Rand KR-1B

The KR-1B motorglider is essentially a stock KR-1 with longer wings and a bigger tail. For a wing curve, an RAF-48 standard KR-1 airfoil was used for the center section and the GA(W)-2 airfoil for the replacement outer panels. The outer wing section provides a clean and responsive curve for use with a spoiler/flap control, permitting deadstick landings at 70 mph TAS. Where the stock KR-1 wingspan is 172", the motorglider wingspan measures 27' from tip to tip, thereby increasing square footage from 64 to 91.

Power is supplied by a 60-hp VW engine. Maximum cruise is 130 mph, and with 33 gallons of fuel, range is 950 miles while getting 29 mpg. At the standard 4-gph burn rate, 33 gallons should deliver 8.25 hours of flying at 120 mph for a range of 1,020 miles.

Engine: 60-hp VW
Wing span: 27 feet
Wing area: 91 sq.ft
Maximum cruise: 130 mph
Fuel capacity: 33 USgallons
Range: 950 miles
At 120 mph Endurance: 8.25 hours
At 120 mph Range: 1020 miles
Airfoil centre: RAF-48
Airfoil outer: GA(W)-2