Sunday, May 29, 2011

Top engine mount points



Invert the fuselage and support on the canopy sill edges.
Remove peel ply as required and sand thoroughly.

Cutting list for both top mounts (share between left and right)
410gsm (140mm wide) 1300mm long (roll width) 20 pieces
500gsm UD (125mm wide) 1000mm long 20 pieces 
500gsm UD (125mm wide) 1200mm long 10 pieces

Start with a piece of 410 going 100mm up onto the firewall and as far back as its 1300mm length extends. There is a kink near the front edge of the canopy which the 410 can go around.
Next is a piece of UD (1000mm long) going 100mm up the firewall and straight back onto the fuselage side as shown in the pics. UD cannot be kinked.
Third is a piece of 500gsm (1200mm long) overlapping the other UD and extending back to about 150mm past the aft edge of the canopy sill as per the pic.
Avoid letting the layers climb onto the underside of the canopy sill as this will clash with the longeron moulding to be attached there later.

Continue in this order. Finish with peel ply. Work slowly ensuring that all bubbles are removed - this is a critical part of the structure!!. Also ensure that the glass onto the firewall is centred over the pilot hole. Making a dark circle with a felt tipped pen around the hole helps.

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