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1/4 scale 1978 Rider Hot Air Engine Kit


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  #11  
Old 02-21-2018, 03:31:56 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: 1/4 scale 1978 Rider Hot Air Engine Kit

That must have been some fall! I didn't realize that that casting was so brittle Andrew dropped my engine and bent the hoop that goes from the cylinder to the flywheel (BOO HISS). Will try and straighten it out. See you at Jacktown??? Mr Smith - the Woodpecker guy built mine. was POed he couldn't get it to run for more than a minute or so, at a time. I hooked the pump up to a water supply, and it ran fine. He was even more POed after that! I got it relatively cheap because for him, it didn't work!

On mine, I took a PEAK camping propane stove burner and modified it so that a hose could be hooked to a propane regulator from a Coleman stove. flame height could be regulated from there. The burner was mounted under the hot section on the engine, inside the fire box. The chimney was made of a copper 3/4" ell and a 1' piece of 3/4" type L copper tubing, painted high heat grill black (semi gloss) If you make your own check balls for the pump, make them out of Teflon or brass. John made mine out of steel, and if I let the engine sit a while, I have to take it apart to free the check balls up! You probably could get them already made from Lee Pederson, if you have the diameter. lee has a selection of checkballs. For a cooling reservoir, I used a brass tank (capacity about 1 Qt, and a home made radiator, made out of 1/4" copper tubing and some copper wire for heat disapation.
Andrew
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  #12  
Old 02-23-2018, 07:40:50 AM
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Firewoodguy Firewoodguy is offline
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Default Re: 1/4 scale 1978 Rider Hot Air Engine Kit

Andrew. yeah, you really wouldn't think that the walking beam casting was that brittle to break. It had to fall on a spot that was 1 in a million. lol. Thanks for the check ball info. Hope you get the hoop fixed on your engine. couple fresh pics. the new beam is done
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Old 02-23-2018, 07:42:48 AM
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Default Re: 1/4 scale 1978 Rider Hot Air Engine Kit

finished shaft for the walking beam. started on the power piston.
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Old 03-09-2018, 08:26:21 AM
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Default Re: 1/4 scale 1978 Rider Hot Air Engine Kit

making of the center power piston
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Old 02-21-2019, 05:04:37 PM
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Default Re: 1/4 scale 1978 Rider Hot Air Engine Kit

displacer piston rod and end.
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