Author Topic: Strictly.... “ Hot Air “  (Read 30672 times)

Offline b.lindsey

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Re: Strictly.... “ Hot Air “
« Reply #375 on: December 01, 2018, 03:42:02 PM »
That worked Jo. Could the displacer be hitting on the bottom of it's stroke?

Bill

Online Jo

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Re: Strictly.... “ Hot Air “
« Reply #376 on: December 01, 2018, 03:57:35 PM »
Thanks. I have tracked down the bonk - the power piston had unwound itself on the mounting and was catching the bottom of the power cylinder  :disappointed: So I need some sort of thread lock to discourage it from doing that again.

No more playing today its getting late.

Jo
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Offline Jasonb

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Re: Strictly.... “ Hot Air “
« Reply #377 on: December 01, 2018, 05:04:14 PM »
Running well Jo, what colour are you going to paint it. Choice of VHT can be a bit limited.

You may have room for a locknut to stop the wrist pin block unscrewing, should go into the passage at the end without having to touch the casting

Offline Admiral_dk

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Re: Strictly.... “ Hot Air “
« Reply #378 on: December 01, 2018, 06:29:49 PM »
That engine is running very well on a candle  :praise2: and this time Jason can't tease you about not finishing it either  :whoohoo:

Offline zeeprogrammer

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Re: Strictly.... “ Hot Air “
« Reply #379 on: December 01, 2018, 06:55:25 PM »
 :ThumbsUp: Congrats!

I've been looking around for an engine that will run off a tea candle. I can't say that's an engine for me but it tells me it can be done.

Given a tea candle, is VHT paint necessary?

Looking forward to seeing what you choose.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
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Online Chipmaster

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Re: Strictly.... “ Hot Air “
« Reply #380 on: December 01, 2018, 07:09:17 PM »
Another Robinson HA is running. LittleAngel:
I added a locknut to the wrist pin block on my engine.

Andy

Offline Alyn Foundry

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Re: Strictly.... “ Hot Air “
« Reply #381 on: December 02, 2018, 01:11:27 PM »
Hello All.

Running so soon on a " tea light " Jo is a serious testament to your engineering skill, very well done.  Months of running are normally needed to " bed in " the different parts.

My own preferred method for the wrist pin block is a dab of Acetate cure Silicon as this serves to seal and lock the item.

Regarding paint, the only component that actually does get very hot is the base. The platform, theoretically shouldn't get hotter than 212/100 degrees because of the water.

Jo, one more video please, after you've had time to both repair and paint the engine.

Cheers Graham.

Online Jo

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Re: Strictly.... “ Hot Air “
« Reply #382 on: December 02, 2018, 04:04:29 PM »
Big R is going back together Graham. I have tried some nut lock on the power piston thread  :noidea: She will have to wait for another day for her next run.


In the mean time I have been having fun  :paranoia: The hot end and displacer on middle R is made up. Of course bending up the outside wrapper using the rollers leaves a flat at the end of the metal  :facepalm: Then you have to shorten it once rolled to get a snug fit. Even then it needed wiring.

And even that did not totally work and first the bottom slipped, then the top, then I melted the corner of the piece of 0.5mm rolled brass and had to add a repair piece. I think this piece would be better if it was spun  ::).

And there is another one of these to solder up and that one cannot be patched  :toilet_claw:

Jo
Usus est optimum magister

Offline Jasonb

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Re: Strictly.... “ Hot Air “
« Reply #383 on: December 02, 2018, 04:29:45 PM »
When you come to do the other one Jo leave the disc oversize and then you just have to file it off flush rather that faff about trying to line it up when its hot

Offline ettingtonliam

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Re: Strictly.... “ Hot Air “
« Reply #384 on: December 02, 2018, 08:48:02 PM »
When I'm rolling up something like that, I try to get the end inch or so to roughly the right radius over a former, then put it through the rollers.

Online Jo

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Re: Strictly.... “ Hot Air “
« Reply #385 on: December 05, 2018, 02:42:48 PM »

:thinking: It still seems to have a bit of a knock but it is better.

Jo
Usus est optimum magister

Offline Jasonb

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Re: Strictly.... “ Hot Air “
« Reply #386 on: December 05, 2018, 02:55:22 PM »
It's running well, did you look to see if those big end links are touching the vertical links, may not show when flywheel is turned as things are being pulled apart but could clash when you move the piston which pushes all the links together.

Painted as well :cartwheel: and the shade of your favorite  :wine1:

Offline b.lindsey

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Re: Strictly.... “ Hot Air “
« Reply #387 on: December 05, 2018, 04:06:43 PM »
Looks great Jo. Love the color too!!

Bill

Offline zeeprogrammer

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Re: Strictly.... “ Hot Air “
« Reply #388 on: December 05, 2018, 04:34:32 PM »
Nice one Jo.  :ThumbsUp:

I'm still amazed it runs on a tea candle.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
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Offline Kim

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Re: Strictly.... “ Hot Air “
« Reply #389 on: December 05, 2018, 04:53:49 PM »
Congratulations, Jo!  That is really nice :)
And running on a tea candle is pretty cool indeed!
Kim