X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-mealy.atl.sa.earthlink.net ([209.86.89.69] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6574453 for lml@lancaironline.net; Sat, 02 Nov 2013 19:08:03 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.69; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=WyNJer0oYrsQvafuub+/M61TuhnEEj+Tw8lkviAEQbP+3dlnxwzDaEsfaZAKQrwF; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [70.16.215.180] (helo=[192.168.1.24]) by elasmtp-mealy.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1VckHu-0002c5-SF for lml@lancaironline.net; Sat, 02 Nov 2013 19:07:27 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-43--747963083 Subject: Re: [LML] Tip tanks Date: Sat, 2 Nov 2013 19:07:26 -0400 In-Reply-To: To: "Lancair Mailing List" References: Message-Id: <137D8CC2-1A78-4B4C-B69C-3B0A7478513B@earthlink.net> X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940bb511c35361a3c0a32c4d8122d6d4494350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 70.16.215.180 --Apple-Mail-43--747963083 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Jim, I have absolutely no expertise in aircraft design. However, I = will comment that the tail and rudder on the IV-P are pretty wimpy (in = terms of authority) in the first place. Putting all that mass and drag = out on the end of the long lever arm of the wing will certainly not = improve that situation. Retrospection on my project is that a) seemingly little changes have a = lot of unanticipated ripple b) the value of the change often doesn't = stack up to the value of having the airplane flying. =20 If it were me I would max the wetted area in the wing, buy the biggest = belly tank I could find (proven) and get it flying. Colyn On Nov 1, 2013, at 7:24 AM, JIM HANKINS wrote: Does anyone know of a valid reason for not installing 15 gal tip tanks = on a Lancair IVP turboprop? I made provisions for this when I was building, but to my knowledge it has not been widely = done. Adjustment of the angle of attack on the tanks would be welcome. =20 Most comments on this would be appreciated. =20 Jim Hankins --Apple-Mail-43--747963083 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Jim, = I have absolutely no expertise in aircraft design. However, = I will comment that the tail and rudder on the IV-P are pretty wimpy (in = terms of authority) in the first place. Putting all that mass and = drag out on the end of the long lever arm of the wing will certainly not = improve that situation.

Retrospection on my project = is that a) seemingly little changes have a lot of unanticipated ripple = b) the value of the change often doesn't stack up to the value of having = the airplane flying.

If it were = me I would max the wetted area in the wing, buy the biggest belly tank I = could find (proven) and get it = flying.

Colyn

On Nov 1, = 2013, at 7:24 AM, JIM HANKINS wrote:

Does anyone know of a valid reason for not = installing 15 gal tip tanks on a Lancair IVP turboprop? I made = provisions for

this when I was building, but to my knowledge = it has not been widely done. Adjustment of the angle of attack on = the tanks would be welcome.

Most comments on = this would be appreciated.

Jim = Hankins

= --Apple-Mail-43--747963083--