Bog's Paddleduck Engine

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NickG:
I will just echo what John said, if you've got resistance of any sort it would be crazy to turn it over with a drill. It will just break or bend something and even if not, it won't help at all. I've never used a drill on any engine I've made yet and probably never will.

Try to understand the principle of the valves and the timing they need first, it will be ten times easier to adjust once that becomes apparent.

Nick

kvom:
Since it "did" run for at least a few secs, I think my timing might be OK. However, I have taken it all apart and mostly reassembled, taking some of the advice given in prior posts. A few changes:

1) I followed shred's example and degreased the crankshaft pieces and the crank webs. That should allow the webs to clamp more strongly to the crank.

2) Today I bought a set of T-handle allen wrenches at Sears. The numerous 5-40 SHCS are much easier to tighten with the 3/32" T-handle rather than the simple, shorter 90-degree version I used previously. Same goes for the 6-32 screws.

3) Previously the threaded rod was not fixed in the eccentric fork, so I put a drop of loctite there to keep it from turning. I also found that, while the pistons will move easily no matter how they're turned, the valves are vwery sticky in some orientations. When the loctite sets on the forks, I will try to ensure that the valves are oriented in a postion where they slide freely; I will then adjust the valve tuning by turning the fork rather than the valve stem.

Keeping my fingers crossed. :med:

ozzie46:
kvom

Keep at it. You will prevail. :med:

Know this all you trials are not in vain and will aid others in diagnosing their engine problems. I for one will probably benefit a great deal from your post and I humbly thank you "Shred", "Bogs" and all the other posters for the info posted. :bow: :bow: :bow: :thumbup: :thumbup: :thumbup:

Ron

DeereGuy:
Kvom it sure will be nice to see that running once your all tweaked in.

shred:

--- Quote from: kvom on July 20, 2009, 05:57:32 PM ---Since it "did" run for at least a few secs, I think my timing might be OK. However, I have taken it all apart and mostly reassembled, taking some of the advice given in prior posts. A few changes:

...
3) Previously the threaded rod was not fixed in the eccentric fork, so I put a drop of loctite there to keep it from turning. I also found that, while the pistons will move easily no matter how they're turned, the valves are vwery sticky in some orientations. When the loctite sets on the forks, I will try to ensure that the valves are oriented in a postion where they slide freely; I will then adjust the valve tuning by turning the fork rather than the valve stem.
/quote]
I'd bet while it was running a valve or two rotated just a little into the 'sticky' orientation and stuck there..

--- End quote ---

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