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  #21  
Old 02-01-2007, 05:11 PM
RV7Guy's Avatar
RV7Guy RV7Guy is offline
 
Join Date: Jan 2005
Location: Chandler, AZ
Posts: 2,904
Default WW 200RV

Quote:
Originally Posted by Bill Palmer
Ron,



In other words, if you decide to go with an MT, you should research the model choices carefully and make sure you have a good performance match with your engine and RV-7.
Best Regards and Good Luck!

Bill Palmer
That is another reason I went with the Whirlwind 200RV. This prop was designed for the RV with the blade design optimized for the RV design.

Great performance, smooth an fast.
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Darwin N. Barrie
Chandler AZ
www.JDair.com
RV-7 N717EE-Flying (Sold)
RV-7 N717AZ Flying, in paint
EMS Bell 407,
Eurocopter 350 A-Star Driver
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  #22  
Old 02-01-2007, 07:11 PM
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captainron captainron is offline
 
Join Date: Jun 2006
Location: Cincinnati, OH
Posts: 837
Default

Quote:
Originally Posted by RV7Guy
That is another reason I went with the Whirlwind 200RV. This prop was designed for the RV with the blade design optimized for the RV design.

Great performance, smooth an fast.
Thanks Darwin, I'm going to take a close look at the Whirlwind prop.
Ron
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RV-7 N713CM reserved VAF # 603
Cincinnati
__________________________________________

"Wish I didn't know now what I didn't know then".
.....Bob Seger
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  #23  
Old 02-28-2007, 09:10 PM
210TC 210TC is offline
 
Join Date: Feb 2007
Location: New Braunfels Texas
Posts: 17
Default

I'm a cruser, 160 kts indicated (over 200 mph) and I can get my fuel burn under 9 GPH. Four blade MT built just for my airpane and nothing is smoother or as silent and I paid MUCH more than a Hartzel.
www.Landshort.com
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  #24  
Old 06-24-2007, 05:40 PM
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RV-4 Flyer RV-4 Flyer is offline
 
Join Date: Jun 2007
Location: Indianapolis
Posts: 27
Default Any reports on the new scimitar bladed MTV-17/18?

Anyone got any feedback on the newer blades (-57?) for the MTV's?
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  #25  
Old 06-25-2007, 10:36 PM
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RVjim RVjim is offline
 
Join Date: Mar 2005
Location: Southern California
Posts: 196
Default Current MT propellers

For the Lyc. 360 on an RV, the current MT propellers being sold are the following:

(hydraulic constant speed)
MTV-15-B/183-402 - An aluminum blade two blade propeller.

MTV-15-B/183-50 - A "natural composite" two blade propeller.

MTV-12-B/183-59b - A "natural composite" three blade propeller.

(electric constant speed)
MTV-20-B/183-50 - A "natural composite" two blade propeller.

MTV-18-B/183-59b - A "natural composite" three blade propeller.

All of these are 183 cm (72") diameter propellers.

Regards,
Jim Ayers
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  #26  
Old 06-25-2007, 11:19 PM
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RVjim RVjim is offline
 
Join Date: Mar 2005
Location: Southern California
Posts: 196
Default Lyc. 360 3 blade MT Propellers - clarification?

Two different 3 blade MT propellers have been commonly sold for RV's with the Lyc. 360 engine:

The earlier MTV-12-B/183-59,

and the current MTV-12-B/183-59b.

Both of these propeller designs have been vibration tested.
An easy way to determine this for any MT Propeller installation is to refer to the MT Propeller website, www.mt-propeller.com
Then select service documents,
Then select service bulletins.
Then select service bulletin # 1.
If the TBO is 1800 flight hours, or greater, then a vibration test has been completed for that specific propeller/engine combination.

The -59b blade design is a totally different blade design from the earlier -59 blade design. Although their appearance is very similar.

Van's Aircraft propeller testing was with the earlier -59 blade.
I do not know of any published flight test data from Van's Aircraft using the current -59b blade.

The earlier -59 blade had mid range RPM restrictions in the 2000 to 2300 RPM range.
The current -59b blade does not have a mid range RPM restriction on the Lycoming 360 engine, even with electronic ignition.

From statements made from flight test data in Australia, the MT 3 blade propeller with the -59b blades performs equal to the Hartzell 2 blade blended airfoil propeller.
Since I have found MT Propeller and Hartzell propeller chararteristics to be very dissimilar, I do not take this as an absolute statement. Only that it could have some relative merit, pending additional testing.

Regards,
Jim Ayers
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  #27  
Old 06-26-2007, 10:56 AM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
Default

I appreciate your information on the various MT models and new blade designs. Thanks!
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 441.0 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi2.htm


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  #28  
Old 06-26-2007, 11:56 AM
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Bob Brown Bob Brown is offline
 
Join Date: Dec 2005
Location: Somewhere in a motorhome
Posts: 581
Default you sure?

"I'm a cruser, 160 kts indicated (over 200 mph)"

Isn't 160 knots alot closer to 180mph instead of "over 200?" Might want to check on that...
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RV7A-QB, RV-10
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  #29  
Old 06-26-2007, 12:38 PM
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vmirv8bldr vmirv8bldr is offline
 
Join Date: Jun 2005
Location: Eastvale, CA
Posts: 378
Default Conversion Factor

I believe it's 1.15mph = 1 kt

160kts * 1.15 = 184mph
200kts * 1.15 = 230mph
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Bart Filipiak
Eastvale, CA
RV-8 N74VB

Barrett IO-390
WW200RV
FLYING!!!!!!!
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  #30  
Old 06-26-2007, 01:15 PM
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RVjim RVjim is offline
 
Join Date: Mar 2005
Location: Southern California
Posts: 196
Default

Quote:
Originally Posted by Bob Brown
"I'm a cruser, 160 kts indicated (over 200 mph)"

Isn't 160 knots alot closer to 180mph instead of "over 200?" Might want to check on that...
Not enough information was given. No altitude was mentioned.

With an INDICATED airspeed of 160 knots at 6,000' density altitude, the TRUE airespeed is 175 knots (over 200 mph).
For the same INDICATED airspeed, the TRUE airspeed would be higher for a DENSITY altitude above 6,000'.

Regards,
Jim Ayers
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