TT45 PRO. Ultimate flight machine

This time we’re actually going to say it… The TT45 is “state-of-the-art” indoor skydiving recirculating wind tunnel by TunnelTech, delivering top-notch airflow quality, lowest noise emissions ever and unseen, unrivalled energy efficiency. Numerous safety features pioneered in TT45 PRO provide unparalleled flying experience to professional flyers and first-timers alike. It is a result of 20+ years dedicated to skydiving, bodyflying, instructing and wind tunnel operations management, from flyers and tunnel owners to flyers and tunnel owners.

Lowest operating expenses among sportflyersfriendly projects. The most advanced wind tunnel on the market. Best value machine.

The most technologically advanced indoor skydiving recirculating wind tunnel on the market, TT45 PRO sets new standards in the industry. Providing 12% more space compared to 14ft tunnels with circular flight chamber, it delivers superb airflow quality, whisper-quiet operation and unseen energy efficiency. Numerous safety features pioneered in TT45 PRO provide unparalleled flying experience to first timers, professional flyers and specialized military training alike.

Designed to accommodate world-class indoor skydiving events, TT45 PRO is suitable for a wide range of disciplines, including dynamic ones: 4-way dynamic, 6-way formation skydiving and up to 24-way VFS head down formations. With a maximum wind speed of up to 320 km/h (optional) and a flight chamber diameter of 4.5 meters, it provides ample space and wind power for the most demanding athletes and teams.

Its cutting-edge technology and design ensure that athletes can perform at their best, while spectators enjoy a thrilling and safe experience. The frameless 8-meter-tall glass chamber with a fully round cylindrical bottom level and an expanding conical second level provides enhanced visibility and flight monitoring. Opting for chemically strengthened glass helps avoid shattering even in case of collision with metal objects.

With a special focus on safety, TT45 features 2.1 flight chamber diffusion ratio, well-balanced safety nets with additional near-the-wall deflection, and a curved entrance to the flight chamber to avoid injuries, thus securing an enjoyable experience for novice and experienced flyers.

TT45 PRO is the most silent machine with astonishing 51dB(A) 1m in front of the flight chamber glass at belly speeds. Such minimal noise emissions allow to integrate TT45 PRO in close proximity or even within residential buildings, mixed use and retail developments.

As energy consumption is a crucial factor in indoor skydiving projects, TT45 PRO boasts exceptional 255-300kW for the belly speed, ensuring lowest power consumption across 14ft class and minimal operating costs among sport flyers-friendly projects. High level of energy efficiency is granted by the overall design, which includes 4 extra-large axial fans with carbon fiber blades situated in the vertical airducts. This wind tunnel is ideal for countries with high energy costs and for environmentally conscious operators.

To ensure a comfortable environment for flyers, regardless of the weather outside, TT45 PRO is equipped with an outright ventilation system and an optional active cooling system. For mild and cold climate locations, outright ventilation allows to additionally increase energy savings up to 35%. For hot climate zones turbulence-free cooling is provided through the hollow turning vanes.

Investing in a TT45 PRO wind tunnel ensures a future-proof, world-class indoor skydiving experience for both entertainment and professional flyers. Its advanced safety features, exceptional performance, and outstanding energy efficiency make it the ultimate choice for any project, from shopping malls to dedicated skydiving centres.


General parameters

Flight сhamber inner diameter4.5m (14’9”)
Glass height default8 m (26’2″)
Glass height maximum16 m (52’5″)

Dimensions Double Loop

Height 30.6 m (100’4″)
Length 33.8 m (110’9″)
Width 10 m (32’8″)

Dimensions Single Loop

Height 39.4 m (129’2″)
Length 25.9 m (85′)
Width 10.5 m (34’4″)

Power Requirements

Power capacity (min) 1260 kW
Average time-weighted power consumption 384 kW
Power consumption @ 180 km/h 278 kW
Standard power capacity 1260 kW
Advanced power capacity 1400 kW
Beast power capacity 1600 kW


Noise level 51 dBA
Darcy-Weissbach drag coefficient, Xi 0.183
Max. Speed @ Standard power capacity 298 km/h
Max. Speed @ Advanced power capacity 305 km/h
Max. Speed @ Beast power capacity 320 km/h

Flight Chamber

Diameter 4.5 m (14’8″)
Height (minimum) 18 m (59′)
Area 15.9 sq.m.
Default glass height 8 m (26’8″)
Glass type chemically strengthened, non-shattering
Glass total thickness ≥50 mm
Low iron glass yes
Optional maximum glass height up to 16 m (52’5″)
BASE jumping chamber height 18 m (59′)
Patented safety net maintains long stroke in close proximity to the walls
Safety net tensioner 2 per cable
Speed drop (Diffusion rate) 2.12
Portal entrance shape curved, collision safe
Portal entrance material impact-dampening rubber
Entrance area speed drop ≤1%

Decompression chamber

Airlock doors automated
Airlock emergency exit yes
Smooth decompression yes
Transit time of customer groups to/from the flight chamber <1 min

Axial fans

Supplier Tunneltech , Germany
Quantity 4
Power (per fan) @ Standard power capaccity 315 kW
Power (per fan) @ Advanced power capacity 350 kW
Power (per fan) @ Beast power capacity 400 kW
Location return vertical airduct
Axel orientation vertical
Diameter 3.37 m (11′)
Effective crossectional area 7.68 sq.m.
Blades material carbon fibre
Blades count 8
Automated lubrication yes


Material of FC Airjet (FC Contraction) FRP
Material of FC Diffuser FRP or glass (optional)
Material of return vertical airducts FRP

Climate control

Ventilation (a.k.a. Passive Cooling) yes
Max ventilation to airflow ratio 30%
Active Cooling System yes (optional)
Additional drag, caused by active cooling system 0 Pa (No drag)
Active Cooling type through turning vanes
Recommended Chiller Cooling Capacity 900 kW (3,000,000 BTU/h)


Color LED backlight strips between glass panels yes, flicker-free (optional)
LED Strips power per m 10 W
LED Strips frame rate 60 fps
LED Projectors yes, flicker-free (optional)
LED projectors default number installed (optional) 8 – 32 (optional)
LED projectors max. power 100 W
LED projectors max. luminous flux power R:1950 G:2700 B:750 lumen
LED projector dimming capability 0 – 100%
LED control from Main Panel yes
LED anti-flicker function high frequency PWM
LED projector PWM frequency 1 kHz
LED color depth 24 bit, 16,777,216 colors
LED projector color depth 36 bit, 64 bln colors


Main panel control display 28″
Touch screen main panel yes
Flight chamber info display 31.5″
Operator desk speed controller autonomous knob
Waiting zone speed controller autonomous knob
Base chamber speed controller autonomous knob
Speed controller knob resolution 0,1%

Turning vanes

Chord 500 mm
Chord-to-Spacing ratio ≥3:1
Material aluminium
Surface treatment anodized
Cooling channels 6
Turning vane heat transfer ratio, per meter @ 10-35m/s airflow speed >105 (±15) W/(m*K)


Get Started