New sporting baby planes undergo first tests at Heston . The Hillson Prags , a new light sporting two seater designed to meet the requirements of wide sporting circles regarding low selling prices and servce expenses , underwent its first tests at Heston Aerodrome . the machine , a light hig wing monoplane , and side by side cabin seating for two people . The wing , which is fixed on the fueslage by four bolts entirely covers the cockpit , but can be detached by a crew of two within five minutes , rendering complicated wing folding unnecessary . The new baby plane powered by a Praga ' B ' 40 horsepower engine , having a top speed of nearly 100 miles an hour and service ceiling of 10 , 800 feet , is among the most economical machines in existence . It is sold at ?385 . Photo shows the pilot lifting a section of the wing . 8 January 1936