Straight Talk on the PAW .60 TBR R/C Diesel
#51
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Hi
I wonder if your engine is fully broken in.
My PAW 49 needed a lot to fully break in.
It sounds like your engine might need more compression along with the proper needle adjustment..
I wonder if your engine is fully broken in.
My PAW 49 needed a lot to fully break in.
It sounds like your engine might need more compression along with the proper needle adjustment..
#52
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Wonderful thread. Got interested in PAW . 60, diesel, even with no experience with diesels - never even seen one run in person. Glow fuel difficult to impossible to obtain where I live, but diesel fuel components available. Lower sound level appealing, electric having no appeal. Contemplating using .60 PAW diesel in a half or third scale version of Basic Ultralight Glider, powered biplane version. Have to drag out some NIB 1.5 diesels I have laying around, in addition to small glow engines - cox - that I'm thinking of perhaps using as diesels, and fire them up.
#53
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OS LA .65 Bolly 13.5x8 DDD Plane Fuel===9,300
PAW .60 same Bolly 13.5x8 DDD Plane fuel===7,300
Here is the difference between an LA .65 conversion and a PAW .60 which Fiery now owns.
PAW .60 same Bolly 13.5x8 DDD Plane fuel===7,300
Here is the difference between an LA .65 conversion and a PAW .60 which Fiery now owns.
Last edited by Hobbsy; 10-25-2017 at 04:32 AM.
#55
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Whew! talk about resurrecting an old thread!
Hi guys, I think the tiny throttle bore on the Paw is a huge handicap. My next step was to fit a larger carb to but I have not gotten around to it in all these years. I still have the plane and engine an I recently decided to start flying my bigger planes again / go back to the club who knows? I might get inspired to try again.
Anyways: The carburetor's throttle bore is 5 mm which precisely matches the throttle bore on my Enya SS30BB.. It would seem there's a lot of room for improvement. Again, Paw has set it up for tremendous fuel economy and strong suction to alleviate the need for muffler pressure. They succeeded on the fuel economy front but not really on suction. It was a 10 minute deal to add a muffler pressure nipple and that significantly improved both throttle response and run consistency.
Mecoa (Model Engine Company Of America - MECOA HP RJL model airplane engine, engines for airplanes boats and cars) has a large selection of carbs at reasonable prices. That's where I would go to get a couple and try..
That's my 2 cents.
Hi guys, I think the tiny throttle bore on the Paw is a huge handicap. My next step was to fit a larger carb to but I have not gotten around to it in all these years. I still have the plane and engine an I recently decided to start flying my bigger planes again / go back to the club who knows? I might get inspired to try again.
Anyways: The carburetor's throttle bore is 5 mm which precisely matches the throttle bore on my Enya SS30BB.. It would seem there's a lot of room for improvement. Again, Paw has set it up for tremendous fuel economy and strong suction to alleviate the need for muffler pressure. They succeeded on the fuel economy front but not really on suction. It was a 10 minute deal to add a muffler pressure nipple and that significantly improved both throttle response and run consistency.
Mecoa (Model Engine Company Of America - MECOA HP RJL model airplane engine, engines for airplanes boats and cars) has a large selection of carbs at reasonable prices. That's where I would go to get a couple and try..
That's my 2 cents.
#56
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If you can find an Irvine .40 "Jetstream" carb, it works perfectly.
I put one for the Irvine .25 on my PAW .40 and was delighted.
I put one for the Irvine .25 on my PAW .40 and was delighted.
Last edited by fiery; 10-25-2017 at 09:21 PM.
#57
Question
Hobbsy, did you modify the head on the Saito 80? I got my OS 56 FA running on home brew mix and I used the glow plug to start. It is finicky on the carb settings though.
#58
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No sir, it has a 15.5 to 1 compression ratio stock, it fires right up with no coil in the plug.
http://sceptreflight.com/Model%20Eng...o%20FA-80.html Clarence Lee's test of the early Saito .80.
http://sceptreflight.com/Model%20Eng...o%20FA-80.html Clarence Lee's test of the early Saito .80.
Last edited by Hobbsy; 11-29-2017 at 06:31 AM. Reason: Add link
#62
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Yep, a lot of people think about that backwards, they think a larger prop should require higher compression when the exact opposite is true. A larger prop equals slower, smoother idle too.
#64
#65
For me the big disappointment with PAW diesels is they are so long from back to thrust plate that they are hard to fit into the old rotary engine cowlings of WWI types, which is how I wanted to use them. Also I never quite got used to the smell and mess of my .40. They do sound wonderful, and I really miss that part. I still like smaller diesels.
Jim
Jim