Command Boat 90
Scratch built at 12th scale from pictures and profiles of the internet. The boat was originally built in Sweden a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet
Speed: 40 knots (74 km/h) Draught: 0.8 m (2 ft 7 in) Length: 15.9 m (52 ft) Overall; 14.9 (48')
Complement: 3 (two officers and one engineer); Up to 21 amphibious troops with full equipment Armament: 3 × Browning M2HB machine guns; 1 × Mk 19 grenade launcher; 4 naval mines or 6 depth charges .
The Model
I was attracted to this boat due to its great performance and maneuverability, this was mainly due to the use of twin water jets as the main propulsion, this is a trade off with efficiency.
So my start point was to collect as much information as possible about the boat this involved collecting pictures and profiles of the craft from various sources.
http://www.dockstavarvet.se/products/combat-and-patrol-boats/combat-boat-90-h/specification/
Eventually I found some plans of sort :-
http://laurell.today/boats/combat/plans.html
My Dad was a boat builder in the days of wooden yachts, and had showed me how to make plans and frames from a line drawing. I went about this first by creating a prototype about 24 in long out of light ply. I then created full size plans of the model to be made.
Pictures of small prototype finally painted plain green.
The Main model
Used my computer to print out the frames onto paper, cut them out and used them as templates for the ply ribs.
The construction was simple chine style, with 1.5 mm ply.
I tried to build jet drives but failed to produce a effective unit.
So reverted to propshafts which worked out well with better control and the boat can spin on it own axis by putting one engine in reverse the other in forward and adjusting the twin rudders.
That it for now, hope it was of some interest
Speed: 40 knots (74 km/h) Draught: 0.8 m (2 ft 7 in) Length: 15.9 m (52 ft) Overall; 14.9 (48')
Complement: 3 (two officers and one engineer); Up to 21 amphibious troops with full equipment Armament: 3 × Browning M2HB machine guns; 1 × Mk 19 grenade launcher; 4 naval mines or 6 depth charges .
The Model
I was attracted to this boat due to its great performance and maneuverability, this was mainly due to the use of twin water jets as the main propulsion, this is a trade off with efficiency.
So my start point was to collect as much information as possible about the boat this involved collecting pictures and profiles of the craft from various sources.
http://www.dockstavarvet.se/products/combat-and-patrol-boats/combat-boat-90-h/specification/
Eventually I found some plans of sort :-
http://laurell.today/boats/combat/plans.html
My Dad was a boat builder in the days of wooden yachts, and had showed me how to make plans and frames from a line drawing. I went about this first by creating a prototype about 24 in long out of light ply. I then created full size plans of the model to be made.
Pictures of small prototype finally painted plain green.
The Main model
Used my computer to print out the frames onto paper, cut them out and used them as templates for the ply ribs.
The construction was simple chine style, with 1.5 mm ply.
I tried to build jet drives but failed to produce a effective unit.
So reverted to propshafts which worked out well with better control and the boat can spin on it own axis by putting one engine in reverse the other in forward and adjusting the twin rudders.
That it for now, hope it was of some interest
Liked by Skydive130 and Martin555 and
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I did try to make some but they were unsuccessful.
I have seen them fitted to other smaller CB90's but the crash stop looks pathetic. and jet dives are not very efficient.
I would love to take a trip on a real one!
I've just found a plastic kit version by Tiger
Here's a YouTube link to an unboxing:-