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For the uninitiated what size were they? Mm or inches will do.
Approximations gratefully accepted. Would be helpful. 2 sq ft, 6 sq ft? approx length and
breadth. Hugh From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Jay K.
Jeffries Vance, While I agree with you that they
do have some effect, one of the issues that came up in reviewing the Seehund
design was how effective the control surfaces were. Through the short life
of this sub, the surfaces kept growing in size. The Perry boats are
probably an order of magnitude in size as compared to the typical PSUB and
there is an exponential factor (either squared or cubed…probably can squared ,
this is later in my classes) associated with increasing the size of a vessel
and associated control surfaces. Would have to go back and look at it but
if I remember correctly the Perry surfaces were quite large. This is not
a detriment just an observation. And while Harbor Branch (i.e. Link) may
have found control surfaces unnecessary, I am speaking more from the naval
architect’s perspective (even though I am an HB intern product J). R/Jay Resepectfully, Jay
K. Jeffries Andros
Is., Bahamas Save the whales, collect the whole set. From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of vbra676539@aol.com Spoken like a true Harbor Branch alumni. Dive planes and
rudders are, in fact, astonishingly effective when designed correctly and
incorporated into the vehicle overall. Hyco never used them, but we surely put
a million miles underwater using them on the Perry's. Even the apparently small
surface area of the dive planes were good at 1 knot and better, and could
be used at any rate to help trim the boat or otherwise adjust attitude when
operating on the bottom. The old flat planes and rudder are notably less
effective than even the simplest chord design. We've been through this before
and there might be some good info in the archives somewhere. Vance
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