<DOC>
<DOCNO>
1323
</DOCNO>
<TITLE>
an investigation of the use of an auxiliary slot to
re-establish laminar flow on low drag aerofoils .
</TITLE>
<AUTHOR>
cumming,r.w., gregory,b. and walker,w.s.
</AUTHOR>
<BIBLIO>
arc r + m.2742, 1950.
</BIBLIO>
<TEXT>
  the use of an auxiliary slot on a laminar-flow
aerofoil has been investigated to check whether laminar
flow can be re-established by suction at the rear of the region
of deposited dirt, flies, etc .
  results indicate that in the absence of unfavourable pressure
gradients, it is possible to re-establish a laminar
boundary layer by removing a little more than the whole turbulent
layer reaching the slot, and preliminary estimates
suggest that with efficient ducting it should be possible to achieve
a reduction in overall effective drag coefficient by
this means .
</TEXT>
</DOC>
