Greame,
Unfortunately, you are correct. That duct is only for the 914 intake air. It
should probably be closed up. A couple of layers of BID laid up on the inside
with at least 1 inch of overlap onto the cowl should do. Then fill the outer
and sand to smooth and match the cowl. Prime and paint. You should be OK.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
On Jan 15, 2012, at 11:37 AM, graeme bird wrote:
>
> Had a sudden panic that I had unnecessarily opened up the lower cowl starboard
NACA duct and that it was only required for 914 inlet and not my 912. I cant
see what its for for the 912ULS as it would only cool the oil tank (which is
already too cool in flight) and possibly one end of the exhaust.
> Is it necessary, has anyone filled it in?
>
> --------
> Graeme Bird
> G-UMPY
> Mono Classic/XS FWFD 912ULS/Warp drive FP
> Just Test Flying to obtain permit
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