Specifications

SONIC OWNERS MANUAL

Version 1.01 21

Bent or Damaged Leading Edge:

Remove the leading edges (start with the one on the side to which the glider seems to

turn) and check them for bends or dings. If you can not find a bend, one of them may

have been stressed and as a result, now displays a slightly different flexing characteristic

to the other. (You will find directions for sail removal and leading edge removal in the

Maintenance section.)

If the leading edge is bent beyond straightening (ie. if grazing of the anodising is evident

then the bar is likely to be beyond salvage.) or, is dinged then it will need replacing either

as a front or back section, or both.

To straighten, place the centre of the bend mid-way between two well padded supports,

with the bend curving up, apply a steady downward force releasing once the bar flexes

just beyond a similar deflexion in the opposite direction to the bend. Carefully inspect

the tube to assess any improvement and repeat, becoming more gentle as the bend is

reduced. Never over-straighten and if the bar seems to return to straight or beyond

without much effort then it has been over-stressed and will need replacing. Always look

for signs of crazing and feel for deformation around the vicinity of the bend.

Sail Tension

The Sonic has only one sail tension setting on the leading edge and creation of a new

tension setting should only be carried out by suitable qualified pilots. (See Dealer

Tuning section.)

Reshaping Battens:

To reshape the battens for wing drop during a turn or bank, adjustment should only be

made to battens #5 and #6. Assuming the battens have no damage (checked before),

increase the camber on batten #6 on the side to which the glider seems to drop in the

turn. To do this, take the other #6 and use it as a guide. Carefully bend the batten a

further 1/2” (approximately) making the increase in camber a smooth continual

adjustment rather than short and sharp. Check against the other batten. The

adjustment should cause the front tip of the batten to extend about 1/2” beyond and

below the original shape. Test fly this adjustment and do the same with the #5 batten if

more adjustment is required.

This alteration will cause the tip to generate more lift at lower speed when on the inside

of a turn. Over cambering will only result in the problem changing to the other wing and

an overall performance reduction.

This repair is very delicate and should only be attempted if the bar is only

slightly bent. It is always a good idea to consult your Moyes dealer before

rushing in.