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Building Tips and technical articles. => 1/2 A building. => Topic started by: Larry Renger on June 15, 2008, 04:20:48 PM

Title: Brodak .049 Mk 1 on Sky Sport - progress report
Post by: Larry Renger on June 15, 2008, 04:20:48 PM
I am currently flying the Nelson Head/Brodak 049 Mk 1 on my Sky Sport.  The prop is a C*x 5x3.  Performance was so hot on 45 ft lines, I have gone to 48 and will probably run out to 50 ft!  This is on 15% nitro 20% oil fuel.   Lap times are about 4.6 seconds.

On these long lines, I will have to de-tune the controls still further.  The wiggles show too much as the model has so much more room to fly than it actually needs to make the maneuvers.
Title: Re: Brodak .049 Mk 1 on Sky Sport - progress report
Post by: Bill Barber on June 15, 2008, 04:37:00 PM
      How does your Brodak compare to your AP Wasps ?
               
                    Bill
Title: Re: Brodak .049 Mk 1 on Sky Sport - progress report
Post by: Larry Renger on June 16, 2008, 09:18:42 AM
It is only the .049 while the Wasp is .061.  I am very pleased with the power and the Brodak and Wasp will probably become my standard engines in those two sizes.  I have 2 of each, and, barring crash damage, expect them to last a long time.  Certainly the performance of the modified Brodak is excellent.
Title: Re: Brodak .049 Mk 1 on Sky Sport - progress report
Post by: don Burke on June 17, 2008, 10:31:11 AM
Might have been covered before, but how does the MKII Brodak compare to the MKI?
Title: Re: Brodak .049 Mk 1 on Sky Sport - progress report
Post by: Larry Renger on June 17, 2008, 05:54:21 PM
It is hard to judge the Mk II because you are stuck with the stock plug.  I suppose it is fine for casual sport flying, but lacks the performance of competitive engines such as the Big Mig or Nelson Modified Mk I.