ARRANGEMENT OF THE EMPENNAGE - PowerPoint PPT Presentation

Arrangement of the empennage l.jpg
Download
1 / 15

  • 460 Views
  • Updated On :
  • Presentation posted in: Pets / Animals

ARRANGEMENT OF THE EMPENNAGE. Requirements: A. Slipstream / Jetstream Effects A1. The empennage must never be in the jet efflux of the engines (must be outside cone w. 6 deg. semi-apex angle). Solutions: A1.1 Divert the centerline of the jet. A1.2 Horizontal stabilizer dihedral.

Related searches for ARRANGEMENT OF THE EMPENNAGE

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Download Presentation

ARRANGEMENT OF THE EMPENNAGE

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Arrangement of the empennage l.jpg

ARRANGEMENT OF THE EMPENNAGE

Requirements:

A. Slipstream / Jetstream Effects

A1. The empennage must never be in the jet efflux of the engines (must be outside cone w. 6 deg. semi-apex angle).

Solutions:

A1.1 Divert the centerline of the jet.

A1.2 Horizontal stabilizer dihedral.

A2. The empennage must not be close to a jet efflux because the jet pumping effect will affect the direction of the airflow and diminish the stabilizing effect of the tail.

A3. The empennage must be as far away as possible from sources of noise to avoid acoustic fatigue.


Arrangement of the empennage2 l.jpg

ARRANGEMENT OF THE EMPENNAGE

Requirements:

B. Stability & Control

A1. The fin and the rudder must provide the counteracting YM in case of engine failure.

A2. The empennage must allow for a safe recovery from stall and spin (especially avoid deep stall).


Arrangement of the empennage3 l.jpg

ARRANGEMENT OF THE EMPENNAGE

1. Fuselage or Fin-Mounted Stabilizer

Pros

  • Structural simplicity & stiffness.

  • Having one surface at the tip of the other increases the AReff by about 50% (winglets). As a result, the horizontal stabilizer can increase the slope of the fin by about 15%.

    Cons

  • T-tails may suffer from flutter and deep stall problems.


Cessna 550 l.jpg

Cessna 550


Bae 146 l.jpg

BAE-146


Arrangement of the empennage6 l.jpg

ARRANGEMENT OF THE EMPENNAGE

2. Twin Vertical Tail

Pros

  • Increased effectiveness of the horizontal stabilizer (winglets)

  • If the fin turns out to be too large, rudder deflection will cause a RM as a result of the large vertical distance of its ac from the longitudinal axis of the ac. A twin vertical will minimize this effect (F-14,F-15, F-18).

  • If twin tail booms are used, the twin vertical is the only solution available (Cessna Skymaster).

  • Decreases combat vulnerability (A-10).


Fairchild republic t 46a l.jpg

Fairchild Republic T-46A


Slide8 l.jpg

F-14


Slide9 l.jpg

F-15


F 18 hornet l.jpg

F-18 Hornet


Cessna skymaster l.jpg

Cessna Skymaster


A 10 warthog l.jpg

A-10 Warthog


Arrangement of the empennage13 l.jpg

ARRANGEMENT OF THE EMPENNAGE

3. Butterfly Tail

Pros

  • Avoids damage to the tail when landing on overgrown terrain (sailplanes).

  • Keeps tail surfaces clear of the engine efflux.

  • Looks cool (V-tail Bonanza)!

    Cons

  • Moving surfaces serve as both rudders (differential deflection) and elevators (simultaneous deflection); complicated control system design.


Thermik excel vetron sailplane l.jpg

Thermik-Excel Vetron Sailplane


Beechcraft v tail bonanza l.jpg

Beechcraft V-Tail Bonanza


  • Login