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  #11  
Old 05-16-2022, 07:25 AM
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BOHICA BOHICA is offline
 
Join Date: Oct 2020
Location: Austin
Posts: 139
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Quote:
Originally Posted by lipper03 View Post
Which two blade did you go with?
Hartzel 74" 2-blade Aluminum C2YR-1BFP/F7497
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2021 Donation Made
RV-14A 140892 building N914RS
QB expected Arrival Sep '22- Jan '23
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  #12  
Old 05-20-2022, 04:09 PM
lipper03 lipper03 is offline
 
Join Date: Sep 2021
Location: Fulshear, TX
Posts: 90
Default ordered 3 blade MT-12-B/188/59f

I ordered the MT-12-B/188-59f today after a few questions and pro/cons from Kevin in van's tech support. Excited!
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Brian

RV-14A
Build Started 12/31/21-
Section 6 complete 1/30/22
Section 7 complete 3/27/22
*Emp Ordered 9/27/21- Delivered 6/30/22
*QB Fuselage Ordered 11/3/21- Est 1Q23
*QB Wings Ordered 2/18/22- Est 2Q23
*YIO-390-EXP119 Engine Ordered 5/14/22- Est 2Q24
*Prop Ordered 5/20/22- Est March 23
*Finishing Kit ordered 6/25/22- Est Sept 23
https://eaabuilderslog.org/?s=RV14A2021

PA-28-236 N419SB
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  #13  
Old 05-20-2022, 04:39 PM
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Walt Walt is online now
 
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Location: Dallas/Ft Worth, TX
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Quote:
Originally Posted by lipper03 View Post
I ordered the MT-12-B/188-59f today after a few questions and pro/cons from Kevin in van's tech support. Excited!
You may want to talk to the folks at McFarlane about your choice (plus I think they can offer a better price than Van's).
No restriction on the MTV-9, probably less maintenance due to the heavy duty hub, ok with EI and higher compression.
I personally chose the -9 to run on my IO-370.

ē MTV-9 Heavy-Duty 3-blade hub is recommended over the MTV-12 series for use on engines without counter-weights,
and for engines with 'more than stock output'
ē MTV-12-B/183b Medium-Duty hub is limited for use on engines with factory timing, standard compression and 6th
order dampened crankshafts - it may also require restricted RPM operation ranges.
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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 2000+ hrs, New Titan IO-370, Bendix Mags, MTV-9 prop
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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  #14  
Old 05-20-2022, 06:25 PM
lipper03 lipper03 is offline
 
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Location: Fulshear, TX
Posts: 90
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Well thatís why I was asking vans, they didnít say there was a restriction or limitation, McFarland can confirm that?

Quote:
Originally Posted by Walt View Post
You may want to talk to the folks at McFarlane about your choice (plus I think they can offer a better price than Van's).
No restriction on the MTV-9, probably less maintenance due to the heavy duty hub, ok with EI and higher compression.
I personally chose the -9 to run on my IO-370.

ē MTV-9 Heavy-Duty 3-blade hub is recommended over the MTV-12 series for use on engines without counter-weights,
and for engines with 'more than stock output'
ē MTV-12-B/183b Medium-Duty hub is limited for use on engines with factory timing, standard compression and 6th
order dampened crankshafts - it may also require restricted RPM operation ranges.
__________________
Brian

RV-14A
Build Started 12/31/21-
Section 6 complete 1/30/22
Section 7 complete 3/27/22
*Emp Ordered 9/27/21- Delivered 6/30/22
*QB Fuselage Ordered 11/3/21- Est 1Q23
*QB Wings Ordered 2/18/22- Est 2Q23
*YIO-390-EXP119 Engine Ordered 5/14/22- Est 2Q24
*Prop Ordered 5/20/22- Est March 23
*Finishing Kit ordered 6/25/22- Est Sept 23
https://eaabuilderslog.org/?s=RV14A2021

PA-28-236 N419SB
KIWS

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  #15  
Old 05-20-2022, 07:21 PM
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Walt Walt is online now
 
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Quote:
Originally Posted by lipper03 View Post
Well that’s why I was asking vans, they didn’t say there was a restriction or limitation, McFarland can confirm that?
Suggest you reach out to McFarlane prop guys (very experienced with MT) or MT itself for more info.

Note the warning on Van's page (not approved for EI):

WARNING: Damage or excessive wear to the engine or propeller may occur if electronic ignition systems are used and timing is
set to a value other than the fixed timing stated by the manufacture (for Lycoming this is labeled on the engine dataplate).4-cylinder
engines 195hp and above must include 6th order crankshaft counterweights and operate within the engine manufacture's timing specifications if electronic ignitions are installed when using the following propellers MTV-12, MTV-15, MTV-18, MTV-20 and MT 185. Lycomings electronic ignition system (EIS) for both standard timing (matching the fixed timing used previously on Slick magnetos') and the advanced timing curve are allowed for use with the following propellers MTV-12, MTV-15, MTV-18, MTV-20 and MT 185. MTV-9-B/183-50a propeller must be used with 4-cylinder engines 195hp and above if 6th order crankshaft counterweights are not installed or electronic ignitions are installed that are operated outside the engine manufactures timing specifications.

