Welcome to the
PSUBS Personal Submersibles
Carsten Standfuss - Sgt. Peppers

Sub name: Sgt. Peppers
Designer: Carsten Standfuss
Builder: Carsten Standfuss
In 1987-88 I build a One man Submarine which is
called "Sgt.Peppers". During this time it was the 
smallest manned submarine in the world and since 
1989 it was in the Guinness Book of records as
"smallest manned submarine in the world".
Today it is not in order to work but displayed
in a German museum. 

Also here some technical data: 

First dive:		19.09.1987
Length over all : 	2,98 m
Weight          :  	575 kg
Equipment: two bow thruster, one for side, one for deep control
two stern thruster, ond for side, one for deep control, one stern main engine
(rebuild car-engine-starter), Hull streamlined like a torpedo with the pilot
lying with his head to the bow acrylic front hemisphere, Four acid batteries in 
the keel (from bigger vans filled with oil on top of the acid - pressure 
compensated by a plastic bag - was orignial a bottle with hair cleaner soap-).
The keel with the batteries and the bow thruster and the outside deep measure 
can be relased in emergency as droop weight. 
The boat 8 mm thickness high density steel hull was designed for a 
collapse deep 
of 300 meters and more, so the working deep is maximum 150 meter.
But my private option is never to dive in areas deeper than 60 m because of the 
option to leave the boat in emergency with the scuba gear. 
The internal Live support system ist made from a old russian oxgyen circle fire 
fighting scuba gear. I rebuild the gear, but for working I can use it in two 
ways: First way is to cyle the oxygen/air flow with a electric thruster fan two 
the absorber. But this works only some hours and stops action if you lost your 
battery power. Better way is the pilot mask (same design like a face mask in a 
fighter airplane) which cycle the oxygen by the lungs of the pilot on the 

(Sorry about my languages - I am a german living near Bremen, Northern 
Germany - 
no english languages speakers around here - conected to the internet only some 

The concept desgin of the small sub is very good, later I built one of the four 
batteries out and a small pressure proof bouyance-tank in, also I build in a 
small hatch on the top, only usable on lake without waves. 

But the electrical and mechanical equipment of the boat a made from low-tec 
material so I had often troubels with leaking vales , burning switches etc.
Four every two hours diving I had to work after this one week on the sub, for 
example to recarge the batteries - I have to open every battery cell which means 
to put the pressure hull from the keel open many small screws etc.  

The view from the submarine to forward is very good, but the view to the stern 
is very bad (there is no way to look to the stern from the inside of the 
submarine). The concept was to use the boat as a daughterboat from a sailing 
yacht to hunting a treasure wreck in the bay of biscay. For this reason the sub 
is so small - but sorry to small for offshore operation. The treasure project 
was later cancelled beacuse of the impossible to sail with the sailing yacht 
with the submarine on the forward deck (- impossible to lift the sails -) and a 
other main reason was that the sub has no gyro-compass - and no place and power 
for a gyro - and the normal magnetic compass works very, very bad because 
of the 
currents of the thrusters and main engine. 

After a couples of dives I stopped to use the submarine and today it is on 
display in a Museum in Northern Germany as the "Smallest Manned submarine 
in the 
world" (it is ?)

26 Aug 1999 

Please add to my part on the page that Sgt.Peppers was reftit in 1999
and is sometimes in service but normaly on display in Germany on the
"Automuseum Asendorf" near Bremen, Germany.  Also that the car starter
engine has removed and a Minn Kota is now the main engine. Also that all
engines and batteries are now air pressure compensatet for better

Carsten Standfuss - Sgt. Peppers, full view

Carsten Standfuss - Sgt. Peppers, closeup of bow
Carsten Standfuss - Sgt. Peppers, closeup of side
Carsten Standfuss - Sgt. Peppers, on surface of water
12 Oct 2001 Drawings of Sgt.Peppers Carsten Standfuss - Sgt. Peppers, drawing New Gif25 Apr 2002 Carsten Standfuss - Sgt. Peppers, drawing

Back to The Top Back to PSUB Picture Gallery page Back to the Home Page

This page accessed times.
Page created by: Ray Keefer