In NZ we test the end play of the crank every 10 -15 hrs on these rotax 2 stroke engines.. Get two spark plugs smashout the ceramics, on one braze in a 3/16 male air fitting fit plastic hose to to it on the other end fit a big medical syringe. On the other spark plug braze or weld a piece of tube the ID diameter of your dial test gauge. Fit to engine suck and push on syringe on one cylinder other has dti which move up and down showing end play of the crank bearing. Swop around measure other cylinder. Known some 582s to go 1000 hrs but they will all fail. Your 503 looks like it was running too lean but that wont have anything to do with crank failure. Should have egt and cylinder temp gauges on 277 447 and 503
Great project, Just a reminder to mount your expansion tank higher than the the cylinder #1 bleeder nipple since it’s a tail dragger and during taxi and run up’s (cylinder 1 ) sits high, so that all the trapped air gets out of the system.
@@FlyboySoCal popped up on Facebook. $1500 with shipping, retracts, spinner, DLE-55RA. Could not say no! In the stash right now but I hope to build it in a year or so
@@FlyboySoCal yes, that makes sense. I'll keep working on my Sabre Trike. Been offered a Rans S-14 but not trained for it and just flying around the Trike it fine but I do like your plane.
Haa. At first I taught for a moment it’s a locomotive engine ?? The way you zoom in. Ha. To find out it’s under 12 inch the whole damn thing. People do have guts to take up that tremor engine ?? 2 cycle hmm. Bzzzzzzzz. Can’t listen that
just like a car engine though you could not hear a knocking connecting rod before it quit? You are lucky. I know those engines have uncaged needle bearings instead of babbit bearing like an auto engine. I am amazed that someone rebuilt the top end and didn't just rebuild the whole engine at the same time.
I'm curious to know if you "parachuted" into the soft dirt. My friend says that's the safest way to land on soft ground. It's done by rounding out, slowing the vehicle down, and essentially stalling it a few feet off the ground. That way, you're forward speed is very low when you touch down. During the three I've had, I've always been able to land on roads, so I just did regular dead-stick landings. Good job being able to walk away from the incident ! That's what's important. My engine-out priorities are as follows: First, keep myself safe. Second, keep my plane safe. If I can achieve those, then I go for my third priority: stay out of the evening news! Stop by the VCUAS in Camarillo if you're ever in the area. -Joe
can you tell me the ID of a 503UL intake manifold if you have one lying around. I don't think my mikuni 34mm carbs like the UL muffler and the load from the prop, might have to get some 36mm carbs
The top of the piston is white, and that was running way too lean, it should be milk chocolate brown to dark chocolate brown, and leaded gasoline in a two-stroke it's only good for producing carbon deposits.
