Matronics Email Lists

I would not know about any seals in the lg valve, at least not on a 18 T. The seals are perfectly lapped faces of moving parts , sort of disc valve. So my guess is rust on these faces. You can get dia ...

Hi Michael,
the air pressure numbers look a bit low at below 20 bar, maybe from a Yak 18 two seat. We did fill up a 18 T two years ago, but just cared for stand height, no worry about numbers. You f ...

Hi Michael,
there are two places for pressurizing the lg struts: You checked the bottom filling valve but that is just for extra hard landings when a second piston gets active, which is sitting in th ...

The only centering device I see is on the front strut. But this is only effective at full extension when landing. So when you see a sideways tendency this will have other causes - like a brake draggi ...

Two postings from me ? I said why, because I was unable to contact Richard . So go on with your topic . . . .

Vic

Hi Wendy,
thank you sooo much, your mail landed in my own spam files !! I should check this more often - well, old age I guess. Years ago there was a notice when anything arrived in spam, but no long ...

Hi Richard,
off topic, but I had no luck so far trying to contact you about a set of hoses for a 18 T. Do my emails bounce back to somewhere ? I don´t get error warnings when sending so still head s ...

As glycerine and alcohol can get washed off by water condensation in air I did not see any benefit of using that combo. My approach was clear chain lube , the sticky kind with solvent. Add a decent cu ...

After each periodic pressure tests I spray a lot of motorbike clear chain grease into air tanks and let dry for a few days before refitting in the aircraft. Never had corrosion in between tests. Shoul ...

Did you check the primer jet for a reasonable spray forming, a poor running down of fuel from there is not great for starting ?
As to no suction on carb, my guess the blower drive may be defectiv ...

Starting on mags only or with buzzer coil as is standard ? Check sparks on buzzer coil cable with air closed.

Vic

No matter, how much you mess around with all sorts of torque settings, your real root of the mess is the paper gasket. I bet, nobody with a M 14 has had any troubles there, no gasket , just an o-ring ...

Foreign objects blocking the elevator at the rear of the fuselage after aerobatics. ?? A typical cause for a fatal crash in the 52 .

Vic

We still keep this fiberglass seal, no better idea so far. But when you have to take off the exhaust you need a fresh length of fiber of course because a well used seal ages and disintegrates when und ...

Hmm, still sounds like bad engine rubber mounts or loose engine cowling or cowling seats . . .

Vic

Hi Rico,
how did you check for leaks, with soapy water foam ? Did you check the hose to the pressure indicator plus this instrument itself ? We had same problem on the 18 T but in fact it was the hos ...

These are 18 T floats. Chinese aircraft are extremely rare in Europe.

Vic

That is a typical defect after all these years. The fuel obviously dilutes any additive in the plastic floats so they shrink and no longer float. I copied a few sets in stainless but am not very keen ...

Hi Andrew,
may I suggest to check firmness of engine cowling brackets and cowling cushions ? I don´t know much about your type but with our 18 T we had sudden vibrations for years for unknown reason ...

Well, it is just another ignition coil, so it is mortal - remember coil troubles on M 14s ??

Vic