E-flite UMX ASK-21 BNF User Manual download pdf (Page 11)

Hi-Start Launch (continued)

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

longer than 25 minutes on a battery.

1. Choose an anchor spot in firm soil and drive

the stake at an approximate 45 degree angle to

your chosen launch path (See image A).

2. Slide the rubber loop through the open section

on the loop end of the stake. Pull on the

assembly to ensure it is securely attached to

the stake, and the stake is secure in

the ground.

3. Unroll the assembly downwind from the stake,

ensuring there are no tangles or knots. Once

your assembly is completely laid out (but not

stretched), slowly walk away from the stake,

stretching the rubber.

4. Walk approximately 25 paces and attach the

string loop to the hi-start hook on the bottom

of your airplane. Keep a firm grasp on your

launch assembly and your aircraft. Ensure your

transmitter and aircraft are powered on and

bound together.

5. Toss the aircraft into the wind at a 30

degree upward angle (See Image B). During

the launch, it may be necessary to use the

transmitter to control the aircraft’s swift

movement. Keep in mind that the included

launch assembly will unwind to approximately

120 feet (36 m) and will stretch an additional

75 to 100 feet (23 to 30 m).

Stretch length for your launch assembly is based on

normal wind conditions of about 5 mph (8 kph).

Increase or decrease how far you stretch your

launch assembly for the wind conditions. The

windier it is, the less you should stretch the launch

system. The calmer it is, the further you can stretch

it. Do not stretch further than 35 paces.

Hi-Start Precautionary Guidelines

• Make sure the stake is securely anchored. Check

throughout the day to make sure the stake is

not loose. Reposition the stake if necessary to

account for changing wind conditions.

• During the launch, make sure there is no one

between you and the anchor stake.

• Do not over-stretch the rubber. Doing so can

overstress the airplane, causing wing failure.

• Periodically check all knots. If the rubber or string

shows wear, replace the assembly.

Maintenance and Storage

Extreme and/or prolonged heat decreases the life of

rubber cord.

Store the assembly in a cool, dry place, loosely

wound on a spool. Avoid leaving the assembly in

an automobile. Preserve the rubber by applying a

light dusting of talcum or baby powder. The powder

decreases ground friction during use and adhesion

during storage.

45Û

Wind

30Û

Wind

Hi-Start

Stake

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E-flite UMX ASK-21 BNF User Manual Page 11

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