Q-500 Racing Discuss AMA 428, AMA 424, and any other variants of Quickie 500 racing

Prop for Vipper

Reply

Old 03-19-2008, 02:36 PM
  #1  
BUDMAN27
Thread Starter
 
BUDMAN27's Avatar
 
Join Date: Mar 2006
Location: Galveston, TX
Posts: 1,591
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Prop for Vipper

I put a Jett Q-40 (older styl) not the new long stroke on a GP Vipper. At this time I have a APC Carbin 7.4x8 on it (have not flone it yet) I was just wondering what you guys thought I should use. Not planing on racing her just put it together for some fun.
BUDMAN27 is offline  
Reply With Quote
Old 03-19-2008, 02:38 PM
  #2  
BUDMAN27
Thread Starter
 
BUDMAN27's Avatar
 
Join Date: Mar 2006
Location: Galveston, TX
Posts: 1,591
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

Sorry I allways misspell Viper when I,m in a hurry.
BUDMAN27 is offline  
Reply With Quote
Old 03-19-2008, 03:01 PM
  #3  
fizzwater2
My Feedback: (60)
 
Join Date: Aug 2004
Location: Paola, KS
Posts: 2,765
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

You might post this question over on the Jett factory support forum, Bob might have some inputs.

fizzwater2 is offline  
Reply With Quote
Old 03-19-2008, 09:32 PM
  #4  
daven
Senior Member
My Feedback: (1)
 
Join Date: Dec 2001
Location: Waseca, MN
Posts: 8,455
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

The 7.4x8 is most likely too heavy of pitch to get it going.

Try the 7.4x7.5 and get the RPM up.
daven is offline  
Reply With Quote
Old 03-19-2008, 11:15 PM
  #5  
BUDMAN27
Thread Starter
 
BUDMAN27's Avatar
 
Join Date: Mar 2006
Location: Galveston, TX
Posts: 1,591
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

Cool
BUDMAN27 is offline  
Reply With Quote
Old 03-19-2008, 11:15 PM
  #6  
HighPlains
My Feedback: (1)
 
Join Date: Mar 2003
Location: Over da rainbow, KS
Posts: 5,085
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

Not enough diameter.
HighPlains is offline  
Reply With Quote
Old 03-23-2008, 10:56 PM
  #7  
BUDMAN27
Thread Starter
 
BUDMAN27's Avatar
 
Join Date: Mar 2006
Location: Galveston, TX
Posts: 1,591
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

I think Highplanes is right. It looks a little to little for a Viper. I beleave a 8x8 or 8x7 would look more at home on this bird.
BUDMAN27 is offline  
Reply With Quote
Old 03-23-2008, 11:00 PM
  #8  
garys
Senior Member
 
Join Date: Jan 2002
Location: Stansbury Park, UT
Posts: 937
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

Then you need a different engine. A few people tried Q40 engines on Q500's around 1994-95, but they were slower than Q500 engines because of the prop.
garys is offline  
Reply With Quote
Old 03-23-2008, 11:24 PM
  #9  
BUDMAN27
Thread Starter
 
BUDMAN27's Avatar
 
Join Date: Mar 2006
Location: Galveston, TX
Posts: 1,591
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

Thanks gary thats good to know.
BUDMAN27 is offline  
Reply With Quote
Old 03-23-2008, 11:28 PM
  #10  
HighPlains
My Feedback: (1)
 
Join Date: Mar 2003
Location: Over da rainbow, KS
Posts: 5,085
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

I broke in my first Nelson Q40 engine on a quickie. It went pretty well with a 8 3/4 x 6 1/2 Rev-Up cut down to 8" diameter. You might get a 7 pitch to work. But at best, it would be down from a quickie timed engine and prop combination by about 10 mph. If there is a shim under the sleeve, removing it and adding shims to the head will help slightly.
HighPlains is offline  
Reply With Quote
Old 03-23-2008, 11:42 PM
  #11  
BUDMAN27
Thread Starter
 
BUDMAN27's Avatar
 
Join Date: Mar 2006
Location: Galveston, TX
Posts: 1,591
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Prop for Vipper

Coolbeans
BUDMAN27 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