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K&B Sportster .65 (target drone engine)

Old 02-29-2016, 10:50 AM
  #76  
sarpet
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Ma 12x6x3, modified head,j'en medium plug,10% nitro,-5°c 11300rpm.
Old 02-29-2016, 11:20 AM
  #77  
1QwkSport2.5r
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Now you're taking. Those numbers look good to me. I think I got 11,550rpm on a 2-blade 12x6, so that's right in line with a little more nitro and an extra blade.

How was the mess coming off the front crank bushing while running?
Old 02-29-2016, 11:57 AM
  #78  
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Not bad mess,muffler leaks,but idont use it in plane,ineed somekind in cowl muffler.
Maybe that, .61-90 size http://www.justengines.co.uk/acatalo...nes_Pitts.html
Old 02-29-2016, 01:49 PM
  #79  
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Originally Posted by särpet View Post
Not bad mess,muffler leaks,but idont use it in plane,ineed somekind in cowl muffler.
Maybe that, .61-90 size http://www.justengines.co.uk/acatalo...nes_Pitts.html
You will likely lose power if you use a different muffler on the Sportster engine. You could try it though.
Old 03-02-2016, 11:43 AM
  #80  
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Buhahaaaa!! Now iget good numbers.
10%nitro,20% castor,-5°c Ma 12x6x3 j'en medium plug,modified head and 'jen .60-90pitts style muffler with little porting job 11900rpm.
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Last edited by särpet; 03-02-2016 at 11:49 AM.
Old 03-02-2016, 01:37 PM
  #81  
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Nice! I'm surprised you picked up that much power! What did you do port work on - just the muffler itself?
Old 03-03-2016, 07:23 AM
  #82  
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Muffler inlet was bad shape and narrow.
Old 03-12-2016, 10:55 AM
  #83  
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Last 2 tanks today ,little rich mixture,nice warm and sunny day 11500rpm,Ma12x6x3.
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Old 02-23-2020, 06:21 PM
  #84  
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I have one of these engines I'd be willing to part with and its just like the nib version at the beginning of this thread. No number/size designation just the "G29065" on the mounting lug and then a "2" on the back plate. Its got the motor mount style back plate. Appears to have very little use on it if any. If I dont get any responses here I was thinking about putting it on Ebay but I'm in no hurry.

G29065 K&B

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