Author Topic: Lauson LA build  (Read 18330 times)

Offline Craig DeShong

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Re: Lauson LA build
« Reply #180 on: July 29, 2019, 03:00:36 PM »
Thanks for your comments Bill and George.  Thanks also to those silently stopping by to see the progress.

Work has progressed on the kick start mechanism.  As I said up thread, I was very eager to tackle this because itís one of the reasons I chose this engine to model.

In the last post I showed and described cutting the small helical gear.  In this post I tackled the larger helical gear.  This gear has a pitch diameter so large that I doubted if I could use Chuck Fellows handy-dandy helical gear cutter.  This gear is very thin: 3/16th inch and in design I made it a bit thinner than scale.  With the diameter so large and the teeth so narrow I thought I could cut it ďlikeĒ a standard spur gear but with the teeth on a diagonal as shown below.



This turned out to work satisfactorily although, even at this width, the teeth did require a bit of filing to get them to mesh smoothly.  Here I show the finished gear or more accurately, gear arc.



With all the gears behind me I moved on to making the kick start bracket and petal.  The photo below shows the bracket and was a sort-of fun doo-dad to make and got me scratching my head a bit to work out the steps.



The petal was next and though I would have preferred to use aluminum to make the fabrication easier, there is quite a bit of stress and rubbing at the joint between the petal and bracket so I thought steel was a better choice.  Steel sure did make fabrication tougher though.  Below is a photo of the complete assembled mechanism on the engine.



Here is another view:



Finally, I give you a video of the mechanism in action.  Iím really pleased with how smoothly this operates.  At first I was thinking it might be for ďlooksĒ only but Iím thinking it might actually work well enough to be used to start the engine.  Time will tell.
Craig

Offline Ye-Ole Steam Dude

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Re: Lauson LA build
« Reply #181 on: July 29, 2019, 04:25:05 PM »
Hello Craig,

That is super neat and works so smooth :ThumbsUp:

Have a great day,
Thomas

Offline Roger B

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Re: Lauson LA build
« Reply #182 on: July 29, 2019, 08:03:24 PM »
Splendid  :ThumbsUp:  :ThumbsUp: That should be capable of starting the engine  :wine1:
Best regards

Roger

Offline Admiral_dk

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Re: Lauson LA build
« Reply #183 on: July 29, 2019, 08:41:11 PM »
Everything looks amazing so far - one could be forgiven for thinking that first pop is just around the corner  :thinking:    :cheers:     :popcorn:

Offline Craig DeShong

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Re: Lauson LA build
« Reply #184 on: August 28, 2019, 09:59:39 PM »
Thanks for your comments Thomas, Roger, and Admiral.  Thanks for those of you silently stopping by too.

Wow, itís been a month since I posted an update on this project.  Iíve spent some time in the shop this last month, but family vacations and other issues (like replacing all the windows in the oíle homestead) has been occupying the lionís share of my time.

I did get to the Rough and Tumble Engineers Historical Association for their big show this August. I took the Frisco (which refused to show any signs of life at the show  :Mad: though it ran dependably the week before :facepalm:) and my Otto Langen atmospheric IC engine, which ran well all three days I was in attendance :ThumbsUp:.  I also got to spend some time with some of you folks that post here :cheers:.

A main objective while attending the show was to get some pictures, measurements, and information I require for my next project.  Iíll leave that out there as a teaser for now and not inform you of that project yetÖ but will tell you that the design work has already started :whoohoo:.

Well, back to this little LA Lauson.  As you can see, I have the blower housing and fuel tank made and installed, along with a few other odds and ends.  I still need to do a little sheet metal work, plumbing, and more odds and ends before Iíll call it done.  This engine ran before I put it away a year ago and I havenít tried to start it since then. I also want to do a little re-work on the carburetor and then I should be ready to see how well it runs.

A few photos of progress to date:




Craig

Offline gbritnell

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Re: Lauson LA build
« Reply #185 on: August 29, 2019, 12:32:38 AM »
Hi Craig,
The engine looks super and the start gears came out great.
gbritnell
Talent unshared is talent wasted.

Offline Roger B

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Re: Lauson LA build
« Reply #186 on: August 29, 2019, 07:28:26 AM »
Looks good  :praise2:  :praise2: Hope to see a video of the kick start working soon  :)  :wine1:

I know you moved away from the idea of making a magneto but maybe it is possible. How do the dimensions of the Minimag compare to your engine?

http://minimagneto.co.uk/documents/FMK001GA.pdf
Best regards

Roger

Offline Craig DeShong

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Re: Lauson LA build
« Reply #187 on: August 29, 2019, 01:37:29 PM »
Roger

Pretty neat little device.  It wouldn't do in this case since the magneto needs to allow the crankshaft to pass through it and there isn't enough room to fit it under the flywheel and drive it with a gear or belt.

I have a VW Lauson I built several years ago, where I made a "fake" magneto just to house the points.  I was thinking this might be perfect for it but some quick measuring shows it's too big for that application also.

Thanks for passing on this idea though.  Might have a use for it yet in some future project.
Craig