The -9 hub was made for higher HP engines, thus handles more 'abuse' without strain (=lower mntc costs).

See this thread for discussion on this subject:
https://vansairforce.net/community/a.../t-192407.html

Type certificate data sheets for MT can be found here:
https://www.mt-propeller.com/en/entw/pro_hydr.htm

Maximum Continuous Power @2700:
-12 = 300, 44 lbs
-9 = 421, 53 lbs
__________________
Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 2000+ hrs, New Titan IO-370, Bendix Mags, MTV-9 prop
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154

Last edited by Walt : 05-21-2022 at 05:45 AM.
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  #16  
Old 05-20-2022, 07:29 PM
lipper03 lipper03 is offline
 
Join Date: Sep 2021
Location: Fulshear, TX
Posts: 90
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Thanks Walt, I'll ask McFarland, now that I'm freaking out!
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Brian

RV-14A
Build Started 12/31/21-
Section 6 complete 1/30/22
Section 7 complete 3/27/22
*Emp Ordered 9/27/21- Delivered 6/30/22
*QB Fuselage Ordered 11/3/21- Est 1Q23
*QB Wings Ordered 2/18/22- Est 2Q23
*YIO-390-EXP119 Engine Ordered 5/14/22- Est 2Q24
*Prop Ordered 5/20/22- Est March 23
*Finishing Kit ordered 6/25/22- Est Sept 23
https://eaabuilderslog.org/?s=RV14A2021

PA-28-236 N419SB
KIWS

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  #17  
Old 05-20-2022, 07:44 PM
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Walt Walt is online now
 
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Quote:
Originally Posted by lipper03 View Post
Thanks Walt, I'll ask McFarland, now that I'm freaking out!
No need to freak out, lots of folks use the -12, the cost for the -9 is 'only' about 1k more, to me it was worth it.
If you plan on ever running Pmags or any other EI then the -12 is not recommended.
__________________
Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 2000+ hrs, New Titan IO-370, Bendix Mags, MTV-9 prop
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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  #18  
Old 05-20-2022, 07:59 PM
lipper03 lipper03 is offline
 
Join Date: Sep 2021
Location: Fulshear, TX
Posts: 90
Default

Haha Iím using pmags
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Brian

RV-14A
Build Started 12/31/21-
Section 6 complete 1/30/22
Section 7 complete 3/27/22
*Emp Ordered 9/27/21- Delivered 6/30/22
*QB Fuselage Ordered 11/3/21- Est 1Q23
*QB Wings Ordered 2/18/22- Est 2Q23
*YIO-390-EXP119 Engine Ordered 5/14/22- Est 2Q24
*Prop Ordered 5/20/22- Est March 23
*Finishing Kit ordered 6/25/22- Est Sept 23
https://eaabuilderslog.org/?s=RV14A2021

PA-28-236 N419SB
KIWS

VAF donation 2021/22

CAF Member
EAA Member
AOPA Member
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  #19  
Old 05-21-2022, 05:34 AM
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MS19087 MS19087 is offline
 
Join Date: Nov 2006
Location: West Chester, PA
Posts: 802
Default Running Hartzell 3 blade composite- no CG issues

I have an exp119 WITH accessory case. So a bit heavier than the normal-119. In fact when Iím solo I put ballast in the luggage area. Otherwise I canít get a nice flare on landing. My CG stays within limits under all scenarios assuming gross weight is observed.
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RV-9A; Built, Flown & Sold
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  #20  
Old 05-21-2022, 06:16 PM
lipper03 lipper03 is offline
 
Join Date: Sep 2021
Location: Fulshear, TX
Posts: 90
Default

I did get a change to talk to Larry at McFarland today, and both 9 and 12 are acceptable. The 12 does have a shorter recommenced TBO and may see bearing wear more then a 9, but no safety of flight or RPM or other limitations for an RV14A with a EXP119. I'm checking back with Vans to make sure I understand the color options and delivery assembly vs ordering with McFarland. Thanks Walt for the suggestion!
__________________
Brian

RV-14A
Build Started 12/31/21-
Section 6 complete 1/30/22
Section 7 complete 3/27/22
*Emp Ordered 9/27/21- Delivered 6/30/22
*QB Fuselage Ordered 11/3/21- Est 1Q23
*QB Wings Ordered 2/18/22- Est 2Q23
*YIO-390-EXP119 Engine Ordered 5/14/22- Est 2Q24
*Prop Ordered 5/20/22- Est March 23
*Finishing Kit ordered 6/25/22- Est Sept 23
https://eaabuilderslog.org/?s=RV14A2021

PA-28-236 N419SB
KIWS

VAF donation 2021/22

CAF Member
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