Bengs ‘Karl’ Hit & Miss engine.

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Bengs ‘Karl’ Hit & Miss engine.

This topic has 13 replies, 9 voices, and was last updated 22 April 2019 at 19:58 by Ian Skeldon 2.

Viewing 14 posts - 1 through 14 (of 14 total)

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26 April 2016 at 16:33 #2453
Andy Holdaway
Participant
@andyholdaway
My first engine build.
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26 April 2016 at 16:33 #236311
Andy Holdaway
Participant
@andyholdaway
After having no joy with the Bengs Stirling 'Laura', I decided to have a go at their Hit & Miss engine, Karl.

It's taken 4 months, and has been a steep learning curve but I finally got there!

Just need to take it all apart now and repaint it using fuel proof paint – Duh!!

Andy
26 April 2016 at 16:47 #236312
JasonB
Moderator
@jasonb
Runs well Andrew, I like the lever to bring the hit & Miss governor into action, not seen that on a model before.
26 April 2016 at 17:14 #236315
pgk pgk
Participant
@pgkpgk17461
Looks good!
26 April 2016 at 17:19 #236316
Andy Holdaway
Participant
@andyholdaway
Thanks Jason and pgk, the lever just turns a cam that holds off the governor. I will be replacing the coil with a CDI unit when I strip it down, the ignition's a bit optional as the plug sits quite deep in the head and the spark isn't particularly strong.

Apologies for the poor quality video, it's the first time I've used the camera for about two years and I probably should have cleaned the lens first.

So the question is, what next? I don't have a milling machine (yet) so I'm a little restricted on what I attempt. I suppose I should revisit my failed Laura stirling engine before starting anything else.

Andy

Edited By Andrew Holdaway on 26/04/2016 17:37:04
26 April 2016 at 18:06 #236327
nigel jones 5
Participant
@nigeljones5
I do like that!
26 April 2016 at 18:51 #236329
MichaelR
Participant
@michaelr
I like that engine which prompted me to have a search and found this. Here Mike.

Edited By MichaelR on 26/04/2016 18:52:58
10 February 2019 at 21:23 #395689
Robert Askew
Participant
@robertaskew15193
just got my kit

and I must say the drawings and info supplied leave a bit to be desired
11 February 2019 at 05:15 #395738
John Olsen
Participant
@johnolsen79199
What sort of problem are you having with the Stirling engine? They tend to need accurate work, eg pistons a good fit without being too tight, any sliding seals do not need too much friction, and so on. Any sort of air leak is bad. There are people around here, like Ian SC, who have made a lot of hot air engines and might be able to advise. I've only made one, the Rider Ericsson one. It goes well, but even just a little over tightening of the gland on the little water pump is enough to stop it.

John
11 February 2019 at 10:39 #395770
Ian S C
Participant
@iansc
John's pretty well covered the Stirling engine. I'v been looking at your build thread from 2 or 3 years ago, you were going well right up to the end, then you pulled it apart to clean things up, then you had alignment problems, I think if you fix that you should be OK. One thing that I like is the displacer rod guide, but it could be trouble if not dead on lined up.
Ian S C
11 February 2019 at 11:59 #395781
Robert Askew
Participant
@robertaskew15193
i am not making a sterling engine,I am making a Bengs hit and miss open crank 4 stroke engine,the problem is some the drawings are missing dimensions, I have to keep e maling bengs to get the sizes,and they don’t seem concerned that they are missing
12 February 2019 at 13:04 #395940
Ian S C
Participant
@iansc
Sorry Andy, got a bit mixed up with another Laura. It might be worth having another bit of a go at yours sometime in the future, it's good to get it up and running.

Ian S C
22 April 2019 at 17:45 #406052
Robert Askew
Participant
@robertaskew15193
Just finished my bengs hit and miss Karl

cant get it to run

checked timing got spark and loads of compression so much I can hardly spin it past tdc

any suggestions
22 April 2019 at 19:58 #406071
Ian Skeldon 2
Participant
@ianskeldon2
Nice engine Andy.
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