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  #81  
Old 12-10-2017, 08:54 AM
Uptown2k's Avatar
Uptown2k Uptown2k is offline
 
Join Date: Apr 2017
Location: Deland, FL
Posts: 10
Default

Looking forward to these results
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Jordan
CFI/II
RV7 purchsed flying
Planning future build (RV-10)
VAF dues paid thru 06/2018
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  #82  
Old 01-22-2018, 06:45 AM
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Uptown2k Uptown2k is offline
 
Join Date: Apr 2017
Location: Deland, FL
Posts: 10
Default Any results???

Checking in to see if you had any numbers to share with us
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CFI/II
RV7 purchsed flying
Planning future build (RV-10)
VAF dues paid thru 06/2018
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  #83  
Old 01-22-2018, 09:51 AM
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Bob Martin Bob Martin is offline
 
Join Date: Jan 2005
Location: Richmond, Virginia
Posts: 1,082
Default Not yet

We have had some fitting issues, but getting them resolved.
Inital numbers are good/faster.
Main thing is 18 lbs lighter......prop and spinner combo.
Very pretty prop too...
I say this and it sounds hollow but it is true. A prop up until now has been a hunk of wood or metal with various paint jobs.
This prop has a finish that would rival the best paint job out there. Almost TOO pretty. One really has to be careful using powerful tools to torque nuts and safety wire etc around this prop.
Normally a prop just gets a cleaning or a wipe down, etc, but this prop begs for wax and to be taken care of.
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Bob Martin
RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
Louisa, Virginia KLKU N94TB
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  #84  
Old 02-10-2018, 07:58 PM
Northernliving Northernliving is offline
 
Join Date: May 2005
Location: Boston, MA
Posts: 79
Default Performance?

Quote:
Originally Posted by Bob Martin View Post
We have had some fitting issues, but getting them resolved.
Inital numbers are good/faster.
Main thing is 18 lbs lighter......prop and spinner combo.
Very pretty prop too...
I say this and it sounds hollow but it is true. A prop up until now has been a hunk of wood or metal with various paint jobs.
This prop has a finish that would rival the best paint job out there. Almost TOO pretty. One really has to be careful using powerful tools to torque nuts and safety wire etc around this prop.
Normally a prop just gets a cleaning or a wipe down, etc, but this prop begs for wax and to be taken care of.
Bob, any additional performance numbers on the prop?

Thanks, Brian
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Brian J.
Boston, MA
RV8 Based at ORH - Purchased
RV8 - The Dream - Under Construction
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  #85  
Old 02-11-2018, 10:21 AM
gereed75 gereed75 is offline
 
Join Date: Sep 2007
Location: pittsburgh pa
Posts: 491
Default Cg considerations

Bob, I am sure you have considered the effect on cg that this change will cause.

Several hundred hours ago, I switched from a 200rv to a hartzell Aluminum to gain 19 pounds on the nose. The cg moved from tending towards aft to right in the middle of the range. The flying characteristics are substantially improved. a 6 with aft range cgs can be very sensitive in pitch, have tendencies to bounce landings and limits aft baggage in a meaningful way.

Hope you are not going there.
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RV-6 IO-360
WW 200 RV now an Al Hartzell for improved CG
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  #86  
Old 02-13-2018, 12:26 PM
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Bob Martin Bob Martin is offline
 
Join Date: Jan 2005
Location: Richmond, Virginia
Posts: 1,082
Default

Quote:
Originally Posted by Northernliving View Post
Bob, any additional performance numbers on the prop?

Thanks, Brian
Brian,
No final numbers, preliminary numbers are good.
4mph faster at low cruise.
Time to climb to 8K was 6 seconds faster.

We had fitting issues with our James cowl and WW had us install a coarse stop ring in the hub. We are testing now for flight envelope. adjusting governor, etc. Once we are set, we will rerun the speed and time to climb tests.
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Bob Martin
RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
Louisa, Virginia KLKU N94TB
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  #87  
Old 02-13-2018, 12:33 PM
Bob Martin's Avatar
Bob Martin Bob Martin is offline
 
Join Date: Jan 2005
Location: Richmond, Virginia
Posts: 1,082
Default

Quote:
Originally Posted by gereed75 View Post
Bob, I am sure you have considered the effect on cg that this change will cause.

Several hundred hours ago, I switched from a 200rv to a hartzell Aluminum to gain 19 pounds on the nose. The cg moved from tending towards aft to right in the middle of the range. The flying characteristics are substantially improved. a 6 with aft range cgs can be very sensitive in pitch, have tendencies to bounce landings and limits aft baggage in a meaningful way.

Hope you are not going there.
Gary,
Thanks for the input. I will look at the W&B, we have a recent one!
Our -6 went from a wood prop to a metal Sensenich to a C/S Hartzel to a James cowl conversion that included a 2.25 extension.
So we have gotten heavier and pushed the heavy prop farther out.
Taking 18 lbs off the nose seems like a wonderful thing.
It also made our wallet thinner.
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Bob Martin
RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
Louisa, Virginia KLKU N94TB
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  #88  
Old 02-13-2018, 09:09 PM
gereed75 gereed75 is offline
 
Join Date: Sep 2007
Location: pittsburgh pa
Posts: 491
Default

Hmm, interesting journey. I thought at one time that the extended James cowl with composite prop might be the optimal six configuration. Go for it and good luck!
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Gary Reed
RV-6 IO-360
WW 200 RV now an Al Hartzell for improved CG
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