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RE: Props-More Myths Busted - 1/31/2007 7:06:49 PM   
Hobbsy



Posts: 10678
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Here's one thing I hate about APCs, the hole being drilled crooked, I drilled it so the offset made no difference and then put a tru-Turn bushing in the back to accurately center it. When I spun it on the Robart balancer the blade tips tracked about 3/8ths inch apart. The 15x6 that came with it is perfect.

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< Message edited by Hobbsy -- 1/31/2007 7:07:17 PM >

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RE: Props-More Myths Busted - 1/31/2007 7:20:19 PM   
Flyboy Dave



Posts: 13449
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: offline
quote:

ORIGINAL: speedster 1919

quote:



I dont buy for a minute that the Zinger beats the APC. I think Flyboy Dave has such a pro Zinger agenda that he will say anything, or even twist the results to make APC look bad. I will be testing for myself, and publishing the vidoes with each prop. I have live telemetry that shows speed readouts of the plane, and rate of climb info, I will be testing an APC 12x6 against the Zinger 12x6 on a typical .46 sized aerobatic semi - symetrical wing trainer. No twisting of results, no spin, you all will be able to see the video with data for yourselves

Yes Dave I'm waiting for Jett pilot test too. But he takes one thing for granted---He assumes a 12x6 APC and Zinger are the exactly the same.


Yeah....and he said he's going to put a 12-6 on a .46....that should be exciting, huh ?

FBD.....still waiting for the test.


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A mechanic says..."Oh yeah, watch this".
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RE: Props-More Myths Busted - 2/1/2007 12:04:06 PM   
speedster 1919



Posts: 1467
Joined: 12/17/2004
From: Martinsville, IN, USA
Status: offline 		Jaka MAS has changed the 11" and under to the new GF/3 series . This makes your old assmptions out dated.

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Hey Buddy -That was the most spectacular crash I've ever seen , That rolling cart wheel with parts slinging out was cool...

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       Post #: 203

RE: Props-More Myths Busted - 2/1/2007 12:19:04 PM   
speedster 1919



Posts: 1467
Joined: 12/17/2004
From: Martinsville, IN, USA
Status: offline
quote:

ORIGINAL: jaka

Hi!
Small MA props out performing APC´s??...No way! take any 7",8",9",10",11"12," APC and it will out perform any MA prop.


OK Jaka you said any prop ! Here is your mission if you decide to accept it.

I think you have some brand of 46 engine. Take a 10x8 APC and a 10x8 MAS GF/3 (must be GF/3) Take your tach and fish scale and tune to your precious APC and then slap on the MAS without a retune and give us the results.---I got 7oz more thrust on just a 30 RPM difference on the MAS. Put your money were your mouth is and prove me wrong............

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Hey Buddy -That was the most spectacular crash I've ever seen , That rolling cart wheel with parts slinging out was cool...

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       Post #: 204

RE: Props-More Myths Busted - 2/1/2007 1:37:01 PM   
Strat2003


 

Posts: 613
Joined: 3/9/2003
From: Mt. Pleasant, OH, AFGHANISTAN
Status: offline 		Taking the risk of jumping in on a long thread I haven't completely read.....

I fly SAM old timers and have found several times that the prop that pulls the hardest, or the one that revs the highest, does not result in the highest launch altitude. The engine, prop, and airplane are a system and what works best in one application may not work best in another. I, or more correctly, my wife/launcher, has noticed that MA props pull harder but only give the best climb on lower-reving engines like the Fox .35. My Jett .35 and Super Tigre G21 .29 consistently get higher with the APCs.

(in reply to speedster 1919)
       Post #: 205

RE: Props-More Myths Busted - 2/1/2007 4:00:06 PM   
Flyboy Dave



Posts: 13449
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: offline 		That's what makes this statement complete horsepucky....

quote:

ORIGINAL: jaka

Hi!
Small MA props out performing APC´s??...No way! take any 7",8",9",10",11"12," APC and it will out perform any MA prop.


APC props are too ugly to put on the front of an airplane.

FBD.


_____________________________

An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
"Old Age, and Treachery will overcome youth and skill".
Revver Bro #4.

(in reply to jaka)
       Post #: 206

RE: Props-More Myths Busted - 2/1/2007 4:10:42 PM   
jaka


 

Posts: 4526
Joined: 12/11/2001
From: Upplands Vasby, SWEDEN
Status: offline 		Hi!
OK Speedster..I will try it out!
But remember ....I'm not after pulling power or high rpm ...that's not wort a thing. It's what happens with the airplane in the air that counts!

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RE: Props-More Myths Busted - 2/1/2007 4:35:24 PM   
proptop



Posts: 4497
Joined: 10/18/2002
From: Rome, NY, USA
Status: offline 		FWIW, we have a few guys with those WM Skyraiders..the low wing, looks sorta like a quickie 500...

