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

From: John Slade

To: Rotary motors in aircraft

Sent: Monday, March 01, 2004 4:43 PM

Subject: [FlyRotary] Re: 13B smooth running issues

> John, I would tune using the air/fuel indicator.   

> I would establish an rpm say starting at 2000 and initially go up in 500 rpm stages.  ....

Thanks, Ed. This leads me to a question. I have a manual wastegate. Should I do this with it closed or open?

 

John, I would first tune the engine for NA or Non-boost operation (Waste Gate open) to make certain everything sets up correctly. If is easy to get into detonation if you are running boost and the fuel mixture is too lean whereas it is its difficult to hurt the engine operating NA.  Now if you have set it up correctly for NA then if you have the turbo version of the EC2 it should compensate automatically when under boost.  You might have to twik it with mixture while under boost but start out without boost.

 

 

On another note, I have a "push fit" hose barb that goes in a coolant hole on top of the engine. It seems a bit loose. Any suggestions as to how to make certain it doesn't come out?

 

Not certain exactly which coolant hole you are referring to.  Is this the one with the tube that feeds the heater?   But, if its an interference fit and is loose, you'll want to take care of that rather than risk having a coolant leak.  No knowing exactly what your hose barb is made of  -its hard to advise.  However, here is a make shift fix assuming its the coolant tube which sticks out of the block a couple of inches.  Take a section of hose that has a large enough inside diameter to fit over the metal tube AND your hose.  Then take a hose clamp and tighten it down around the tube after placing this section over your hose and the tube.  Fit another one over the hose that has your barb.  That will hold your hose and bar in position as the new section of hose won't permit it to pull off the tube.

 

Oh - and one other thing - do you have an accumulator on you're vacuum / smog pump? I'm getting vacuum now - between 4 and 4 inches, but the needle is "jiggling" indicating an unsteady source. Do you get this? Does it settle down at higher rpm?

 

I don't have a accumulator but I do have an aircraft vaccum pressure regulator and no I do not get any jiggling.  Its possible that one of the lobes of the rotor is not functioning correctly (worn/broke etc) and that is why it is jiggling.

 

John Slade (time to put the prop on)