The Bucket Foundry

[WilDun]

........ Yes I did tig weld assist the press fit, both ends just to be safe, Doesn't shake like it did and seems it will rev out more now but still under 4000 rpm it runs like a bag full of arseholes.........
......... I've pissed around with the jetting, timing and power valve settings, seems to make no difference?

I know I shouldn't, (for my own credibility) but .... I will anyway - the balance shaft timing?

[Flettner]

You might not believe it but I put timing marks on the balance shaft drive gears and a key for each bob weight. Because I did assemble the assembly wrong one night, and did it shake. Hence I stupid proofed it
No, I'm sure it's an ignition problem probably haven't stupid proofed that yet. Twisted crank is a consequence not a cause I think.
But yes the press fit was a bit light also.

Ok, more searching, seems the problem is self inflicted, one of the push fit plugs from one of the ignition triggers was only just (or not, depending on how the engine moved) in. Now it's fixed the engine runs much better, still rattles around a bit but not harsh. I need to stupid proof all the electrical plugs. Yay.

[Flettner]

Fly you bastard! And it did.
https://youtu.be/xAAqQukouLk

[Ocean1]

Fly you bastard! And it did.
https://youtu.be/xAAqQukouLk

Was there ever any doubt?

Nice work mate, good to see.

[WilDun]

Fly you bastard! And it did.

Great stuff! - all sounding very crisp - ground speed (when airborne) is quite frightening!
Hope everything is good in the engine now and maybe we'll see some more.
I see you took my advice and had it just clipping the grass!

[Flettner]

I'd love to say it was me flying it but no, my test pilot.
He won't let me fly it yet, airspeed indicator is not working so a new one is on order. Old one was a freebie from a crashed gyro. Thursday might be the day!

[WilDun]

Did he say if the power to weight ratio was a big improvement?

[Flettner]

He loved the power!

[chrisc]

Congrats!

[Frits Overmars]

Fly you bastard! And it did.
https://youtu.be/xAAqQukouLk

[WilDun]

Thats why he wouldn't let Neil fly it any more!

[Flettner]

Ha Ha, small steps.

[ken seeber]

And the lawn looks to be nicely mowed as well.
Good work Fletto..

[Grumph]

Neil, what shrinkage factor do you work to for your general LM25 equivalent patterns ?

I'd better make up patterns for the Lyster calipers while I have some here...

[Flettner]

About 1% / 1.5%
My old alloy shrinkage ruler was about 4mm in 300.
I must say it was a dangerous ruler to have just lying around the workshop.