One guy has an AX .46 on his, with Tower muffler...

I told him to switch from the 11 X 4 (APC ) that he had on there to either a 10 X 7 or 10 X 8 (I neglected to say APC...I just figured that's what he'd buy )

Next time out, he's flying it and the prop is SINGING the loudest, most ear piercing obnoxious noise I've ever heard!
I asked him what prop and he sez "10 X 8... just like you said"...I said "hmmm"
Anyway...after he lands I see that it's a MAS 10 X 8 GF/3 and I figured that the tips were going sonic ( or dang close to it )
I gave him a 10 X 8 APC and the airplane was noticeably faster and a LOT quieter...
FWIW

< Message edited by proptop -- 2/1/2007 4:37:54 PM >

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RE: Props-More Myths Busted - 2/1/2007 4:50:16 PM   
MJD


 

Posts: 1687
Joined: 5/27/2003
From: Orangeville, ON, CANADA
Status: offline
quote:

ORIGINAL: Hobbsy

Here's one thing I hate about APCs, the hole being drilled crooked, I drilled it so the offset made no difference and then put a tru-Turn bushing in the back to accurately center it. When I spun it on the Robart balancer the blade tips tracked about 3/8ths inch apart. The 15x6 that came with it is perfect.


I spoke to APC about this. They admitted that the post drilling operation was not perfect (no s**t Sherlock, it's terrible!), and that the props should always be indexed via the molded recess in the rear of the hub which is on center. I now never, ever rely on the drilled hole, and ream it slightly oversize, then use a bushing in the rear of the hub. Pain in the butt but it solves the problem and allows these otherwise excellent props to be used.

MJd

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       Post #: 209

RE: Props-More Myths Busted - 2/2/2007 12:42:24 AM   
Harry Lagman


 

Posts: 1152
Joined: 11/19/2003
From: Auckland, NEW ZEALAND
Status: offline 		Good heads-up on the APC drilling, MJD and Hobbsy. Thanks for sharing.

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       Post #: 210

RE: Props-More Myths Busted - 2/2/2007 1:23:53 AM   
Big Bopper



Posts: 44
Joined: 3/3/2006
From: Palmdale, CA, USA
Status: offline 		I would not tolerate miss-drilled props. Send them back to the manufacturer.
When the APC throws a blade, the blame will now be on you, not the
manufacture because you modified the prop. Do you have good insurance?

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       Post #: 211

RE: Props-More Myths Busted - 2/2/2007 1:36:20 AM   
wildchild45177



Posts: 463
Joined: 7/19/2005
From: wilmington, OH, USA
Status: offline 		Why even bother with the APC vs Zinger Vs MAS crap. Just get a real prop Xoar Menz Mejzlik or something along those lines.

Bob

< Message edited by wildchild45177 -- 2/2/2007 1:37:45 AM >

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       Post #: 212

RE: Props-More Myths Busted - 2/2/2007 5:03:44 AM   
RVM


 

Posts: 1975
Joined: 3/12/2006
From: Sacramento, CA, USA
Status: offline 		Because those aren't made in all sizes.


quote:

ORIGINAL: wildchild45177

Why even bother with the APC vs Zinger Vs MAS crap. Just get a real prop Xoar Menz Mejzlik or something along those lines.

Bob



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RE: Props-More Myths Busted - 2/2/2007 10:32:48 AM   
speedster 1919



Posts: 1467
Joined: 12/17/2004
From: Martinsville, IN, USA
Status: offline 		Proptop That wasn't the prop tips going sonic making that noise. That was the plane flying fast enough to start to flutter. HAW You were so fixsated listening to noise you didn't notice plane flying faster. HAW We noticed this at our field.

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Hey Buddy -That was the most spectacular crash I've ever seen , That rolling cart wheel with parts slinging out was cool...

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       Post #: 214

RE: Props-More Myths Busted - 2/2/2007 10:54:05 AM   
speedster 1919



Posts: 1467
Joined: 12/17/2004
From: Martinsville, IN, USA
Status: offline 		Jaka All I ask for is a fair test and so far we just have static RPM and thrust to go by.
Good News--- I just bought and got in 5 BOLLY PROPS from my favorite rock star LED ZEPPLIN in Israel . I am impressed. If you lay down side by side 9,10,11,12and a half sizes they all look simetrical to each other just like all sizes of MAS. Unlike APC that has different twists and widths . They are a neat brown and look like the average APC but not as sharp. I wonder if their color running will show up better than the APC gray. The odd .5 inch I will have to match up with a different pitch and size to make comparison.
PS sorry Dar I just had to do that..........

_____________________________

Hey Buddy -That was the most spectacular crash I've ever seen , That rolling cart wheel with parts slinging out was cool...

(in reply to jaka)