ASW22DB (ETA BITER) Evolution Feb98 to Jun03
Project Phases <ul><li>Phase I - Build ASW22BL with 30% Less Horizontal Tail Area </li></ul><ul><li>Phase II - Modify HQ17...
Anticipated Performance  Gains From Project Phases <ul><li>9% Performance Gain at Best L/D </li></ul><ul><li>11% Performan...
Phase I - Build ASW22BL With Smaller Horizontal Stabilizer  <ul><li>2.6% Less profile drag relative to wing </li></ul><ul>...
Phase II - Modify HQ 17 Airfoil <ul><li>Prof. Loek Boermans Designs Modification to HQ17 Airfoil Lower Surface for 7.5% Le...
Momentum Rake Installation
Flight Test Verify Theoretical Calculations
Blowing Articulation <ul><ul><ul><li>Blow Holes at 72%  </li></ul></ul></ul><ul><ul><ul><li>Blowing Set as a Function of F...
Delft HQ17M Airfoil Design Was Implemented and Flight Tested
Phase III - New Vertical Stabilizer & Retract Tail Wheel <ul><li>Reasons For Building -Drag reduction with modern profile ...
Vertical Stabilizer Construction
Tail Boom Construction
Stabilizer Alignment
Vertical Stabilizer Construction
Perspective
Phase IV - New Airfoil on Outboard Wing, Span to 28m <ul><li>Reasons for Changes - Improve lift distribution to near ellip...
Skin Removal & Contouring
Skin Replacement & Aileron Construction
New Airfoil & Wing Contouring
Wing Tip Construction
Removable Tip and Perspective
 
Internal Airflow Improvement
 
Ship met All Expectations Winning 03 Open Class Nationals
Remaining Work <ul><li>Build Lighter Weight Ailerons </li></ul><ul><li>Build and Test Delft Winglets per Boermans & Hulst ...
 
Comparisons
Design Team
Upcoming SlideShare
Loading in …5
×

SSA Convention 04, Eta Biter presentation by Dick Butler

1,519 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,519
On SlideShare
0
From Embeds
0
Number of Embeds
4
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

SSA Convention 04, Eta Biter presentation by Dick Butler

  1. 1. ASW22DB (ETA BITER) Evolution Feb98 to Jun03
  2. 2. Project Phases <ul><li>Phase I - Build ASW22BL with 30% Less Horizontal Tail Area </li></ul><ul><li>Phase II - Modify HQ17 Airfoil Inboard Wing </li></ul><ul><li>Phase III - New Vertical Stabilizer and Retractable tail wheel </li></ul><ul><li>Phase IV - New Outboard Airfoil Profile, Span Increase to 28m, Internal Air Flow Improvement </li></ul>
  3. 3. Anticipated Performance Gains From Project Phases <ul><li>9% Performance Gain at Best L/D </li></ul><ul><li>11% Performance Gain at High Speeds, (160km/hr) </li></ul><ul><li>Improved Climb Performance From Reduced Span Loading </li></ul><ul><li>Equal flying qualities with 28m Span by Maintaining Vertical Tail Volume Coeff. (V/S.b) </li></ul>
  4. 4. Phase I - Build ASW22BL With Smaller Horizontal Stabilizer <ul><li>2.6% Less profile drag relative to wing </li></ul><ul><li>Good stability/elevator authority on tow & low speed flight (Minimum pilot wt. 88kg) </li></ul>
  5. 5. Phase II - Modify HQ 17 Airfoil <ul><li>Prof. Loek Boermans Designs Modification to HQ17 Airfoil Lower Surface for 7.5% Less Skin Friction Drag at High Speeds (6.0 percent relative to wing). </li></ul>
  6. 6. Momentum Rake Installation
  7. 7. Flight Test Verify Theoretical Calculations
  8. 8. Blowing Articulation <ul><ul><ul><li>Blow Holes at 72% </li></ul></ul></ul><ul><ul><ul><li>Blowing Set as a Function of Flap Position </li></ul></ul></ul><ul><ul><ul><li>NACA Ducts Opened & Closed by Servos Mounted Over Plenum </li></ul></ul></ul>
  9. 9. Delft HQ17M Airfoil Design Was Implemented and Flight Tested
  10. 10. Phase III - New Vertical Stabilizer & Retract Tail Wheel <ul><li>Reasons For Building -Drag reduction with modern profile -Maintain 22BL tail volume coefficient(V/S.b) with 28m span (add 30cm tail boom, 10cm span) -Center hinged rudder -Drag reduction with retract tail wheel </li></ul><ul><li>Benefits - 25% Less profile drag - 2.2% Less drag relative to wing - Better handling from new profile and center hinged rudder </li></ul>
  11. 11. Vertical Stabilizer Construction
  12. 12. Tail Boom Construction
  13. 13. Stabilizer Alignment
  14. 14. Vertical Stabilizer Construction
  15. 15. Perspective
  16. 16. Phase IV - New Airfoil on Outboard Wing, Span to 28m <ul><li>Reasons for Changes - Improve lift distribution to near elliptical - Less profile drag with Delft DU99-138 - Improve low speed, 1.8m more span - Strengthen wing for 850kg max weight </li></ul><ul><li>L. Boermans & M. Hulst designed new airfoil and winglet for outer wing panel </li></ul><ul><li>2% Less profile drag at high speeds & 4% at low speeds relative to wing. </li></ul>
  17. 17. Skin Removal & Contouring
  18. 18. Skin Replacement & Aileron Construction
  19. 19. New Airfoil & Wing Contouring
  20. 20. Wing Tip Construction
  21. 21. Removable Tip and Perspective
  22. 23. Internal Airflow Improvement
  23. 25. Ship met All Expectations Winning 03 Open Class Nationals
  24. 26. Remaining Work <ul><li>Build Lighter Weight Ailerons </li></ul><ul><li>Build and Test Delft Winglets per Boermans & Hulst Design </li></ul><ul><li>Obtain Performance Polar for Completed ASW22DB </li></ul>
  25. 28. Comparisons
  26. 29. Design Team

×