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PAW 29 JUST GOT nib - 10/3/2012 6:52 PM   
AMB


 

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From: winter park, FL, USA
Status: offline 		OK Group thanks to Dennis just got this NIB PAW 29 with silencer and C/L/ carb, have an RC ASP carb coming from Hobby King
there no markings anywhere on the crankcase?? strange never saw this one before martin

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RE: PAW 29 JUST GOT nib - 10/3/2012 7:37 PM   
ffkiwi


 

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Status: offline 		None of the PAWs have any markings on the crankcase Martin, but the capacity is usually stamped (in very very small numbers< 1/16" high) in the backplate well. Depending on orientation these numbers may be at the top, side or bottom when you look at the engine. Works tuned engines normally have the letter 'T' stamped on the top side of the mounting lug.

ChrisM
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RE: PAW 29 JUST GOT nib - 10/3/2012 7:58 PM   
AMB


 

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Status: offline 		Chris Right you are very small number "29" stamped on backplate martin

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RE: PAW 29 JUST GOT nib - 10/3/2012 8:09 PM   
earlwb


 

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Status: online 		I don't remember seeing any markings on my PAW .29 example. Here are some  pics of my example of a PAW .29.  I bought mine one day in the past from the local hobby shop where I found it in the items on consignment display case. There is a stamping on the left mounting lug, but I forget what it had stamped on it now.

I had a vague memory of PAW stamping on the mounting lug of the engine whether it was a plain bearing, single ball bearing or maybe a dual ball bearing version. So that might be what the two letters stamped on mine were for.













< Message edited by earlwb -- 10/3/2012 9:30 PM >

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RE: PAW 29 JUST GOT nib - 10/3/2012 9:33 PM   
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Status: offline 		Omitted from my earlier comment-usually ballraced engines will have 'BR' or 'TBR' stamped on the top of the lug (usually the left lug) again in small letters about 1/16" high. If I can get the 'super macro' function on the Fuji Finepix to hold focus I'll post some pics shortly.........

ChrisM
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RE: PAW 29 JUST GOT nib - 10/4/2012 12:39 AM   
Recycled Flyer


 

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Status: offline 		PAW 29, first of the 4 head bolt engines that broke the mold away from the ubiquitious 15/19 series.

Nice thick contra piston on these for stable running but the penalty is that is a tad heavy for its capacity compared to the rest of the range.


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RE: PAW 29 JUST GOT nib - 10/4/2012 1:06 AM   
fiery


 

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Status: offline 		I am looking forward to your running report of the .29 Martin.

No need to wait for the R/C carb to arrive. Just run it in with the standard venturi. Set the needle nice and rich, plenty of short runs with complete cool down in between. Then, when the carb arrives, you are ready.

Recycled, when was the .29 introduced? I bought my PAW .35 while living in the UK in 1988, so it must have been some time ago. Is the .35 is a "bored out" .29, i.e shares the same crankcase?

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RE: PAW 29 JUST GOT nib - 10/4/2012 1:39 AM   
ffkiwi


 

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Status: offline 		Fiery-in a word-yes! IIRC both are quite a bit under their nominal stated capacity as well. I'm not sure (not having one) whether the 40 shared the same sized crankcase. I imagine the 49 and 60 share a common case.

ChrisM
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RE: PAW 29 JUST GOT nib - 10/4/2012 2:07 AM   
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Status: offline 		Quite right, Chris, the 49 and 60 share a common case (the 40's isn't shared with anything else). I think you're also right about the capacities - I don't have any figures, but from memory my 35 is actually more like a 34. Although the 35 is lighter than the 29, a friend (who should know) reckons the 29 is sweeter-running.

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RE: PAW 29 JUST GOT nib - 10/4/2012 2:08 AM   
ffkiwi


 

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Status: offline 		OK guys, after checking about 15 PAW examples in a variety of sizes I offer the following observations.

(1) Size marking is not universal across the range, it only occurs where the same physical size may have two capacities-ie the 80/100, the 249/19 and the 29/35 pairings.
(2) None of my 55s or 149/09s have any size marking stamped on the backplate
(3) size marking only seems to have been introduced in the mid 80s, with the advent of the 80 and 100, and it is limited to the 'new' crankcase style-none of the vertical intake models I have show any size marking-and this includes 249 and 19 sizes where you might expect it
(4) The coloured 049 and 06 (mauve and green respectively) do not have it-I cannot comment whether the more recent plain headed ones do [my guess would be: YES]
(5) The use of 'T' to designate a works tuned model goes back to the early upright intake models
(6) More recently, the use of 'BR' and 'TBR' on the left lug to designate ball raced models

I do not have any of the Goodyear, CT, VTR etc high performance 249 and 19 models to confirm what, if any markings they bear.

Examples of the above markings below:

ChrisM
'ffkiwi'

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< Message edited by ffkiwi -- 10/4/2012 2:53 AM >

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RE: PAW 29 JUST GOT nib - 10/4/2012 2:32 AM   
Recycled Flyer


 

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quote:

ORIGINAL: fiery
Recycled, when was the .29 introduced? I bought my PAW .35 while living in the UK in 1988, so it must have been some time ago. Is the .35 is a "bored out" .29, i.e shares the same crankcase?


