O21 Submarine Model Dutch navy designed for RC

Model of the Dutch navy submarine built at the start of the WWII.

The 21 Class contains seven submarines still incomplete at the start of the German invasion of the Netherlands. Four of them (O21,O22,O23 and O24) escaped to the United Kingdom.

Unfortunately tree of them (O25, O26 and O27) didn't make it so far and were ceptured by the German Navy.
All tree were ordered to complete by the Germans and entered service as UD-3, UD-4 and UD-5

The submarines were built at tree different shipyards:
The O21 and O22 at Koninklijke Maatschappij De Schelde in Vlissingen.
The O23, O24, O26 and O27 at RDM in Rotterdam and the O25 at Wilton Feijenoord in Rotterdam.

The O21 class was a very modern submarine and could compare with every submarine in the years of the WWII. The hull was completely welded, a novice in that period.

The Submarine was equipped with a new Dutch invention the "Snuiver" but the conservative UK navy did'nt see the potential and removed them from the four submarines when they were completed in England. The Germans saw the possibilities and used the "Schnorkel" in the U boats in the second part of the war.

The O21 was one of the only 14 submarines who sank a German U-boat (U-96 VII C) in the WWII.

Specs:

Laid down 1937
Launched oct 1939
Commissioned 10-may 1940
End of service 2-11-1957

Displacement: 990 Tons Surfaced , 1205 Tons submerged.
Length: 77,7 m
Beam: 6,8 m
Draught: 3,95 m

Speed: 19,5 knts surfaced, 9knts submerged

Complement: 39

Armamant: 4x533mm bow tubes, 2 533mm tubes in the Stern 2x533mm externel traversing midships.

Model specs

This model is designed for RC use, best printed in ASA but PLA (+) will do. After printing and gluing the parts together it is better to treat with epoxy or Dichtol to make the hull more water and heat resistant.

The hull is split in 2 parts, top and bottom en integrated bulkheads for a 70 mm WTC. The hull is a little bit narrow.

• Hull in 2 parts easy toe reach the WTC
• Integrated mini servo mount for the bow dive planes (use a watertight servo) (TR-4 Power HD waterproof servo)
• 2 Bow types, one with the top torpedo doors open, one with closed torpedodoors

Length: 155,4 cm cm
Width: 13,6 cm cm
Height: (With Stand): 31cm

Also a smaller (slightly changed) model availeble here (1/100)
https://cults3d.com/:1624370

Note: Building this model requires more than just printing and assembling the parts. Some parts may contain small imperfections, which should not pose a problem to make a beautiful (scale) model.

Printed with: Bambulab P1s

Printebed: 200x200x200 or bigger
Filament: PLA or ASA
Temp: 210C (PLA)