Happy New Year to all.

[Bill Pritchett]

Eric:
This is very interesting.  I have always ran YS motors, and have just recently started flying Webras..... when Merle Hyde suggested his "A" Mount, I bought it, but questioned the lack of a nose ring.....I haven't been able to tell a difference, but was interested in your findings.  
Thanks for the info!
Bill
  ----- Original Message ----- 
  From: Henderson,Eric 
  To: discussion at nsrca.org 
  Sent: Thursday, January 01, 2004 10:34 PM
  Subject: RE: Happy New Year to all.


  Bill,
         I have a video of a YS/hydemount combo on a test rig "snaking" a little as it spooled up to full rpm. Interestingly enough the spinner was holding its position pretty well and the rear of the engine was gently gyrating. 

  In the air the I have tried blipping the gas and a few other things with both types of engines. I was very interested  in seeing if the lack of nose ring would make any difference. I ran the Mintor 1.70 with and without a nose -ring. I could not tell any difference in flight behavior.

  What I did see was lower battery consumption without a nose-ring. I think that it was due to the lack of the engine touching the sides and passing on vibration near the cowl.

  A very loose nose-ring is probably a solution to catching extreme load gyrations and gyroscopic twisting of the prop disc on heading changes. We tend to have tight nose-rings that somewhat defeat the point of having a soft-mount in the first place. 

  Regards,

  Eric.



  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Bill Pritchett
  Sent: Thursday, January 01, 2004 8:37 PM
  To: discussion at nsrca.org
  Subject: Re: Happy New Year to all.


  Eric:
  Have you experienced any "searching" by these motors on this mount without a nose ring?
  Thanks
  Bill
    ----- Original Message ----- 
    From: Henderson,Eric 
    To: discussion at nsrca.org 
    Sent: Thursday, January 01, 2004 8:24 PM
    Subject: RE: Happy New Year to all.


    Nat, That's a big question. 

    Just got back to our hotel after a day at the beach - actually the flying field. My wife went shopping and I went flying. 181 is now my magic number of months that I have flown an RC plane at least once in a month. Feels good to get it done on 1/1/2004 and I just know that there is bound to be cold weather waiting for us up north.

    I am running with "A" type Hydemounts on all of my big (1.40-1.70) 2-c's. Some of which are actually stiffer than usual. Anything I have flown without an iso-mount has shown high frequency vibration damage such as horn-bolts snapping etc. With the big four-bangers we also had to deal with a lot of "shake" dampening as well. The 2-c's run a lot smoother and as such shake a lot less. So far I have found that 2-c's present less problems in the area of isolation. They are definitely smoother at full rpm. At very low rpm they will bump around as much as any other engine of that size.

    Hope that answers your question.

    Off to the new air and space museum in near Dulles VA tomorrow.

    Regards,

    Eric.


    -----Original Message-----
    From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Nat Penton
    Sent: Thursday, January 01, 2004 1:16 PM
    To: discussion at nsrca.org
    Subject: Re: Happy New Year to all.


    Eric you have flown far more airplanes than than most. I, for one, would appreciate your opinion regarding selection of motor mounts. Do 2 strokes present more problems in getting good top and bottom isolalation ?           Happy New Year - Nat Penton
      ----- Original Message ----- 
      From: Henderson,Eric 
      To: discussion at nsrca.org 
      Sent: Thursday, January 01, 2004 7:51 AM
      Subject: Happy New Year to all.


      Some predictions.

          Well, If you are reading this you made it into 2004. FAI pilots will be flying P-05 and maybe unknowns and F-05. Masters pilots will probably be flying their schedule for the last time. Intermediate pilots will still be exiting down-wind, but may get a snap to do in 2005. A lot depends upon how progressive our AMA committee sees our future.

          Two cycles will continue to be a force in pattern but the 4-c's will fight back with cubes!. Electric power will continue to tempt us in in a most tantalizingly expensive manner. New pattern plane designs will help us fly better and make it as hard as ever for judges to separate us. New servos will give us more rudder power and better resolution to amplify our skills and of course our errors.

          Most of all the weather will cooperate this year. We will practice in February in District-1. We will be ready for the Nationals. We will judge spins and snaps with consistency. More of us will attend contests and... "What's that noise? Oh,it's my hotel-wake-up call".... Must go flying to get my January flight in.


      HAPPY NEW YEAR EVERYONE!

      Eric.



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