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Cox Engine of The Month
November-2019
jmcalata's

"Pee Wee .020 throttled combinated"



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Post  batjac on Fri Aug 02, 2019 11:49 pm

While I was at the Northwest Regionals a couple of months ago, I was talking to Paul Gibeault about engines.  He let me look in his little Box O' Magic and see how he documents his engines.  I asked if I could take a picture and post it on the forum.  Behold, what true dedication means:

What it takes to be a champion 20190526-104024

The man is a true Master of Mouse Magic.

The Not Worthy Mark
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Post  Marleysky on Sat Aug 03, 2019 12:16 pm

I think what you ment to type was, “The Note Worthy Mark “.
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Post  rsv1cox on Sat Aug 03, 2019 6:56 pm

Marleysky wrote:I think what you ment to type was, “The Note Worthy Mark “.  

Smile Smile
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Post  ticomareado on Sat Aug 03, 2019 8:17 pm

I see that top L/H engine has a plastic back plate on it. As I recall, there was some previous thread that didn't speak too highly of plastic back plates. I wonder if anything special has been done regarding this example.
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Post  NEW222 on Mon Aug 05, 2019 3:50 pm

With any luck, Paul may log in here and see this and answer the question regarding the plastic backplate. But from what I can see is that there is a different needle valve assembly in the backplate. Is it possible that it is easier to remove and replace the needle assembly in a plastic backplate is easier than that of an original cast one?
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Post  aspeed on Mon Aug 05, 2019 4:43 pm

I wonder what he means with the .080" tank - backplate? Looks like maybe he took .020" off the case, or maybe that is what he wanted for headspace when he says deck .020". He seems to like nitro anyway. 65%.
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Post  batjac on Mon Aug 05, 2019 5:18 pm

Not sure about the plastic backplate. I didn't ask too many questions of Paul, as I didn't want to take up too much of his time. There was racing going' on, ya know.

The .080, .081, or .089(???) I just naturally assumed was the venturi tube inner diameter, as the generally accepted optimum diameter for the venturi in a reedie is .082".

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Post  aspeed on Mon Aug 05, 2019 6:31 pm

That sounds logical/obvious thanks. Now the .020?
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Post  rex f. on Tue Aug 06, 2019 6:26 am

The optimum orifice size on a reedie is
Venturi.092
Backplate  .085
No idea what  is meant by deck ..020
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Post  gkamysz on Tue Aug 06, 2019 9:21 am

Paul explains in his articles, deck height is what is more commonly called squish clearance.
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Post  aspeed on Tue Aug 06, 2019 9:43 am

OK, seems much higher than I would go, but I suppose I don't use 65% nitro any more.
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