TT25 µFly


The smallest wind tunnel model in Tunnel Tech lineup, TT25 μFLY is an entry-level machine, tailor-made to meet the needs of entertainment-oriented projects. Overseeing the financial side was one of the priorities, while creating TT25 μFLY. The result is a remarkably affordable yet outstanding indoor skydiving solution that doesn’t compromise on quality. A perfect combination of high performance, compact footprint and low energy consumption.

Designed with first-timers as the main target group, TT25 μFLY features a cozy 2.5-meter diameter flight chamber. 5 meters of completely transparent chemically strengthened glass provide a safe environment inspiring to try body flying. The conical shape of the flight chamber optimizes safety and stability, allowing novice flyers to enjoy the experience with confidence.

Despite its size, TT25 μFLY is powerful enough for intermediate freefly training and head-up flying. As a result, it’s appealing for skydivers eager to hone their basic skills. This customer group can generate additional revenue in off-peak hours and increase the occupancy of the tunnel.

Featuring an extra-large low RMP axial fan with carbon fiber blades located in the vertical airduct, TT25 μFLY ensures high energy efficiency and low noise emissions. The built-in active cooling system provides turbulence free cooling through hollow turning vanes making the flying experience comfortable at any outside temperatures.

With the well-thought-out design installation and disassembly are straightforward. TT25 μFLY is your flexible, hassle-free solution for both permanent and temporary locations. TT25 μFLY arrives as a complete package, including a load-bearing structure and a chiller. It’s a plug-and-play solution, streamlining the setup process for your convenience.

TT25 μFLY allows to start generating returns swiftly. Our solution is crafted to minimize downtime and maximize profitability, ensuring that your investment pays off in record time. TT25 μFLY opens new opportunities for small-scale projects and economically challenging environments. Suitable for shopping malls, entertainment centers and amusement parks.


General Parameters

Flight сhamber inner diameter 2.5 (8′ 2″)

Dimensions Single Loop

Height 16.5 m (54′)
Length 10.7 m (35′)
Width 4.7 m (15’4″)

Power requirements

Power capacity (min) 450 kW
Average time-weighted power consumption 199 kW
Power consumption @ 180 km/h 146 kW
Standard power capacity 450 kW
Advanced power capacity n/a
Beast power capacity n/a


Noise level 65 dBA
Darcy-Weissbach drag coefficient, Xi 0.31
Max. Speed @ Standard power capacity 250 km/h

Flight chamber

Diameter 2.5 (8′ 2″)
Height (minimum) 5 m (16’4″)
Glass type chemically strengthened, non-shattering
Glass total thickness ≥50 mm
Low iron glass yes
Optional maximum glass height
BASE jumping chamber height
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 1
Power (per fan) @ Standard power capaccity 450 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
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 450 kW (1,535,464.1 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 90 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 yes
Waiting Zone Speed Controller yes
Base Chamber Speed Controller n/a
Speed Controller Knob Resolution 0,1%/click

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)


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