1. Cryohawk
artist’s concept
This is a photo illustration. No Cryohawk yet exists.
Half-scale Demonstrator of a CReSIS Polar Exploration UAV Concept
Richard Colgren – KUAE
Meeting 97, Aerospace Control and Guidance Systems Committee

2. Roadmap Background ½ Scale Demonstrator Intro to CReSIS
KU UAV Background
Sensor Payload
Requirements
Mission Profile
Updated Design
½ Scale Demonstrator
AE 721 Student Team
AE 510 Student Team
PSU Team and Others
Goals
Current Design
Challenges

3. For more info, go to cresis.ku.edu
Intro to CReSIS
Science-driven technology development
Focused on mapping ice-sheet characteristics
Antarctica and Greenland missions in years 3 through 5
Established by NSF
For more info, go to cresis.ku.edu

4. UAV Lab Objectives: Unmanned Aerial Vehicles Rotorcraft Fixed Wing
Develop, test and demonstrate single and multiple Intelligent UAV concepts and systems for use in defense, scientific and commercial applications.
Unmanned Aerial Vehicles
Rotorcraft
Fixed Wing
Kansas NASA EPSCoR Program
Kansas NSF EPSCoR Program
Autonomous Rotorcraft Project
Phase I Raptor 50 Flight Test Familiarization
Phase II RMAX Flight Test Data Collection
Phase III RMAX Autonomous Flight
Hardware Validation
Phase IV RMAX Software Validated
Phase V Cooperative Flight Demonstrated
Raptor 50 Leader/Follower, R-Max
- Edge 540 T High Alpha CFD/Test Program
- Hawkeye UAV Program/SAE Competition
J-3 Cub Instrumentation Project
Ultra Stick R/C Airplane Obstacle Avoidance
- Visual Based-Obstacle Avoidance Project
- NSF CReSIS Center
Phase I Preliminary Design Developed
Phase II GNC System Designed
Phase III - Flight Demonstrations

5. KU Fixed Wing UAVs SAE Heavy-Lift Edge 540 T Polar UAV Ultra Stick
Hawkeye
Ultra Stick
1/3 Scale J-3 Cub
SAE Heavy-Lift
Edge 540 T

6. KU Rotary Wing UAVs
Yamaha RMAX and Raptor 50 Helicopters

7. KU Hypersonic Vehicle Studies
Generic Hypersonic Vehicle
Navy Hypersonic Vehicle Study
Supersonic Flows with Injected Streams - NASA

8. AST-4000 Flight Simulator Specifications
Aviation Simulation Technology Inc.
14802 W. 114th Terrace
Lenexa, KS USA
AST-4000 Flight Simulator Specifications

9. KU Hypersonic Vehicle Simulation
Clb Versus a & Mach Number
Look-up table
Original Graph
MATLAB Routine (FITTER)
% This routine is written in order to find the best fitting equation for
newA(:,3) = [0] ;
newA(:,1:2) = A(:,1:2) ;
[m,n]=size(A);
if(n<4) % For the basic vehicle evaluation, no control surface.
newA(:,4) = A(:,3) ;
alpha = A(:,1) ;
end
A = newA ;
mach = A(:,2) ;
cof = size(27,10) ;
t = size(mach) ;
val = A(:,4) ;
cs = A(:,3) ;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%---1st---%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
X = [ones(size(val)) (alpha) (mach) (cs) ] ; % The first prediction for the aerodynamic equation
j = ;
con = X\val ;
Cof(1:size(con),j) = con(:) ;
perf(j) = sse(Err,X) ;
Err = newval- val ;
newval = X*con ;
% The sum of squares due to error.
% pause
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%---2nd---%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% A value closer to 0 indicates a better fit.
% This statistic measures the deviation of the responses from the fitted values of the responses.
con = X\val ;
X = [ones(size(val)) (alpha) (mach) (cs) (alpha).^2 (mach).^2 (cs).^2 ] ; % The 2nd prediction for the aerodynamic equation
j = j ;
newval = X*con ;
Cof(1:size(con),j) = con(:) ;
Analytical Expression
MATLAB Simulation
FORTRAN Simulation

10. UAV Sensor Payload Depth-sounding radar Surface-scanning lidar
Other sensors
artist’s concept
Ice Sheet
Bedrock

11. UAV Sensor Payload Depth-sounding radar Surface-scanning lidar
Other sensors
Ice Sheet
Radar
Bedrock

12. UAV Sensor Payload Depth-sounding radar Surface-scanning lidar
Other sensors
Lidar
Ice Sheet
Radar
Bedrock

13. UAV Requirements 175 lb payload Radar antenna array (14 ft by 2.5 ft)
6,000 km (3,200 nm) round trip
1 km (3,300 ft) AGL for survey
126 knots for survey (155 knots cruise)
Jet or Diesel fuel preferred

14. Mission Profile (Greenland)
Taxi / takeoff / climb
Cruise 200 nm to glacier
Conduct survey
Local survey or
Regional survey
Return cruise to base
Land / taxi

15. Mission 1 Profile (Antarctica)
Taxi / takeoff / climb
Cruise 1,350 nm
Conduct survey
Local survey or
Regional survey
Return cruise
Land / taxi
Specific missions trade range with survey area covered. Longer range missions require more sorties.

16. Redesign – Full Scale Concept
Low wing
Larger center wing
More details
Antennas, etc.
artist’s concept

17. Full Scale Sizing
Design Point

18. Revised Design Take-off gross weight 2,806 lbs Empty weight 1,552 lbs
Fuel weight 1,064 lbs
Since preliminary design review, these estimates are changing.

19. Regression Study of 18 UAVs
Design

20. Engine Power Estimation
Wing loading = 22 lb/ft2
Power loading = 19 lb/hp
Total Power Required = 2806/19  150 hp
Power Required per engine = 75 hp
½ Scale to use two 3W-75 engines
Since preliminary design review, these estimates are changing.

21. Graduate Design-Build-Fly Team
Four students:
David Borys
Satish Chilakala
Edmond Leong
Nelson Brown
Advisors:
Dr. Richard Colgren
Jewon Lee (TA)

22. Collaboration Undergrad manufacturing class (AE510)
Center wing
Pittsburg State University
Water-jet cutting
Templates
Kansas State University
Autopilot
You?

23. Goals Stability and control demonstrator for CReSIS
Experience for KUAE
Manufacturing larger aircraft
Operating sizable UAVs
Asset for ongoing
UAV research

24. Schedule October 11th PDR and Scaled Design
October 25th Begin Engine Testing
November 3rd CDR (Full Size and Scaled)
November 21st Start Construction
December 1st Final Presentation
December 5th Initial Flight Test Plan
December 15th Final Report Submission
January 20th All Scaled UAV Parts
May 15th First Flight

25. Current Scaled Design 90 lb (empty) 18 ft span, 9 ft long
Main spar 1.75” dia., 1/8” thick, 6061-T6 aluminum tube
Wings
Fiberglass skin
Balsa & Foam ribs
Fuselage
Wooden structure

26. Building the Cryohawk

27. Participation

28. Budget

29. Challenges Time Money Partnerships with: Seeking support from:
Undergraduate class
PSU
KSU
Embry-Riddle
Others?
Money
Seeking support from:
University of Kansas ($2,000)
CReSIS ($8,000)

30. Questions / Discussion
artist’s concept
artist’s concept