E-FLITE UMX ASK-21 Instruction Manual - Towing

12

EN

Wind

28 ft 

(8.5 m)

Recommended Aircraft

Alignment for Takeoff

Towing

Towing with the Carbon Cub is only recommended 

for advanced pilots. While towing, be sure to fl y in 

a large, open space.  Also be sure that you have 

two pilots, one for the sailplane, and one for the 

towplane.

The E-fl ite

® 

UMX

ASK-21 sailplane is designed to be 

towed by the E-fl ite

Carbon Cub (EFLU1180) from a 

smooth runway. A tow line (approximately 28 feet 

(8.5 m) long) is included with the UMX ASK-21 or is 

available separately (EFLU1257).

Do not attempt to fl y or operate your ASK-21 any 

longer than 25 minutes on a battery. 

1.  Position both aircraft near each other on the 

runway, facing into the wind.

2.  Tie the tow line to the tow plate on the 

Carbon Cub. Tie the other end of the tow line 

to the release mechanism under the nose 

of the E-fl ite UMX ASK-21 (see tow release 

installation section). 

3.  Space the aircraft apart so there is no slack in 

the tow line. If there is slack, it can result in 

damage to one or both of the aircraft.

4.  Ensure that the tow line is resting above the 

Carbon Cub’s horizontal tail so the Carbon 

Cub can pull the sailplane into the air safely.

5.   Quickly apply power to the Carbon Cub once 

both pilots are ready for takeoff. 

6.   Keep the Carbon Cub on the ground until the 

sailplane and is 2–3 ft (0.9–1.2 m) above the 

Carbon Cub. 

7.   Slowly apply elevator to lift the Carbon Cub off 

of the ground. Be sure to keep the Carbon Cub 

under the sailplane until you have reached your 

release altitude.