in there, I'm not sure it would have gotten off the grass at all...

Bob

Last edited by rhklenke; 11-09-2018 at 08:09 AM.
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Old 11-08-2018, 02:51 PM
  #104  
Marguet28
 
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The jetmunt 70 has more trust and are lighter than the jetcat 60se but far away from your K85.....
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Old 11-09-2018, 08:12 AM
  #105  
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Originally Posted by Marguet28 View Post
The jetmunt 70 has more trust and are lighter than the jetcat 60se but far away from your K85.....
So the P-60 is 13 lbs of thrust (on a *good day*) and the K-85 is 18.74 lbs.

The JetsMunt 70 is 15.8 lbs - almost exactly halfway between the P-60 and the K-85. The K-85 is really more than the Cougar needs, but it is very handy off of grass. I'd bet that the JetsMunt 70 would be good off of grass in the Cougar as well.

Bob
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Old 11-09-2018, 08:06 PM
  #106  
bruff
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Here is the video of the maiden of my 2nd TopRCModel F9F Cougar. Got talked into selling my 1st one.
Bob
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Old 11-10-2018, 12:04 AM
  #107  
Marguet28
 
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Thank you bob for your answer. My concern is more also about noise. I decided to go with the jetmunt 70 as it should be less noisy than a brand 80 or kingtech 85....
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