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ulflyer(at)verizon.net
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 Posted: Mon Feb 27, 2006 10:28 am Post subject: Fwd: Re: New Owner - 5 rib vs 7 rib |
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Went back and found this message and comments made by Dennis. This
might add some light to the rib topic.
jerb
[quote]From: "Dennis Souder" <flykolb(at)epix.net>
To: <kolb-list(at)matronics.com>
Subject: Re: New Owner
Date: Tue, 16 Apr 2002 21:57:23 -0400
Sender: owner-kolb-list-server(at)matronics.com
Reply-To: kolb-list(at)matronics.com
X-Airmail-Delivered: Tue, 16 Apr 2002 20:53:46 -0500 (CDT)
X-Airmail-Spooled: Tue, 16 Apr 2002 20:53:34 -0500 (CDT)
Ken and Kolbers,
Sorry, but I beg to differ; some things can be stretched - but one can
stretch too far.
Original FS: 5 ribs approx 550 lb. GW ( I forget the exact figure) Ralph
says 535 ... sounds about rights.
FireFly: 5 ribs 500 lb. GW (lighter spar attach fittings)
TwinStar: 7 ribs 725 lbs. GW
TwinStar Mark-II: 7 ribs 750 lb. GW (longer H-section)
FireStar-II: 7 ribs 750 lb. GW
Mark-III: 9 ribs 1000 lb GW.
As you can see there is a very strong correlation between # of ribs and GW
and there is a very good reason for this: higher GW requires more ribs. A
"bit over 700 lbs" .... seems like 7 ribs would be required.
Dennis
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Ralph Hoover
Joined: 09 Jan 2006
Posts: 206
Location: Central Ohio
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| Posted: Mon Feb 27, 2006 2:43 pm Post subject: Re: Fwd: Re: New Owner - 5 rib vs 7 rib |
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I just replied to the five rib verses seven rib thread a few minuites ago and discovered that I failed to state that my 503 powered, 7 rib'ed firstar is a single passenger plane. I didn't realize however that it added that much additional weight. I have to locate two more mechanical scales so tha I can weigh and find C.G. anyway. This gives me that much more reason.
Ralph of Ohio
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