03-03-2008, 03:55 AM #1
Is there a 15/19 & and a 15/19R???
Are these 2 different props?
What are the differences?
I have noticed that some props have the pitch numbers on the outside of the prop between the blades but mine has 15/19 (not R) scribed into the inside of the hub where the thread is.
03-03-2008, 05:00 AM #2
- Join Date
- Nov 2007
- Lincoln, NE
I think the R means it was put on a pitch-block to re-check the pitch before they send it out.
Last edited by N8T; 03-03-2008 at 05:03 AM. Reason: spelling
03-03-2008, 05:14 AM #3
The R prop is a Riva pitched prop designed to use with their stage 3 setup. A 15/19 is little taller than a 15/19R.
Last edited by ou812; 03-03-2008 at 05:24 AM.
03-03-2008, 06:17 AM #4
I tested my ski this weekend with rude charger, RR IC, stock ECU etc and it was on the limiter at about 3/4 throttle, I though this prop would be shorter than the R.
Which prop is considered better out of the 2 for my set-up (will have RR ECU etc)
03-03-2008, 08:11 AM #5
The R props are better. They are pitch blocked and checked for accuracy. With the non R props i have meausured the blades and they are all over the place.
Same goes for 15/20R and non R props.
03-03-2008, 09:45 AM #6
The Skat 15/19r also is lighter than the standard 15/19. if you compare the two on the back side, you will see the difference.
03-03-2008, 10:06 AM #7
So if I take my 15/19 (non R) to a prop shop and have them check the pitch for accuarcy and add 3mm to the trialing edge I should be OK?
03-03-2008, 10:45 AM #8
there may be accuracy differences in the props trailing edges from the get go but that can be fixed what cant be is the REAL differences..........the 15/19R & 15/20R are cast lighter with less MATERIAL BEHIND THE NOSE PORTION OF THE PROPS than the regular 15/19 & 15/20 these BLADES are drilled behind the nose to be made lighter..........the R props are cast WITHOUT the extra weight in them..hence they should spin more accurately and be balanced better from the get go and maybe rev faster........when u drill to loose weight u have to be somewhat precise and make sure u dont set it off balance.........hence the R props should be more balanced .........just my observation of the two........ as i have had BOTH!
Last edited by REID2168; 03-03-2008 at 10:53 AM.
03-03-2008, 11:14 AM #9
03-03-2008, 11:28 AM #10
the whole weight thing is kind of inaccurate i believe... maybe in the very beginning, but not so much in the past year at least..
skat 3-blade ultra-lite..
well here's a "demonstration" if u will that was passed along the vine to me at the time of the "R" prop introduction
weights/mass not different
and yes the skat prop had more pitch in it
check this pdf file
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