1200SportsterRider

Thanks Jim, yes I did, I visited with Frank Noll a while and saw him fly a huge model of a Greek fighter jet, I'm not going back today, the War Birds are beautiful but watching a 150 inch Cub climb nearly out of sight powered by a giant chain saw engine is just interesting to me.


Frank Nolls jet.

Jesse Open

Dave,

How cool is that? Getting to see the event first hand and close to home. Looks like some excellent weather too.

1200SportsterRider

Yes indeed, it was 61 when I left home at 6:55 am and 91 when I left at 2:00 pm. that thing even makes red hot exhaust ring you see on the real thing.

1200SportsterRider

Saito 56 newly rebuilt, the carb needs some TLC, way unpredictable.

Glowgeek

A trashed Saito carb? That would be a first for me.

I had one drive me crazy for a while but eventually fixed it by removing debris that was packed inside of the low speed needle. Don't ask me why having a little debris in there caused running issues but it certainly did. I believe the debris was felt fibers from a cheapo felt filter clunk.

Speaking of felt filter clunks, using one in your tank will elliminate the need for that crap trap at the Cline inlet. It'll catch more crud too. After a season of flying the felt filter clunk can be back washed with DNA without having to remove the tank from the plane. It's not even an inconvience for me, I backwash all my fuel tanks for winter storage anyway.

acdii

Sounds like my Cub with the Saito 100 on it. Takes off in under 10' and climbs vertically like an F15. My club buddies said, Cub's don't fly like that! I did a low pass at a tick above idle, and I hear, Cubs Fly like THAT!

1200SportsterRider

Lonnie, I ordered something to play with while playing with the Cline regulator.

Glowgeek

Sounds like most of my planes. If they need nose weight I'll always opt for a bigger engine over lead. Cubs offer a whole new level of "Cubs don't fly like that!" when you add flaps. Great fun and it really irks the vintage flyers at the field.

1200SportsterRider

I have a couple different check valves to play with and will use the above gauge to experiment.

Jesse Open

https://vignette.wikia.nocookie.net/...20150806001423

1200SportsterRider

Interesting, Thanks

Glowgeek

I built a U-tube manometer, but underestimated the height of the gauge required to measure muffler pressure. Blew the water out of the tube when the engine reached somewhere around 3/4 throttle. Lol

1 psi equals 27.7" water column. To safely measure muffler pressure a U-tube style nanometer would have to be approx 35" tall, using 70" of tubing length.

For measuring higher checked tank pressures a DIY single column vertical manometer is a much better choice imo. The gauge Dave bought is undoubtedly not as accurate as a properly calibrated manometer but still a good choice.

1200SportsterRider

That gauge was 13 bucks, it's quite easy to pressurize a Roto Flow tank to 20 psi with a single squeeze of a Sullivan fuel bulb. I tapped threads into the inlet for a Saito vent.

Jesse Open

Agree, yes the gauge is quite handy, good move too Dave using the Saito fitting.

the Wasp

My Feedback: (1)

LOL I have seen the YS 80 and 91 engine Heli guys release the pressure from their tanks. Psssssssssssssssssssssssssssssssssssssssssssssssss . a bit more pressure than they would ever need. but those engines also have regulators. I always wondered how much pressure they had in those tanks

Jim

acdii

I watched the one I was using balloon up pretty good when I bench ran the YS 61 I put in the Liberty Sport. Need a good strong tank for a YS.

modeltronics

My Feedback: (27)

Dave,
How would you like some electronic pressure sensors?

the Wasp

My Feedback: (1)

only if it will tell me how much air is traveling thew the fins on my engine's head LOL

Jim

modeltronics

My Feedback: (27)

JIm,
No kidding....I may have some electronic airflow sensors left over from my working days.

the Wasp

My Feedback: (1)

LOL how much they weigh LOL

EDITED really thO, that would be a cool thing to test on a plane set up for that.

Jim

modeltronics

My Feedback: (27)

The larger one is an airflow sensor. A version of this is used in a CPAP to detect air flow. It is a true mass airflow sensor. The smaller one is a pressure sensor. I have a variety of pressure sensors around. These are just the unamplified sensors and they require external electroniscs such as an instumentation amp. I also have a bunch of linear hall sensors around. I wish I had collected a few digital hall sensors like used in a CDI system. Years ago if you drove an American, German or Japaneese car I had my fingers on some of the sensors in it.. I have the patent on a sensor that can smell gas fumes by looking at the thermal conductivity of the air. Funny thing that now that I am retired I have only a small interest in electronics and I want to learn all I can about machining.

Glowgeek

A patented engineer are ya, Pedro? Congrats on that, good sir!

"You are inwentor!"
-Chekov-

the Wasp

My Feedback: (1)

you can buy Diode sensors cheap that we used on model Heli governors. they work well. I used them.

Jim

1200SportsterRider

Lonnie, on the Cline I kept the diaphragm is stiff, it leaks fuel when the tank is pressurized. If you take it apart and push the diaphragm back, it will work one time to pressurize the tank. Then when you draw fuel through it, it leaks again. I have this D-10 WAT kit coming to fix it..

Glowgeek

If all you need is the gasket and diaphragm the D-10 will work. IIRC, the K-10 WAT has the Inlet needle and lever parts included as well.