💨 BS 7346 / PIANC (Longitudinal Jet Fan Thrust Newtons, Wall Effect Correction Factor)

Tunnel Jet Fan Thrust Calculator

Calculate effective aerodynamic thrust (Newtons) generated by ceiling-mounted reversible tunnel jet fans accounting for boundary wall friction attenuation (derating raw thrust by 10% to 15% when mounted close to the tunnel arch), high-temperature air expansion, and longitudinal tunnel ventilation contracting margins.

1. Project & Operating Inputs

Tunnel Jet Fans Installed (Fan Count e.g. 24 Heavy Tunnel Jet Fans)

Nominal Static Thrust per Fan (Newtons e.g. 850 N Heavy-Duty Fan)

Customer Bid Price for Supplied & Anchored Jet Fan Units ($ / Unit)

FläktGroup High-Temp Jet Fan, Stainless Silencer Casing, Riggers & Tech ($)

2. Financial Breakdown & Yield

TUNNEL JET FAN THRUST METRICS

Turnkey Jet Fan Installation Profit

Tunnel Mechanical Equipment Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost