Upshur Twin

[cobra428]

Crankshafter,
Very very nice! I bought the plans for that eng about 2 months ago. I'm getting a good build lesson
Thanks
Tony

 

[crankshafter]

Hi guys.
The Upshure Twin- project was set to hold last winter. It was so damn cold in the shop( I was almost freezing my ba..s of.) 12-14 hours day at job, oh my....
Finally spring comes and I was hooked on the pretty build of the Hoglet Twin( this month winner), ordered the plans and started on my own Hoglet-project ;D.
The Upshure Twin will be taken care of some time during fall, hopefully ;D.
but tomorrow I will have my suitcase filled up and take the topside taxi over the pond and see family in the US.
Regards CS

 

[zeeprogrammer]

This was the first time I saw this thread.
Watched the video of the Twin being driven by the lathe.

Wonderful stuff. That was great.

Enjoy your trip.
Whereabouts in the US?

 

[crankshafter]

Carl.
I'll will be in the burning heat of Texas for the next two weeks.
CS

 

[vlmarshall]

From freezing cold to burning hot...sounds miserable. Try not to develop any stress cracks. ;D

 

[raym 11]

I built a upshure twin from MEB plans a while back. I cant seem to make it run more than one speed (~ 1500 RPM) no matter the throttle/fuel needle adjustment. I ran it on a Ridders vapor carburetor with the same results although lower RPM. I am going to convert to CDI ignition (maybe hall sensor).

The problem is probably carburetion? Be interesting to hear of your running.

Any suggestions are appreciated.

p.s.s. the very similar carburetor on my Upshur 't-head' marine engine runs nicely.

Ray M

 

[raym 11]

I converted the ignition system to Roy Sholls' CDI and all my problems went away. Looks like my 6vbattery with 12 volt coil couldn fire fast enough to feed the twin ignition.
Hope this helps someone to not spend lots of time trouble shooting on startup
Ray M

 

[rklopp]

I converted the ignition system to Roy Sholls' CDI and all my problems went away.
Ray M

Ray, are you running with Hamilton's original single carburetor design, or two carburetors? If your carburetors are different from the design, what kind are they? I finished the "B" sides of 20 connecting rods over the weekend. These are for a set of six Upshur Twins I am making. I must be nuts.

 

[raym 11]

my carb is now back to original design.
Ray