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Author Topic: Jensen J-42R engine build (finished )  (Read 267 times)

Swift Fox

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Re: Jensen J-42R engine build
« Reply #15 on: July 08, 2019, 04:00:42 am »
Fantastic work Bruce!
Your nose is before your eyes, so trust it first!

IndianaRog

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Re: Jensen J-42R engine build
« Reply #16 on: July 09, 2019, 04:49:17 pm »
Love how it's coming together Bruce and thanks for sharing it step by step.

Rog
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St Paul Steam

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Re: Jensen J-42R engine build
« Reply #17 on: July 20, 2019, 07:31:52 am »
I got a few more things done.

the heat shield is formed ,although I didn't seem to get any photo's of all the finished  holes or paint done



chimney stacks bead blasted & one of the holes taken out




heaters in place



heat shield & wiring finished , quick disconnects used.



now just waiting for the cross-over manifold to come back from the nickel platers.
Bruce
St. Paul Indiana , USA

txlabman

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Re: Jensen J-42R engine build
« Reply #18 on: July 20, 2019, 04:00:25 pm »
Wow! 

You have been busy Bruce.

Thanks for your efforts on this build thread.

This is awesome!


Nick

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Re: Jensen J-42R engine build
« Reply #19 on: July 20, 2019, 11:11:22 pm »
Thanks Bruce, your extra steps like blanking off the hole in the stack support definitely pay off in the end  8)
Nick

St Paul Steam

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Re: Jensen J-42R engine build
« Reply #20 on: July 21, 2019, 07:18:13 am »
I spent several hours on it yesterday, replaced the split axles with a single axle...no improvement on the ease of turning over, I got is down to 3 psi before stall, I will run it in some more today (on compressed air), it seems to improve all the time as the 2 engines break into themselves. I put the cord on & tested both heaters, they work correctly & at about the same temperature on the short test I did. I finished up the plinth with a little wood putty in the voids, careful sanding & a stain of Early American with polyurethane over that once it dried (with the Sunshine we had yesterday...it didn't take long) I'm not happy with the chimney delete on the smoke stack as I can still tell where the hole was, will be re-doing that better today. now I'm just waiting for the cross-over manifold to come back from the Nickel platers (probably still a week away) & with any luck it should be finished.
Bruce
St. Paul Indiana , USA

St Paul Steam

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Re: Jensen J-42R engine build
« Reply #21 on: August 12, 2019, 07:49:50 pm »
I'm still waiting on the Nickel plater to get my parts done, but have been steaming it often the way it sits now & enjoying it immensely.
I performed an endurance run this weekend of my J-42R , I filled both boilers to the very top of the sight glass & ran them for 4 hrs non-stop with "on the fly" oiling every hour, this was on a homemade variac & I had it running at just above stall speed, as the water was being used up I could incrementally turn the variac down. one boiler still showed 1/8" above the bottom sight glass nut ,while the other was right even with the bottom nut, had I pushed it, I feel I could have gotten another 30-45 minutes out of it if I wanted to....but this was plenty. very pleased with this plant.

https://youtu.be/wPeUmW3e8F4
Bruce
St. Paul Indiana , USA

IndianaRog

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Re: Jensen J-42R engine build
« Reply #22 on: August 12, 2019, 07:59:04 pm »
Bruce, 4 hour run has got to be a record for for a standalone Jensen 35, let alone your double boiler version...wow!  It sure runs silky smooth!

Rog
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RedRyder

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Re: Jensen J-42R engine build
« Reply #23 on: August 12, 2019, 08:06:35 pm »
That sure does run great and looks great, too!

txlabman

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Re: Jensen J-42R engine build
« Reply #24 on: August 13, 2019, 05:43:56 am »
Excellent result Bruce.

A wonderful 4 hours of steaming....for sure.

St Paul Steam

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Re: Jensen J-42R engine build
« Reply #25 on: August 19, 2019, 05:56:04 am »
The Jensen J42R is now finished ! all the parts are now in place, & here is a rather long video of the plant, I hope you enjoyed the process & thanks for following along.

https://youtu.be/2muIcQscYwM
Bruce
St. Paul Indiana , USA

 

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