Dean,
I found a couple
more items. I'm having trouble finding a picture of the flaps open. I had one
a while
back.
http://imageevent.com/albacore/albacorehistoricphotos;jsessionid=r9qabaad11.tiger_s?n=25&z=2&w=0&x=0&c=4&m=24&p=24
"The parachutes were attached to the after end of Albacore's fairwater
and successfully streamed while the ship was cruising submerged. The resulting
deceleration curves indicated that such a system effectively aided in
emergency recovery."
Project "Bailout" might not have been the most successful of Albacore's
tests but it certainly showed some creativity was at work."
http://www.hazegray.org/navhist/albacore.htm
Regards,
Brent
Hartwig
From: brenthartwig@hotmail.com
To:
personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Stopping
Flaps
Date: Mon, 25 Aug 2008 17:03:24 -0700
Dean,
You could install
some sort of stopping flaps (speed brakes) on both sides of your sub that are
curved to fit the shape of your hull. Much like a US Navy test sub USS
Albacore. Then operate them with hydraulics or adapted electric actuators
starting with a unit like the Lenco Trim Tab actuators.
I've been
planning on having this type or braking system on my winged underwater gliding
subs. With two stopping flaps on the training edge of the wings. One opening
up, and one down at the same time.
"Built as a test bed for the U.S. Navy, the Albacore featured a
tear-drop shaped hull, new diving controls, a dorsal rudder and a new
high-yield steel for her pressure hull. In addition, the Navy, at one time
or another, experimented with speed brakes, contra-rotating screws, a
drag chute, camouflage paint and three different arrangements of stern
control surfaces.
The NSF report ignited debate within Navy circles over a variety of
issues such as the merits of twin propellers vs. singles, and the sacrifice
of surface stability for undersea speed. The result of the recommendations
and ensuing debate was the U.S.S. Albacore.
The Dorsal rudder was reinstalled and enlarged and the boat
was outfitted with speed brakes. These brakes - another concept borrowed
from aviation - technology, consisted of 10 hinged panels ringing the
after part of the ship. When needed, they were hydraulically opened into
the waterflow, bringing the boat to a rapid stop."
http://www.hazegray.org/navhist/albacore.htm
http://en.wikipedia.org/wiki/USS_Albacore_(AGSS-569)
Regards,
Brent
Hartwig
From: Recon1st@aol.com
Date: Mon, 25 Aug 2008 18:55:44 -0400
Subject:
Re: [PSUBS-MAILIST] Air Tanks
To:
personal_submersibles@psubs.org
Frank I am using 12hp for my main propulsion. I gave up trying to
calculate speed but I should have
plenty. The reason for so much maneuverability is the bottom of Lake
Superior many granite boulders
etc. I will need to travel pretty fast to cover any amount of the Lake. I
am thinking of a 20 to 30' above the
bottom but at 6 knots or so when one of those big beast jumps up in front
of me, I am going to need
options. A transfer pump or sliding weight for sure would not fit my
needs. I may even have an
emergency sea anchor deployment for quick stops. Reverting back to my
drag racing days.
I loved the dry dive video. I learned much watching it maneuver I have
greater confidence that my
efforts should yield the kind of performance I am looking for. Not to
mention it oughta be a real
hoot to drive hehehhe
Dean
In a message dated 8/24/2008 8:15:39 P.M. Central Daylight Time,
ShellyDalg@aol.com writes:
Hi Dean. I think you're chasing the right idea with front and back
dive planes. I had considered that but let it go because of the extra work.
It just seems to me that back dive planes would be a real plus if you have
enough power to make them work. Did you see the "dry dive" videos? With the
center mounted dive planes the sub stays level when ascending/diving but it
would be nice to be able to angle the sub just with the dive planes. Like
you say, much like flying. I don't know how much speed you'd have to get to
make the dive planes overcome the front/back balance, but if it's close
enough to neutral, it may not take that much power.
Twin trim tanks front and back with a transfer pump would help if the
pump was able to shift weight fast enough. Maybe a sliding drop weight would
be less trouble to make. I will be able to shift the seat forward and
backward a little and I'm hoping that will give me a little angle change.
Damn, I wanna get this thing wet soon! Frank
D.
It's only a deal if it's where you want to go. Find your travel deal
here.
It's only a deal if it's where you want to go. Find your travel deal here. =