Webra 1.45 problem too

[David Wartel]

Webra 1.45 problemMy problem is a little different:
Set-up: OS F plug, Grieve pipe (set to length on Piedmont site), Powermaster 15%, 16x10 APC prop. Have about 1.5 - 2 gallons of fuel through it so far, so it's still breaking in. Regular, not MC, carb.

After a lot of fiddling, I got the engine running very well on the ground. It would idle well and transition instantly after idling for 20-30 seconds. At takeoff the engine would surge and threaten to quit. Since the engine did this in a nose-up attitude, we ran it up to full throttle on the ground and held the nose up. The engine quit instantly.

I detached the fuel line to the carb and put the starter to it and fuel came out in irregular spurts. I don't know how the fuel should be coming out, like this or in a steady stream??

The few times I did get the plane to fly, the engine would bog down in about the 3rd quarter of the outside loop and nearly quit.

The fuel lines have been checked. The clunk is 1/4-1/2 inch from the back of  the tank. I have a brass tube installed in the pickup line so it can't fold forward.

I plan to disassemble the pump and check for debris, but would very much welcome any other suggestions. 

Thank you, Dave



----- Original Message ----- 
  From: Bob Pastorello 
  To: discussion at nsrca.org 
  Sent: Saturday, July 24, 2004 4:40 PM
  Subject: Re: Webra 1.45 problem


  Make sure your clunk inside the tank isn't tangling up on the vent line, or touching the back of the tank, OR that there's a hole in the fuel pickup line where it goes on the tube in the stopper.....any of those would cause a time-into-flight failure...

  Bob Pastorello
  rcaerobob at cox.net
  www.rcaerobats.net


    ----- Original Message ----- 
    From: Gordon Anderson 
    To: discussion at nsrca.org 
    Sent: Saturday, July 24, 2004 3:37 PM
    Subject: Webra 1.45 problem


    I'm having a problem with my Webra 1.45 and I hope someone can help me out. I have a new Hydeout (thanks to the guys that gave me the control throw advice!)  with a new Webra 1.45. Below are the details on the motor setup:

    Prop: APC 17x2 
    Fuel: Magnum #1 
    Plug: OS #8 
    Pipe: Greves 
    Mount: Hyde type soft mount and nose ring 
    Tank: Tetra 20oz, on CG of model 
    I have about 2/3 of a gallon of fuel run through the motor, this Webra uses the regular carb with the high speed and low speed needles.

    The problem is the motor dies when I roll from inverted to upright. This happens mostly after I have been at idle for a while. I'm flying the advanced routine and it dies during the roll out on the bunt and the bottom of the double I even the slow roll. I have never made it more than about 3 minutes into a flight.

    It seems to run fine on the down lines at idle, like in the stall turns and the outside square loop. 
    When it dies it sounds like someone pulled the fuel line off the engine, it just un winds. We tried leaning the low speed needle, replaced the tank internal fuel line to the clunk.

    Any advice? 

    --Gordon 
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