Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

prop question for rossi

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Old 03-22-2007, 12:22 PM
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BigBadJon
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Default prop question for rossi

getting ready to order more props. i reached the bottom of my stock lol
for a rossi 53 and UT pylon muffler, would a 9x8 be good? trying to make sure i get the rpms for the muffler. which ithink said about 16k. rpm.
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Old 03-22-2007, 12:59 PM
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Mike Connor
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Default RE: prop question for rossi


I know the web site said 16,000-20,000 rpm for the pylon muffler but I am questioning that. I know Bob B. with Jett says the black Q-500 pylon racing muffler Jett sells is tuned for 18,000 - 20,500 rpm. Maybe Bob or Daven could confirm the rpm range of your muffler. If 18,000 is the bottom end, the 9x8 sport prop may be too much load. The 8.8 pylon props may be better suited.
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Old 03-22-2007, 01:47 PM
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bob27s
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Default RE: prop question for rossi

Im not sure, but I think the PSP 'race' muffler is tuned more along the lines of the Jett SS (or LX) muffler. So hitting something along the lines of 17K - 18K would be in the sweet spot.

If it is the same as the standard nelson racing muffler, than 17K would be the bottom limit to get it to stage.

Standard blade 9x8 would be good in any case - Id look into aquring an 8.8x8.75 and 8.8x8x9 too. The .53 will swing those easily.
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Old 03-22-2007, 10:46 PM
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Julian537
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Default RE: prop question for rossi

the exhaust timing on the rossi 53 is not as high as some of the other motors out there. It does not like to rev over 18k. Try to load it with a prop that hits 16 to 16.5 on the ground. It will unload in the air and get ou close to the mid 17's.
I have tried to rev my rossi 53 high and it does not like it! go with an 8.8 x 9.25 or 8.8 x 8.75
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Old 03-23-2007, 01:18 AM
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Default RE: prop question for rossi

I'd go with any of the APC 40 class 'Pylon' props like the 8.8x8.75 or 8.8x9w with the thick D series hubs, the 9" 'Sport' props (C hub) are rated at 21K but I've slung a few of them apart at that RPM and it's not a pretty sight, the D's have a 1/2" thick hub and I've yet to sling one apart.

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