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General control line discussion => Open Forum => Topic started by: Claudio Chacon on May 13, 2022, 09:26:37 AM
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Hello guys!
Anyone knows what 3 blade prop Mr. Paul Walker used in his Nat's winning Miss America?
Also, as I recall, it had a Saito 4 stroke on the nose: was it a .56 or .72?
Thanks!
Later,
Claudio.
PLEASE NOTE: I POSTED WRONGLY THIS SAME TOPIC IN THE "BUILDING TECHNIQUES" SECTION. PLEASE DELETE IF NECESARY AND KEEP THIS ONE ALIVE.
THANK YOU!
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Why not send PW a personal message?
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Why not send PW a personal message?
Message sent.
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I had tried many a prop on those 3 Mustangs.
The first 2 were take apart, and every part was interchangeable. The first used Saito 56. The second a Saito 72. The third was a one piece configuration to see how light it could be made. It was 62 ounces, and with a 72 was a very good flier. It also sported a Saito 82. That motor was a monster, but had more vibration issues than the 72. Likely why they never went into full production.
The props tried were as follows. The first was a Yatchenko 13*5 wood prop. I liked it well enough to have Brian Eather make carbon versions of it. They worked well, but the mass of that club was a bit much. I then tried various diameters of the Bolly 3 blade series. 13.5 diameter down to 12.0 diameter. Pitch ranged from 4 to 6. I settled on the 13.0 diameter with 5 inch pitch..
The plane flew better with pitch lower than 5, but the motors did not like to Rev that high. Fuel was YS 20-20. By far, that was the best fuel for those motors.
One thing to be aware if is the variability of the Saito motor builds. I had one that was clearly better, so I set out to find out why. It seems that every one was slightly different. The cam lobe shape was not consistent nor was the assembly. Some were off a tooth on the cam timing as well.
Have fun playing with these.
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I had tried many a prop on those 3 Mustangs.
The first 2 were take apart, and every part was interchangeable. The first used Saito 56. The second a Saito 72. The third was a one piece configuration to see how light it could be made. It was 62 ounces, and with a 72 was a very good flier. It also sported a Saito 82. That motor was a monster, but had more vibration issues than the 72. Likely why they never went into full production.
The props tried were as follows. The first was a Yatchenko 13*5 wood prop. I liked it well enough to have Brian Eather make carbon versions of it. They worked well, but the mass of that club was a bit much. I then tried various diameters of the Bolly 3 blade series. 13.5 diameter down to 12.0 diameter. Pitch ranged from 4 to 6. I settled on the 13.0 diameter with 5 inch pitch..
The plane flew better with pitch lower than 5, but the motors did not like to Rev that high. Fuel was YS 20-20. By far, that was the best fuel for those motors.
One thing to be aware if is the variability of the Saito motor builds. I had one that was clearly better, so I set out to find out why. It seems that every one was slightly different. The cam lobe shape was not consistent nor was the assembly. Some were off a tooth on the cam timing as well.
Have fun playing with these.
Thank's Paul!
Very enlightening info...
Kind regards,
Claudio.
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Are there any plans available for the P51?
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I had tried many a prop on those 3 Mustangs.
The first 2 were take apart, and every part was interchangeable. The first used Saito 56. The second a Saito 72. The third was a one piece configuration to see how light it could be made. It was 62 ounces, and with a 72 was a very good flier. It also sported a Saito 82. That motor was a monster, but had more vibration issues than the 72. Likely why they never went into full production.
The props tried were as follows. The first was a Yatchenko 13*5 wood prop. I liked it well enough to have Brian Eather make carbon versions of it. They worked well, but the mass of that club was a bit much. I then tried various diameters of the Bolly 3 blade series. 13.5 diameter down to 12.0 diameter. Pitch ranged from 4 to 6. I settled on the 13.0 diameter with 5 inch pitch..
The plane flew better with pitch lower than 5, but the motors did not like to Rev that high. Fuel was YS 20-20. By far, that was the best fuel for those motors.
One thing to be aware if is the variability of the Saito motor builds. I had one that was clearly better, so I set out to find out why. It seems that every one was slightly different. The cam lobe shape was not consistent nor was the assembly. Some were off a tooth on the cam timing as well.
Have fun playing with these.
One more question, Paul:
Do you remember how many RPM's were you launching at with the .72 and the 3 blade 13"x5"?
Thanks!
Claudio.
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It has been 20 years. Sorry, I don't remember.
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It has been 20 years. Sorry, I don't remember.
What?!?!?!
Well, there goes my plans for asking you detailed questions about what you were thinking when you built the weight box in your Atlantis. (Which now has all the lead dust cleaned out, the cover renewed, and has been refilled with BBs).
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What?!?!?!
Well, there goes my plans for asking you detailed questions about what you were thinking when you built the weight box in your Atlantis. (Which now has all the lead dust cleaned out, the cover renewed, and has been refilled with BBs).
I still have its twin brother. I can look at it! No memory needed!!
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It has been 20 years. Sorry, I don't remember.
Okay!
Thank you anyway...
Claudio.
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I still have its twin brother. I can look at it! No memory needed!!
I think I have it figured out as best as can be without cutting into it.
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>>>>Snip<<<<<
One thing to be aware if is the variability of the Saito motor builds. I had one that was clearly better, so I set out to find out why. It seems that every one was slightly different. The cam lobe shape was not consistent nor was the assembly. Some were off a tooth on the cam timing as well.
Have fun playing with these.
Interesting comments about the Saito engines. I found the same thing to be true. I didn't pull them apart to look but engine to engine consistency was lacking. I think in most RC applications it really wouldn't be noticed until one is really trying to get everything out of it in a high performance situation. But for cruising and looking badass in a warbird they are awesome! We ran them up on the edge for CLPA so it was noticeable. I had a 56 that out performed all of my other 4s motors. Until it was crashed and damaged beyond repair. :(
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Pfffft! I GIVE UP
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Pfffft! I GIVE UP
Definately .
Reg & Bruce built em , mightve binin Flying Muddles ?
(https://live.staticflickr.com/2902/13962467922_15f49ab404_b.jpg)
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Definately .
Reg & Bruce built em , mightve binin Flying Muddles ?
(https://live.staticflickr.com/2902/13962467922_15f49ab404_b.jpg)
Nope. Too Late. Too many other fish out there to slaughter. Thanks for the reply though. I was starting to think my question was in invisible or something.
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Are there any plans available for the P51?
I have an RSM kit for a P-51 that has box art in the Miss America paint scheme and shows a Saito four stroke in the nose on the plans. I think it's a Pat Johnston design? Is this any relation to Paul Walker's edition??
Type at you later,
Dan McEntee
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2004 WC
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Bruce Hoffman had / has / a ' green & gold ' miss America ' paint job one , simultaeneous( that word again ! Concurrent !!! ) with Mr Towells . A C L N 'd have pictures . around 2013 I think .
http://clamf.aerosports.net.au/?page_id=958
tsin there somewhere anyway .