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

props for Rossi .53

Reply

Old 07-31-2008, 07:33 AM
  #1  
windcosmic
Thread Starter
My Feedback: (14)
 
Join Date: Feb 2008
Location: Vicenza, ITALY
Posts: 267
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default props for Rossi .53

Hi! I am wondering if the Rossi .53 could be run with QM .40 props..
windcosmic is offline  
Reply With Quote
Old 07-31-2008, 09:29 AM
  #2  
wjvail
My Feedback: (3)
 
wjvail's Avatar
 
Join Date: Sep 2002
Location: Meridian, MS
Posts: 652
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: props for Rossi .53

While I do own a Rossi .53, I've never run that small a prop on it. My understanding is that QM40s routinely turn 23,000+ rpm and I'm certain that even if the Rossi held up at these speeds, it was not designed for them. You might find good performance in the 18 to 19 thousand range but probably not in the 20,000+ range.

I which I had hard data for you.

Bill
wjvail is offline  
Reply With Quote
Old 07-31-2008, 01:39 PM
  #3  
YUKONFLYR
 
YUKONFLYR's Avatar
 
Join Date: Apr 2007
Location: WHITEHORSE, YT, CANADA
Posts: 411
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: props for Rossi .53

Rossi's do scream however the port timing is not set up to run in the mid 20k in rpm. It would spin the q40 ok but its timing might hold it back to about 21k or so.

If its timing were changed, then it would probably run just fine in the upper rpms, at the cost of a reliable idle...possibly.

YUKONFLYR is offline  
Reply With Quote
Old 07-31-2008, 02:47 PM
  #4  
windcosmic
Thread Starter
My Feedback: (14)
 
Join Date: Feb 2008
Location: Vicenza, ITALY
Posts: 267
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: props for Rossi .53

Thank you all for the replies.. I will try.. Only hope to don't damage the engine
windcosmic is offline  
Reply With Quote
Old 07-31-2008, 11:26 PM
  #5  
Mike Connor
Senior Member
My Feedback: (5)
 
Mike Connor's Avatar
 
Join Date: Jan 2002
Location: Tulsa, OK
Posts: 2,025
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: props for Rossi .53


ORIGINAL: windcosmic

Hi! I am wondering if the Rossi .53 could be run with QM .40 props..
The Rossi 53 is timed for torque, not rpm. A 9x10 or 10x8 prop would work well with that engine. I would think the QM prop would be horrible with this engine but maybe the light load would let it hit a higher harmonic tuning level and let it spin. Let us know what happens.
Mike Connor is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service