VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-4
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 09-20-2014, 07:32 PM
psalter psalter is offline
 
Join Date: Dec 2006
Location: Beaumont, TX
Posts: 55
Default Aymar Demuth to Catto 3 blade

Neal,

I miss the Christin Eagle sometimes, but the RV is such a relaxing and fun plane to fly, I am glad I made the trade. Tell Tim hello for me.

Phil
Reply With Quote
  #12  
Old 10-13-2014, 04:54 PM
Karbonkid Karbonkid is offline
 
Join Date: Oct 2012
Location: Ny, Fl, Co
Posts: 15
Default

OK, slow progress on getting real numbers but I do have close ones that I will narrow down in the next week or so.

This weekend I flew from new orleans over to the thomasville, GA fly in. Fun time nice group and great food. I only stayed for sat but many were camping over the weekend.

so, on the way back
10,500
2400 rpm ~140mph ind /168 true
2500 rpm ~148mph ind / 177 true

The A/D was ~10mph faster

two things that come to mind, the three blade has a larger diameter nosecone and I am now running 20lb crushplate.

would you guys expect these to reduce speed by ~10mph?

just looking for similar experiences and thoughts.

I am very happy with the prop and it is smooth now that I rotated 1 bolt hole clockwise (why this did anything I have no idea)
Reply With Quote
  #13  
Old 10-13-2014, 06:12 PM
AZtailwind's Avatar
AZtailwind AZtailwind is offline
 
Join Date: Nov 2005
Location: Flagstaff, AZ
Posts: 447
Default

Quote:
Originally Posted by Karbonkid View Post
OK, slow progress on getting real numbers but I do have close ones that I will narrow down in the next week or so.

so, on the way back
10,500
2400 rpm ~140mph ind /168 true
2500 rpm ~148mph ind / 177 true

The A/D was ~10mph faster

two things that come to mind, the three blade has a larger diameter nosecone and I am now running 20lb crushplate.

would you guys expect these to reduce speed by ~10mph?

just looking for similar experiences and thoughts.

I am very happy with the prop and it is smooth now that I rotated 1 bolt hole clockwise (why this did anything I have no idea)
Did you measure both props at full throttle?

A measure at WOT at the similar weather conditions and altitude. That would be your best static data point to start from. If you have accurate fuel flow and MAP measurement- use those also. Then you could measure similar power settings/conditions at what TAS. The RPM setting is a minor power data point with different prop comparisons since that will vary.
__________________

Brad Ransom
http://www.westcoastravens.com
RV-6A 180HP-acquired
RV-4 180HP-acquired
Reply With Quote
  #14  
Old 10-15-2014, 09:27 AM
Karbonkid Karbonkid is offline
 
Join Date: Oct 2012
Location: Ny, Fl, Co
Posts: 15
Default

You know I never thought about it, I have no idea what my power setting is with my setup ... Just picking rpm at altitude. I will get wot at altitude so then approx power setting is known.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 08:19 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.