A long-range Schmidt-Cassegrain laser-velocimeter for large wind tunnel applications

1995 ◽  
Author(s):  
Stephen Dunagan
Keyword(s):  
Wind Tunnel ◽  
Long Range ◽  
Large Wind

Long-range Schmidt-Cassegrain laser velocimeter for large wind-tunnel applications

AIAA Journal ◽  
1996 ◽  
Vol 34 (3) ◽  
pp. 515-520
Author(s):  
Stephen E. Dunagan
Keyword(s):  
Wind Tunnel ◽  
Long Range ◽  
Large Wind

China's Large Wind Tunnel

1939 ◽  
Vol 11 (9) ◽  
pp. 315-350
Author(s):  
F.L. Wattendorf
Keyword(s):  
Wind Tunnel ◽  
Large Wind

An overview of experiments on the dynamic sensitivity of MAVs to turbulence

2010 ◽  
Vol 114 (1158) ◽  
pp. 485-492 ◽  
Author(s):  
A. Watkins ◽  
M. Thompson ◽  
M. Shortis ◽  
R. Segal ◽  
M. Abdulrahim ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Micro Air Vehicles ◽  
Rating System ◽  
Flight Tests ◽  
Wind Environment ◽  
Turbulent Wind ◽  
High Turbulence ◽  
Per Se ◽  
Rotary Wing ◽  
Large Wind

Abstract Aspects of the turbulent wind environment Micro Air Vehicles (MAVs) experience when flying outdoors were replicated in a large wind tunnel. An overview of the facility, instrumentation and initial flight tests is given. Piloting inputs and aircraft accelerations were recorded on fixed and rotary wing MAVs and for some tests, measurements of the approach flow (u,v,w sampled at 1,250Hz at four laterally disposed upstream locations) were made. The piloting aim was to hold straight and level flight in the 12m wide × 4m high × ~50m long test section, while flying in a range of turbulent conditions. The Cooper-Harper rating system showed that a rotary craft was less sensitive to the effects of turbulence compared to the fixed wing craft and that while the fixed wing aircraft was relatively easy to fly in smooth air, it became extremely difficult to fly under high turbulence conditions. The rotary craft, while more difficult to fly per. se., did not become significantly harder to fly in relatively high turbulence levels. However the rotary craft had a higher mass and MOI than the fixed wing craft and further work is planned to understand the effects of these differences.

Vespula vulgaris(Hymenoptera: Vespidae) gynes use a sex pheromone to attract males

2013 ◽  
Vol 145 (4) ◽  
pp. 389-397 ◽  
Author(s):  
Robert L. Brown ◽  
Ashraf M. El-Sayed ◽  
David Maxwell Suckling ◽  
Lloyd D. Stringer ◽  
Jacqueline R. Beggs
Keyword(s):  
Sex Pheromone ◽  
Wind Tunnel ◽  
Long Range ◽  
Sex Attractant ◽  
Mate Finding ◽  
Sex Attraction ◽  
Vespula Vulgaris ◽  
Baited Traps ◽  
Virgin Queens ◽  
Cotton Roll

AbstractSex attraction studies were carried out to investigate the mate-finding behaviour of invasiveVespula vulgaris(Linnaeus) (Hymenoptera: Vespidae) wasps. Delta traps were baited with live, caged males, and gynes (virgin queens) ofV. vulgaristo determine whether either sex produced a long-range sex attractant. Traps baited with gynes caught 71 males, while the controls and live-male wasp baited traps did not catch gynes. Wind tunnel trials were performed to verify if the signal produced by the gynes was chemical in nature. First,V. vulgarismales were flown to live caged gynes, where more than half of the males tested flew upwind in a zigzagging pattern and made contact with caged gynes. Males were also flown to hexane rinses of gynes and flew upwind in a zigzagging pattern towards the gyne extract, although none made contact with the cotton roll stimulus. The results presented here demonstrate conclusively thatV. vulgarisgynes produce a sex pheromone.

scholarly journals Superconducting electromagnets for large wind tunnel magnetic suspension and balance systems

1985 ◽  
Vol 21 (2) ◽  
pp. 444-447 ◽  
Author(s):  
R. Boom ◽  
Y. Eyssa ◽  
G. McIntosh ◽  
M. Abdelsalam ◽  
R. Scurlock ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Magnetic Suspension ◽  
Large Wind
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