Backcountry Pilot • Technical Question About Tails

Technical Question About Tails

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Technical Question About Tails

Hello All,

I'm new here, literally just joined! I am currently working on my "ticket to fly" as well working on a design modification for an experimental build. My question is this, what would be the best tail configuration for a bush plane? As a Florida native who has built and owned virtually every machine possible to "run the 'glades" aka, airboats, full-tracks, half-tracks, buggies, 4x4's etc etc I am always concerned with ground clearance. What I predominantly see on bush planes is a conventional tail meaning vertical rudder and low mounted -inline with fuselage- horizontal stabilizer. I understand the Piper Cub has a great deal of design influence, simply put it works and continues to work. That said, wouldn't a t-tail or v-tail be better in preventing damage to the leading edge of a low hanging wing? In my mind raising anything low hanging is a bonus. Just curious if aerodynamic concerns are dictating BCP tail design or is complacent acceptance of the design the norm? I view a strutless high wing with either a t or v tail to be far more resilient and resistant to damage than current designs or....am I merely over thinking this? Thanks!
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Re: Technical Question About Tails

Welcome. The rudder and elevator in line with the prop blast allows good very slow flight rudder control to keep both nose alignment with direction of movement and elevator control to decelerate, on short final, using elevator to slow down and power to control sink all the way to touchdown slowly and softly on the desired touchdown spot. I mean the exact, to the foot, desired touchdown spot.

There are some designs I have never flown that have the engine up top ( some tractor some pusher). Others may have advise on those.
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Re: Technical Question About Tails

-0-
Last edited by dogpilot on Wed Aug 05, 2020 11:51 pm, edited 1 time in total.
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Re: Technical Question About Tails

Take a look at Stinson 108 series tails... specifically the -1 and -2... they are mounted on top of the upper longeron of the airframe making them fairly high off the ground... only draw back is they are a trim tab setup and not a trim-able stabilizer... and they are all metal surfaces, not fabric covered...

I have a partial ownership in a -2 with an 0-470 conversion with constant speed prop... The airplane is a real performer...

Brian


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Re: Technical Question About Tails

dogpilot wrote:T-tails where a design fad. Since at the time many T-tailed commercial jets where coming out and proving to be quite popular and profitable. So GA jumped onto the style wagon and made T-tailed versions of a lot of aircraft, King Airs, Saratogas, Lances, Tramahawks...the list goes on. It turns out most of those aircraft didn't need T-tails in the first place, it was just styling. It ended up decreasing performance and increasing weight, in the tail. To make the tail strong enough to accept all that was demanded of it by placing the horizontal on top of it, a lot of structure was required. Structure that already existed in the rear fuselage. Adding weight that far back made for less load in the load areas. Performance suffered as well, King Air 200's are generally slower than King Air 100's and have that famous King Air tail walk more pronounced. So much so that the B200 added strakes, which where initially added to regular 200's to reduce the wag in STC's introduced by Raisebeck. The trend continued on with the Beech 1900, which has more accessory wings, strakes and tailets than any other aircraft since the 20's just to make it go straight and level!

So short answer, while one might potentially see less damage to the underside of your horizontal, the weight/aerodynamic penalty would hardly be worth it. If you want to talk style wins over all points of the performance compass, then lets talk Beechcraft Duke, best aircraft to potentially decorate a pole ever made.


Just to say this is a good post, nice work DogPilot.
We need a "like" function.

If V tails or T tails were a good idea in backcountry aircraft, there would be more around. I can hardly think of one.
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Re: Technical Question About Tails

Battson wrote:...

If V tails or T tails were a good idea in backcountry aircraft, there would be more around. I can hardly think of one.


The Piper Tomahawk is pretty well respected by the bush crowd.
:wink:
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Re: Technical Question About Tails

Hammer wrote:
Battson wrote:...

If V tails or T tails were a good idea in backcountry aircraft, there would be more around. I can hardly think of one.


The Piper Tomahawk is pretty well respected by the bush crowd.
:wink:


Hey, the T-tail has its benefits when landing a Traumahawk off airport....
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