[AlaskaRC] Anyone good tuning an engine

TR rocket at acsalaska.net
Fri Sep 11 02:15:57 AKDT 2009


Hi Nathan,

I've had engines exhibit what you describe when I was running on bad fuel. Started fine, everything seemed good but on throttling up, it would die. May be worth a try.

Tom 
  ----- Original Message ----- 
  From: Nathan Stanfield 
  To: ARCS mailing list 
  Sent: Thursday, September 10, 2009 8:08 PM
  Subject: Re: [AlaskaRC] Anyone good tuning an engine


        Ray,
        Thanks for the help! I am going to try plugging the pipe tonight and I will test it out Sunday. I was so happy today when it flew, but then terrified when the engine died, but the dead stick landing was one of the best landings I have ever made. Too bad I had to power to go around and land again. I will be out at Elmendorf Sunday if anyone wants to come out and fly with me. 

        -------Original Message-------

        From: ray hoffman
        Date: 9/10/2009 5:50:45 PM
        To: ARCS mailing list
        Subject: Re: [AlaskaRC] Anyone good tuning an engine

              Hi Nathan, I had the same problem, when I put Pitts mufflers on my B-17. I had problems with all the engines running right. So I did just what you're thinking. I cut off one pipe, leaving maybe a 1/2 inch. I plugged it with a wood dowel.Just be sure to drill a very small hole in the center of dowel, so oil can drain. If you have trouble with afterwords, let me know, and I'll help you tune it personally. Hope I helped.

              Ray

              --- On Thu, 9/10/09, Nathan Stanfield <NathanStanfield at hotmail.com> wrote:


              From: Nathan Stanfield <NathanStanfield at hotmail.com>
              Subject: [AlaskaRC] Anyone good tuning an engine
              To: alaskarc at lists.alaskarc.org
              Date: Thursday, September 10, 2009, 3:41 PM


                    Hello all, I am a new member of the club and just got to Alaska a month ago.
                    I have an OS .55 with at Pitts muffler that is giving me problems. It runs well on the stand but dies as soon as I try to throttle up to take off.  I have tuned it the best I can, its just rich enough so that it does not lose power when pointing strait up, but I think with the pitts its not getting enough back pressure and is running rich to keep it going when pointed up. I think if I pinch off one of the two exhaust outlets it might help??? Anyone willing to come out to Elmendorf field on Sunday to help me with it? Or does anyone have any ideas about what I could do to fix this?
                    Thanks,
                    Nathan  
                           
                   


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