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05-28-2020, 07:44 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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Quote:
Originally Posted by Pilot135pd
I thought I read here on the forum that the -7 and -8 wing were the same but it shows here the -8 is a foot shorter.  Still looks like the best plane performing overall though  |
The difference in wingspan is due to the narrower fuselage of the -8.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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05-28-2020, 07:47 AM
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Join Date: Aug 2007
Location: Oshkosh
Posts: 208
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Very cool, and very interesting. Thanks for putting this together!
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Cheers!
Joe
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05-28-2020, 07:52 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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The comparison I like to do, and don't see on your chart is to "normalize" the data, meaning for the -3, -4, -7, -8, and -9, list the numbers all with an (I)O-320 160 hp engine.
As I was looking at the Van's site last night, I noticed the -4's numbers were produced with a fixed pitch wood prop. Whereas the -7, -8, and -9's were all produced with Hartzell two bladed CS propellers. While this may not impact cruise speed and max speed, it will impact climb rate and takeoff distances.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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05-28-2020, 08:17 AM
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Join Date: Oct 2011
Location: Kennesaw, Ga
Posts: 824
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I noticed you have 200 for the engine on the RV-7s. Is this more common than the 180 for the -7s? Just wondering, not trying to correct you or question your sheet, just wondering if there are more RV7s out there with a 200 hp than ones with 180. I have a -7 with a 180, and flew it for 5 years with a wood prop that gave me great cruise speed but not so great take off power. After replacing it with a C/S prop, I was delighted to get most of the HP on take off and felt like I was flying a different airplane (one way more Bad A__ ). Now I'm thinking to myself, "Self, you are missing out on 20 to 30 more horses" 
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Amir
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RV-7
RV-10 - Sold
Supporting VAF since the first visit 
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05-28-2020, 08:25 AM
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Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,428
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RV-3 max baggage weight is 50 pounds.
Dave
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05-28-2020, 08:49 AM
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Join Date: Feb 2008
Location: Largo, FL
Posts: 1,027
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Useful load vs Payload
In this context, gross weight minus empty weight is useful load -- payload is useful load minus fuel weight/extras.
Ron
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RV-10 Co-built, maintained, flown (sold)
RV-8A Maintained and flown (Sold)
RV-6A Bought and Flying (N177RV), upgrades $$$
IO360, 180HP/CS, AFS 5600T, D10A, G650, G430, G327, ADS-B, VIZ385 AP
Very Happy Contributor
Comm, SMEL, CFII, A&P
Based at KCLW (Clearwater, FL)
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05-28-2020, 09:13 AM
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Join Date: Apr 2010
Location: Covid Country-SoCal
Posts: 1,081
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Interesting that there is no baggage weight listed for the -10.
-Marc
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RV-10
N814RV
2020 Donation Made
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05-29-2020, 08:14 AM
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Join Date: Jan 2005
Location: Roy, Utah
Posts: 1,141
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Per the factory, the baggage limit on the -9A is 100 lbs, W&B permitting.
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Five Sierra Fox
RV-9A
Utah
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05-29-2020, 08:29 AM
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Join Date: May 2011
Location: Roseville
Posts: 386
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I always thought the 9 was wider than the 6. Thanks for taking the time to post this. Very interesting.
David
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RV-9A N435KR, Vans calendar March 2018
LIO 320 B1A, Dual LS Plasma III, AFP injection
G3x touch
Roseville, Ca
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05-29-2020, 10:08 AM
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Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 999
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Great work on the chart!
Interesting when illustrating features & performances of similar evolutionary models:
RV-4 --> RV-8 tandems
RV-6 --> RV-7 --> RV-14 SBS aerobatic
RV-9 <--> RV12 SBS non aerobatic (yes, their mission or evolution not the same but neat performance comparison)
Would be super neat if a similar chart could be produced to compare the top 5 Kit Brands out there in such detail.
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Ralph
built a few RVs, rebuilt a few more, hot rodded some, & maintained/updated a bunch more
Last edited by Ralph Inkster : 05-29-2020 at 10:28 AM.
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