I agree they certainly do look pretty, but as Tom K just observed, they can get heavy and can do damage to the fuse in a hard dork.
Too, unless the fin is large enough to house a practical linkage to move the elevator and one that will return to a well-defined neutral from either direction of deflection, too much attention is needed in the pitch axis.
The Genie and LT/S fin and rudder are much thinner that what is seen on most moldies and ARF's, tapering from 5/16" at the bottom to 1/8" at the top.
The fin is glassed over 4-6 pound AAA contest balsa and the rudder and stab halves involve several grades of balsa to achieve lightness, but strength where needed. They are extremely easy to make and involve no pinning. The covered rudder and stab pair weigh 1.5 oz. total.
The internal stab moving linkage is also very light and as simple as it can get. It also is totally free in its movement with no tube or wire in a tube, etc.
The upshot of the lightness and the position of the stabs on the fin helps to minimize the stress to the small cross section of the fuse in front of the fin in hard landings.
Full details on the construction of the fuse, fin, bellcrank assembly and the tail pieces can be found in File 1 and 2 of the Genie pages at http://genie.rchomepage.com/. ----- Original Message ----- From: "Bill Swingle" <[EMAIL PROTECTED]>
To: "Thomas Koszuta" <[EMAIL PROTECTED]>; "RCSE" <[email protected]>
Sent: Friday, January 21, 2005 1:18 PM
Subject: Re: [RCSE] Pondering T-tails
>>More Efficient
Pardon? I've not heard anything indicating this. What could this be attributed to?
Maybe: 1. Gets tail out of the down wash of the wing. 2. Helps the interference drag at the point of union of the fin and stab.
These are the only possiblities I can think of but they're pretty minimal. I'd not hang my hat on either.
Any more possibilities?
Bill Swingle Janesville, CA
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