Boxxer kit ST .51 Prop.  
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All Forums >> RC Airplanes >> Profile and Fun Flying Planes >> OMP - Ohio Model Products Support Forum >> Boxxer kit ST .51 Prop. Page: [1]

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Boxxer kit ST .51 Prop. - 9/19/2007 4:38:07 AM   
P40 Maniac



Posts: 123
Joined: 8/23/2002
From: Grand Rapids, OH, USA
Status: offline 		Ok I have a boxxer kit with a ST .51. what prop do you think I should use for 3D.
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RE: Boxxer kit ST .51 Prop. - 9/19/2007 8:00:50 AM   
AKFireMedic



Posts: 806
Joined: 2/2/2004
From: Anchorage, AK, USA
Status: offline 		12x5 or 13x4 maybe?

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RE: Boxxer kit ST .51 Prop. - 9/19/2007 12:37:57 PM   
AFSalmon



Posts: 3735
Joined: 5/24/2002
From: Beavercreek, OH,
Status: offline 		That might be too much prop. You want a fast spool up time for 3D so maybe a 12-4. You'll just have to try a couple and see what works best for that engine. But the above are good starting points.

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RE: Boxxer kit ST .51 Prop. - 9/19/2007 11:06:44 PM   
TailTwister


 

Posts: 2849
Joined: 1/26/2002
From: Menasha, WI, USA
Status: offline 		And get a better muffler. The ST muffler is made of lead. I suggest the Macs one piece from Tower.

APC 12.25x3.75 is another option too...

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RE: Boxxer kit ST .51 Prop. - 9/20/2007 4:29:32 PM   
P40 Maniac



Posts: 123
Joined: 8/23/2002
From: Grand Rapids, OH, USA
Status: offline 		TailTwister how about a tuned pipe I have one that will fit just need a header for ST. I had on a .46 fx From plane recently crashed.

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RE: Boxxer kit ST .51 Prop. - 9/20/2007 10:14:27 PM   
TailTwister


 

Posts: 2849
Joined: 1/26/2002
From: Menasha, WI, USA
Status: offline 		I'm not a tuned pipe pipe fan. Loud as heck, and usually tuned higher than 3D can make good use of.

I had an Ultrathrust muffler on my ST, and it had a bit of a flat spot (lagged a bit in the middle) right where I wanted to fly it. It was frustrating...

The Macs is light, and no flat spot in the middle.

If you can tune the pipe for a solid torque ban, right in the middle, go for it!

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RE: Boxxer kit ST .51 Prop. - 9/22/2007 10:36:19 PM   
mrbigg



Posts: 2810
Joined: 10/30/2004
From: Streator, IL, USA
Status: offline
quote:

ORIGINAL: TailTwister

I'm not a tuned pipe pipe fan. Loud as heck, and usually tuned higher than 3D can make good use of.

I had an Ultrathrust muffler on my ST, and it had a bit of a flat spot (lagged a bit in the middle) right where I wanted to fly it. It was frustrating...

The Macs is light, and no flat spot in the middle.

If you can tune the pipe for a solid torque ban, right in the middle, go for it!

I was thinking of getting the Jett muffler for my .51, but now you have me wondering. I think the Ultrathrust and the Jett are similar. Did you get any gain out of the Mac's one piece? I don't want a flat midrange for sure. I had an 11x5 APC on it and it would hover the TMPRO 260 at half throttle. I have the APC 12.25x3.75 that I'm going to try tomorrow.

< Message edited by mrbigg -- 9/22/2007 11:28:12 PM >

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RE: Boxxer kit ST .51 Prop. - 9/22/2007 11:07:32 PM   
flightcrazed



Posts: 178
Joined: 3/18/2004
From: Gainesville, FL, USA
Status: online 		I put a beer bottle muffler on my ST51, it's also on my boxxer, I run a 12 X 4 prop, and it's all it can do to pull out of a hover.

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RE: Boxxer kit ST .51 Prop. - 9/22/2007 11:27:22 PM   
mrbigg



Posts: 2810
Joined: 10/30/2004
From: Streator, IL, USA
Status: offline
quote:

ORIGINAL: flightcrazed

I put a beer bottle muffler on my ST51, it's also on my boxxer, I run a 12 X 4 prop, and it's all it can do to pull out of a hover.


I just went out to change props and mine was an 11x4, not an 11x5. You got a pic of the beer bottle setup? What was your all up weight with the Boxxer?

< Message edited by mrbigg -- 9/22/2007 11:29:08 PM >

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RE: Boxxer kit ST .51 Prop. - 9/28/2007 3:34:53 PM   
mrbigg



Posts: 2810
Joined: 10/30/2004
From: Streator, IL, USA
Status: offline 		Put the 12.25x 3.75 on it and had a test flight. Hovering was worse with this prop than with the 11x4. Took about 3/4 throttle to hover compared to half before. Pull out was terrible also. Was a rocket out of a hover before with the 11x4.

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PROVERBS 15:22 - Plans go wrong for lack of advice; many counselors bring success.

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       Post #: 10

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All Forums >> RC Airplanes >> Profile and Fun Flying Planes >> OMP - Ohio Model Products Support Forum >> Boxxer kit ST .51 Prop.
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