Recent content by nrpetersen

It would be interesting to know how deep those corrosion patterns go. IOW how much oversize would the holes have to be reamed or drilled to clean up? Strictly airboat stuff now.

Not ready for solo.

Did Corona pass E bound in a 150hp 172M @ 14,500. Mixture control seemed a little squirrely/touchy was the only thing I noticed.

Possibly a metal defect in the original forged blank - that may be common in McCauley props. From a hub fatigue standpoint the numbers stamped seem a more critical source. Maybe look at some other McCauley props? Never heard of hub failures in fixed pitch props, only blade failures from...

It is important to recognize up front when special measures must be taken to remove an uncooperative screw, including removing paint or any grease, and the quality of the driver. There comes a time to call in an experienced motorcycle mechanic. In general, they will look for unworn...

Possibly there are few if any regulations regarding seaplanes on that specific lake. But that lake isn't really big enough to operate a 206 (especially) more than once in an emergency without raising real noise and safety issues with the neighbors. There will be a thousand reasons raised why not.

Maybe sheet plastic films have similar optical properties to hydrocarbon fuels. That might make them absolutely disappear until the tank is drained?

If stopped in the air, will a typical stopped Rotax engine installation crank itself for restart from just diving airspeed via the prop torque?

If you still suspect the linkage, You must ground test it only by first defeating that unobvious strut assembly feature that forcibly hard-centers the nosewheel on full strut extension after liftoff. This automatically centers the nose wheel on initial touchdown to help keep you out of the...

The other part of plug removal ritual is to first remove the bottom plug, then only remove the top plug when the piston is at TDCenter when both valves are closed. Seems to me that the potential contamination crud around the piston top ring groove could be an order of magnitude more than might...

The way to being always easy to remove plugs next time without damaging the helicoil, was to carefully wire brush the threads in the cylinders with a small rotating wire brush in a drill to remove the crud. Doesn't anyone else do this? Reinstall w anti seize of course.

There is no rotating rectifier. All that stuff is on or near the stator. A key is look at the detailed nature of the failure of each alternator. It is not hard to do. I'm surprised it hasn't been flagged earlier - just to say "vibration". Of what? What broke in each case?

I all of my rambling above on torsional vibration assume that all of the failures have been on the alternator rotors. If the failures are on the stator or the rest of the stationary mechanical support system, linear accelerometers would be a valid diagnostic tool. You certainly have thrown...

My guess is there may well be a problem in the torsional vibration control system. Have there been signs of wear on the belt drive (I assume this is that version of O-470)? At least I would be very suspicious of the actual crankshaft damper bushing and drive pins dimensions. I wonder if the...

Dont plan on welding those 2024T3 alum alloy seat rails.