35cc "V" Twin

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Ghosty

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Stof, I have built the 17.5cc single and found these faults with it, The shafts shown it the pics above are hardened shafts that I have used in other engines with no problems, the piston pins have teflon pads on either end, and the prop driver I was looking at using 4 or 6 bolt pattern, and I will machine up a set of locking nuts for the prop.
Cheers
Andrew
 

Ghosty

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Hi All,
Cylinder liners done, just need final honing to size, will machine rings after final sizing, now to clean the lathe up after all the cast iron machining before I continue one with the cylinder cases. I will use the left over stubs to machine the rings.
Cheers
Andrew
 

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Ghosty

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Hi All,
Cylinder cases almost finished, just need to size the square base and drill and tap holes. Turned on expanding reamer that I bought for doing just this process, have used it on several engines.
Cheers
Andrew
 

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Ghosty

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Have not got a lot done, had problems with my hand and arm again., Got the front housing almost finished, need to counter-bore the 8 holes around the shaft ,and countersink the other 2. Used a ball end mill to cut the radius, and will have to finish off the outer dimensions.
A lot of cutting to get rid of the excess material.
Cheers
Andrew
 

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Ghosty

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Hi All,
Did not get anything done on the V Twin today, waiting on material. The 3mm HSS turned up today, had to make a boring bar for it, fount my handle to hold the HSS for grinding.
Have to do a 6mm and 8mm rebate in the crankcase hence the boring bar.
Won't get anything done tomorrow, have to go to daughters and fit security cameras, had some druggies do some damage there last night.
Cheers
Andrew
 

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Ghosty

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Hi All,
For all you watching at home, got the main bore done this morning after spending the day at my daughters. Now the internal boring starts, have to do two steps, some at 6mm larger and one at 8mm larger.
Cheers
Andrew
 

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Ghosty

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Crank shaft bore done, now to do the camshaft bore, assy with dummy shaft to check.
Cheers
Andrew
 

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Ghosty

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Hi All,
For all those watching from home, spent 30mins setting up the crankcase to machine the cam bore only to find out that the chuck jaws hit the bed. So machined out the cylinder holes, will have to split the case and work out how to set up with out damage to the machined surfaces.
Cheers
Andrew
 

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Ghosty

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Hi All,
Got the cam bore and pocket done, drilled and tapped all holes, done the surface finish.
Had to call it a day as my back has been screaming at me for the last hour to stop.
Cheers
Andrew
 

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Ghosty

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Hi All,
For all those watching from home, got some more done today, cam lifter bushes done and installed, did not have any 7mm bar or any thing close, so used some 1/4 hex bar stock, got the cylinder bases done and bolted to the case.
I have had a look and I think I have enough material to be able to cut the cam shaft.
Had some material cut this morning so I can fit the dividing head on the mill so I can cut the cam.
Cheers
Andrew
 

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Ghosty

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Hi All,
Cam blank cut, even a bonus when they line up with the guides, now to triple check the opening and closing angles and duration of each lobe before I start the cutting process.
Cheers
Andrew
 

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Ghosty

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Hi All,
After making up some mounts for the dividing head, I have the cam done, ready for hardening.
Cheers
Andrew
 

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Ghosty

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Hi All,
I'm still going ahead with the engine, still waiting on material to arrive. Had a missed email regarding the material, one size that I ordered is NLA, and after contacting them, they have finished the order with the next size up, more machining now. Now with all the delays the couriers are now delayed as they are overloaded with delivery's. All I can do now is wait.
Cheers
Andrew
 

Ghosty

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Hi All,
I have ordered the material I need for the twin from another supplier, just hope it gets here, first supplier has sent according to them, the tracking number supplier never worked, may never order from them again, never had now problem with them until now.
Other news is another set of plans turned up today, may be a future project, will see if I can use the OHC system on the V twin.
Cheers
Andrew
 

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Ghosty

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Hi All,
Got the shaft material from a different supplier, it arrived yesterday, have had some end of month meetings in the last couple of days, so have been slow, hope to get the crank started today.
Also had a job from a fellow model aircraft flyer, new prop driver, washer and nut for a McCoy 19.
Still got no idea where the order that I put in on the 28th Sept is, and now the supplier is not answering e-mails.
Cheers
Andrew
 

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Ghosty

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Hi All,
For all those watching from home, I got into the crankshaft today. After getting it roughed out, had a problem with my wrist(large bump appeared) and spent a couple of hours at A&E only to be told to see my normal doctor for further evaluation.
Got home had lunch and then got back into it and have most finished, now to clean up before going further.
Cheers
Andrew
 

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Ghosty

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Hi All,
Not a lot today, only parted or the rear crank web, now to decide which way to go with the crank. As I have no tooling to be able to cut a 0.5mm slot in the crank web for clamping the big end pin, I need to look at machining the crank pin directly in the crankshaft, or machine a hole and press the crank pin in. Will need to look at each and see which way to go.
Cheers
Andrew
 

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