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Brian does Ridders flame eater

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  • Lew Hartswick
    replied
    Originally posted by brian Rupnow View Post
    I spent the lions share of today making a crankshaft, a crank throw and con-rod big end pin. I called about my bearings but they won't be in until tomorrow. I also drilled the 1/8" hole for the valve rod full length of the cylinder---You can see a 1/8" piece of cold rolled setting in the hole.
    With the "low power" available from these engines, doesn't running that rod through a hole cause some additional frictional losses?? It's bound to rub a bit isn't it?
    ...lew...

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  • brian Rupnow
    replied
    No--Silver solder
    Last edited by brian Rupnow; 02-20-2018, 07:25 PM.

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  • sid pileski
    replied
    Did you braze the crank disk to the shaft?

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  • brian Rupnow
    replied
    I spent the lions share of today making a crankshaft, a crank throw and con-rod big end pin. I called about my bearings but they won't be in until tomorrow. I also drilled the 1/8" hole for the valve rod full length of the cylinder---You can see a 1/8" piece of cold rolled setting in the hole.

    Leave a comment:


  • BobinOK
    replied
    Leave them alone, look pretty and will add to the surface area for heat transfer.

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  • Willy
    replied
    Originally posted by brian Rupnow View Post
    In the above picture you can see the chatter marks made by my parting off tool when cutting the fins. Other than a narrow file, does anybody have a better way to get rid of these chatter marks?
    Originally posted by sid pileski View Post
    I use a 1.0 strip of emery folded in a "U"..
    If needed, fold it over a backer, like a paint stick for instance.

    Sid

    This will work, a popsicle stick comes to mind. A small file as you mentioned would also serve well.
    I would be inclined to use a very narrow HSS tool bit ground to simulate a parting tool. I have several like this ground from either a 3/8" or 1/2" blank ground down to about a .030" width that I use for O-ring grooves or fine detail work much like what you are doing.

    My only concern is that being 316ss it may now be work hardened.

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  • sid pileski
    replied
    Originally posted by brian Rupnow View Post
    In the above picture you can see the chatter marks made by my parting off tool when cutting the fins. Other than a narrow file, does anybody have a better way to get rid of these chatter marks?
    I use a 1.0 strip of emery folded in a "U"..
    If needed, fold it over a backer, like a paint stick for instance.

    Sid

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  • brian Rupnow
    replied
    In the above picture you can see the chatter marks made by my parting off tool when cutting the fins. Other than a narrow file, does anybody have a better way to get rid of these chatter marks?

    Leave a comment:


  • brian Rupnow
    replied
    Originally posted by vpt View Post
    Guess I should pay more attention, its been on every rendering and blueprint posted.

    Besides following the plans is there a reason not to just make the flywheel and shaft out of just a single piece of material?
    Brass is heavy, and very pretty, but you really don't want it for a shaft. It doesn't stand up to that type of use particularly well. Also, brass costs a fortune, and you don't want to be buying a great big lump of it to turn into chips to incorporate the shaft into the flywheel.

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  • brian Rupnow
    replied
    VOILA!!! We have a base for our flame eater engine. I was supposed to go across town today to my "real job" but got a last minute reprieve by email. I hope my bearings come in today.

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  • vpt
    replied
    Guess I should pay more attention, its been on every rendering and blueprint posted.

    Besides following the plans is there a reason not to just make the flywheel and shaft out of just a single piece of material?

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  • dalee100
    replied
    Hi,

    Ridder's plans call for drilling that setscrew hole at a 45deg angle in the hub. I didn't see doing that either and did the same as you, and drilled straight through the flywheel. It kind of detracts from the look of the rim a bit, but it's much easier to do. I think maybe I should make a plug to fill the hole.

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  • brian Rupnow
    replied
    Originally posted by vpt View Post
    Is that divot in the flywheel for balancing?

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  • vpt
    replied
    Is that divot in the flywheel for balancing?

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  • brian Rupnow
    replied
    This morning I whittled out a pair of crankshaft bearing stands. Nothing too exotic, but it'll do. I don't have the bearings yet that fit into the stands. I don't know if I have material for the baseplate or not---Will have to search my odds and sods basket to see.

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