Okay, maybe I'm not too bright... I need to understand how you get reduced load on the wafs with fuel in the outer wing. Assuming 6 pounds per gallon, how does (for example) a 10 gallon wing tank reduce stress on the waf if (lift issues aside) you maneuver in any direction, considering inertia and mass, that the 60 pounds in each outer wing doesn't affect the load on the wafs?
If the fuel is in the wing stubs and/or a header tank, I could see how the 'load' on the wafs might be neutral (all things considered), but with moment arm considerations, wouldn't hanging that 60 pounds or so out at the outer wing increase the flex load at the waf? Just asking for a friend. The CG issue would (I would think) depend on placement of the tanks - wing or tip - relative to the "normal" CG calculations for the airframe. Blue skies, calm winds. Mark W N952MW (res) still workin on it. -----Original Message----- From: KRnet [mailto:[email protected]] On Behalf Of Mike Stirewalt via KRnet Sent: Monday, December 14, 2020 5:34 PM To: [email protected] Cc: [email protected] Subject: KR> Wing tanks Larry said, > "Fuel in the outer wings also reduce the weight carried by the W.A.F.'s." That is so true. Tip tanks, or outer wing tanks, carry with them great advantages. Not only do they carry weight without affecting CG to any significant extent, but unloads stress at the wing root, making for a more resiliant structure. A third virtue, at least with tip tanks, is their reduction of tip vortice drag, acting as winglets. Mike KSEE ____________________________________________________________ Sponsored by https://www.newser.com/?utm_source=part&utm_medium=uol&utm_campaign=rss_tagl ines_more Trump Says Barr Has Resigned http://thirdpartyoffers.juno.com/TGL3141/5fd7f6ddb5cea76dd2087st02vuc1 Biden Wins Electoral Vote, With No Defections http://thirdpartyoffers.juno.com/TGL3141/5fd7f6ddd997176dd2087st02vuc2 New COVID Variant Is 'Something to Keep an Eye On' http://thirdpartyoffers.juno.com/TGL3141/5fd7f6de92f976dd2087st02vuc3 _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/[email protected]/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to [email protected] _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/[email protected]/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to [email protected]
