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FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! Babe_b10
FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! Pixel

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FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! Empty

FINALLY!!!!! An Engine Day out in the Shop! Black Lynx Break-In and Pee Wee Backplate Run !!!

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Post  Kim on Mon Jan 20, 2020 7:21 pm

After several false recoveries, it appears that I AM actually doing better...health-wise...so-much-so that I cranked up the heat out in the shop for a break-in of Matt's "Black Lynx" .049 (THANK YOU ALL VERY MUCH AGAIN!!!)), along with my first test run of Bernie's .020 Pee Wee Backplate Assembly.

The Black Lynx was started up on Sig Champion 25% fuel, turning a 5-3 gray.  I ran it for over 1/2 hour nonstop with refuels on the run. leaning it out to peak and back as the time passed.  Toward the last 5 minutes, it was peaking in the mid 17k's, with good needle valve response.

While it may get some photo ops with the 2m B.O.T. before too long, it'll probably end up in my Cox Viper for this year's S.M.A.L.L. Fly-Ins.  Thanks again for this great engine!

FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! 1_87

FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! 2_81

THEN....I assembled an .020 with the new backplate I got from Bernie.  I chose one of my healthier .020's, hoping for as little hassle as possible, and am proud to say it all went well.

The upper mounting holes are REAL snug for my #2 socket head servo screws, and I wanted a washer of some sort to keep them from digging into the plastic.  So, I used a drill motor and Dremel to first, turn down the flange under the socket, and also rounded the flats of a couple #2 machine nuts.  

Drilled out, the machine nuts became thick washers, and fit into the backplate's top two grooves pretty nicely.  I know this all seems like a lot of fuss, and I'm totally prepared for someone to show me an embarrassingly easier way to do this.   The little sucker looks good to me now though!

It started up after little coaxing, fired up and ran steadily...also for a 1/2 hour +. I'd lost my light, and was too lazy to set up an led lamp for the tach, but sounding in it's zone.

FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! 20_19

FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! 22_20

Now, on to assemble another .020 and it's backplate for installation on my slowly moving Carl Goldberg Skylark project.


Last edited by Kim on Mon Jan 20, 2020 8:43 pm; edited 1 time in total
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FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! Empty Re: FINALLY!!!!! An Engine Day out in the Shop! Black Lynx Break-In and Pee Wee Backplate Run !!!

Post  Dave P. on Mon Jan 20, 2020 8:09 pm

I'm really happy to see the Black Lynx running!  It's good to hear that the PeeWee likes the backplate too.  I don't have any advice on the upper washers, what you did looks great.  I'm filing that one away for future use.

It's really good to hear that you're doing better too. That's the best news.

 Thanks for posting!
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Post  Kim on Mon Jan 20, 2020 8:44 pm

Thanks Dave, it was a really good day!
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Post  Jason_WI on Mon Jan 20, 2020 9:52 pm

Good to see another Pee Wee backplate running.

For screws I used some #2 Phillips head wood screws to mount to the backplate in all my testing. I included these same screws with the CEF version backplates. I never used washers. The backplates are printed with 100% infill and are pretty solid. The screws will make a circular depression but hasn’t caused any issues.

Spring starter helps get these guys running. I have used the same intake opening as a helicopter backplate. The heli version .020 always was fitted with a spring starter. The larger intake really opens up these little engine.
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Post  Dave P. on Mon Jan 20, 2020 11:01 pm

Kim wrote:Thanks Dave, it was a really good day!

We take those when we can, don't we?
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Post  Kim on Mon Jan 20, 2020 11:51 pm

Dave P. wrote:
Kim wrote:Thanks Dave, it was a really good day!

We take those when we can, don't we?

Yes Sir....Absolutely !!!!!
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Post  Kim on Mon Jan 20, 2020 11:53 pm

Second .020 Backplate Test:

So, the second .020 adapted to it's backplate nicely, putting in a bunch of time on it's stand. Started easy, and settled into a 1/2 hour run after a little needle work.

Now it's time to turn to the Skylark.

FINALLY!!!!!  An Engine Day out in the Shop!  Black Lynx Break-In and Pee Wee Backplate Run !!! 1_88

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Post  Kim on Mon Jan 20, 2020 11:56 pm

Jason_WI wrote:Good to see another Pee Wee backplate running.

For screws I used some #2 Phillips head wood screws to mount to the backplate in all my testing. I included these same screws with the CEF version backplates. I never used washers. The backplates are printed with 100% infill and are pretty solid. The screws will make a circular depression but hasn’t caused any issues.

Spring starter helps get these guys running. I have used the same intake opening as a helicopter backplate. The heli version .020 always was fitted with a spring starter. The larger intake really opens up these little engine.

Well, it makes sense. I'll probably get some more of these, and use the types you did. Thanks again for your work (mechanical AND mental!!) in getting these figured out. Pee Wee's apparently love them!
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Post  getback on Tue Jan 21, 2020 6:27 am

First off Good to hear ur feeling better than before , good to hear you had a positive experience with the PeeWEEs ! I had been thinking about running something myself as soon as the weather breaks from cold to cool , haven't smelt castor in awhile now need a fix !! lol! Old Bugger
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Post  Kim on Tue Jan 21, 2020 8:10 am

getback wrote:First off Good to hear ur feeling better than before , good to hear you had a positive experience with the PeeWEEs ! I had been thinking about running something myself as soon as the weather breaks from cold to cool , haven't smelt castor in awhile now need a fix !! lol! Old Bugger

Yes you do !!!!!!!!!!!
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