Hi Derek,
 I am not exactly sure as to when the 29 hit the scene but -
http://www.rcuniverse.com/forum/m_10831936/anchors_10845502/mpage_2/key_/anchor/tm.htm#10845502
gives in part "The PAW 29 (preceding the 35) had been developed when stunt models were getting larger and the excellent PAW 19TBRs were not quite enough to carry one of "preferred" size."

And given that the 29 and 35 engines are the same price, exactly the same external dimensions, are lumped togther in the spares listing and following the convention shown between the 15 and 19's its a fair chance that the 35 is simply a bored and stroked version of the 29. But note that in every case the 29 is heavier than a comparable 29, and I and reliably told that the contra is quite thick - hence me going with a longer stroke here.

The only bore and stroke figures that I know of are here and they are very incomplete -
http://modelenginenews.org/engrev/index.html

Cheers.



< Message edited by Recycled Flyer -- 10/4/2012 3:00 AM >

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RE: PAW 29 JUST GOT nib - 10/4/2012 2:43 AM   
ffkiwi


 

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quote:

ORIGINAL: steve111

Quite right, Chris, the 49 and 60 share a common case (the 40's isn't shared with anything else). I think you're also right about the capacities - I don't have any figures, but from memory my 35 is actually more like a 34. Although the 35 is lighter than the 29, a friend (who should know) reckons the 29 is sweeter-running.



Steve I'd have to go digging through my AM collection to drag out the respective engine tests (mid 80's or early 90's) but I vaguely recall the 29 being about ............found it-July 85 AM, Mike Billington test report...0.2786 cu in or 4.566cc-so well undersize for a 29. Only made 0.4BHP at 11,220...but it was the RC carb equipped version. The report gives a bore of 0.739" and a stroke of 0.651"

[I keep having to add edits.........]

"...this largest but one of the PAW range appeared two years ago, with the overbored 0.35 cu in (5.7cc) engine following a year later" this is from the July 85 AM engine test, so that puts the advent of the 29 sometime in 1983, and the 35 in 1984. Given there could be a lead time from test to publication in AM of several months that would argue for early in '83..........
ChrisM
'ffkiwi'

PS Whilst scanning through test summaries I also note there was a PAW 51.........also presumably in the 49/60 case.

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RE: PAW 29 JUST GOT nib - 10/4/2012 3:41 AM   
Recycled Flyer


 

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quote:

ORIGINAL: ffkiwi
PS Whilst scanning through test summaries I also note there was a PAW 51.........also presumably in the 49/60 case.


Yeah, the only info on the 51 that I have ever seen ranges from non existant to mythical and the only mention is from Derek Pickard.

Anyone got the goods on this one?



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RE: PAW 29 JUST GOT nib - 10/4/2012 4:07 AM   
ffkiwi


 

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ORIGINAL: Recycled Flyer

Yeah, the only info on the 51 that I have ever seen ranges from non existant to mythical and the only mention is from Derek Pickard.

Anyone got the goods on this one?




Only the Derek Pickard article in AM issue #738-maybe it was a prototype he had and it turned out to be a dog? PAW might have decided prospective sales weren't going to be great, too much development still required, not worth putting into production? There has to be a reason why something would disappear without trace......

ChrisM
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RE: PAW 29 JUST GOT nib - 10/4/2012 5:35 AM   
Recycled Flyer


 

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Status: offline 		I have a photostats showing an enlarged Freebird powered by the mystical PAW 51by Mr Pickard.

In that he says its a fine engine, a real 'British Bulldog.'


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RE: PAW 29 JUST GOT nib - 10/4/2012 5:03 PM   
earlwb


 

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Status: online 		I wonder if the .51 evolved into the .60 that PAW still sells today.
That is maybe a .01 inch overbore or maybe a little longer stroke too.


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RE: PAW 29 JUST GOT nib - 10/4/2012 6:25 PM   
AMB


 

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Status: offline 		Ok group Hot as He** out there today 90s but I had a few minutes to bench the 29 only ran about 6 minutes 12x5 wood zinger all we got was 7200 so far
started at about 6400 compression varied plus or minus from factory set less than 1/2 turn hums nice about 1 1/4 open on needle. It has fore and aft play between propdriver
and crankcase about 1 mm think I will get a washer between them maybe thinned to 1/2mm
Flipped and flip sputters decided to put the starter to it, but decided a few more hand flips off it went, stopped at one minute let cool, 3 or 4 finger flicks on off was repeatable. It sounded a little "hard" but backed off compression 1/3 turn and fine, oil ( brown) out exhau,st very little smoke

Ether may have been low it was the last oz in a 1 qt can Davis 1/2A mix

Just re-ran fresh fuel wood zinger 11x6 8200 5-6 finger flips nice manners no kickbacks, vibration nil

< Message edited by AMB -- 10/4/2012 11:53 PM >

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