
Builder: Shipyard
" De Hoop "
at Neder Hardinxsveld
( yard and village name is history )


Keel laid : 2 Jan 1929
launched: 30 may 1929
Steel riveted with ice strengthened bow.
Lbl : 20.25 meter
Loa : 21.30 meter
beam: 4.89 meter
draft : 2.10 meter
Boiler and engine made in 1928
by I.A. Kreber of the
VLaardingsche Machinefabriek.
( They still exist but do not know about their old products anymore. )
Boiler : Single Scottish
Cap : 8 tons water
pressure : 15 kg/ cm2
safety valves : Twin 15ato and 15.5 ato furnace : 1
fuel : coal ( Colombian or Venezuelan )
containing 8700 Kg/cal
Engine :
3 cyl expansion ( HP , MP and LP )
power : 175 HP ( steam )
Rev : 175 revs/ min maximum
Aux. : 1 cyl exp with 220 V -dc generator.
pump : 2 cyl Worthington ( gen.purpose )
ejector : Giffard
Propeller: 1
Diameter: 1.69 meter
Max speed : 21 km = 11 m/h
Bunker cap: 20 tons
Fore and aft tanks : 14 tons water

P. Van Loon - Stoomsleepdienst - "HARMONIE"
1929 - 1951
Ordered by:
Mesrs van Loon at Vreeswijk
in December 1928.
Accepted 1st October 1929
named as:
SS " Harmonie 6 "
and sailed until June 1951.

N.V. Verenig De Onafhamkelyke Sleepdienst
1951 - 1967
Taken over by:
Verenigde Onafhankelijke Sleepdienst
at
Rotterdam July 1951 and re-named
Volharding 1
Handed over to the Maritime Museum " Prins Hendrik
at Rotterdam for the symbolic amount of Fl 1,=
on 30 June 1967.
Since 25 may 1978 under supervision and care of the
"Vereniging Volharding 1 "
who keeps her afloat and in working condition.
Submitted by:
R.J.Chr van den Ende