The SPEED MERCHANT AERO RESEARCH & TESTING LOW SPEED WIND TUNNEL (SMART LSWT) is located at 207 Main St (Rt121A), Unit #2 in Plaistow, NH 03865, right on the Southern NH/Northeastern MA Border just off Rt125 and I-495.
Just take Exit 51B off I-495 coming from North or South, merge onto Rt125 North, staying right to stay on Rt125 at the intersection w/ Rt121. About 2 miles up, take a left at the intersection w/ Rt121A (Main St). The Speed Merchant Aero Wind Tunnel facility is in Unit #2 in the commercial building on the right at the corner of Main St and Walton Rd adjacent to "All Tune and Lube".
If coming from the East or West, take Rt111 to Rt121A South to the facility on your left at 207 Main St (Rt 121A), corner of Walton Rd. If you hit Rt125, you have gone too far. Or... just use your GPS, they all have the right location.
Click here for Google Map to SMART
Enjoy The Ride!