Hi voyager, yes I have built the Bremen Police Boat. I did it as a review article for MMI magazine in the Feb. and March 1996 issues.
I used 2x Graupner Speed 600's 12 volt versions running from 12volt Nicad D cells (5 Ahr.). All as suggested in instructions.
Performance is very good and she planes nicely. I used a single 15 amp Electronize ESC with a simple water cooling plate bolted on the bottom. The current consumption was 14 amps with the boat stationary in the water. Boat ran on and off for about 40 minutes per session. More modern batteries will give a better time.
The fire hydrant was connected in with the cooling water pick-up, with a small scoop as pick-up and a flush outlet under water. The pumped fire hydrant water inlet was Tee'd off the tubing and it all worked very well. The speed controller ran stone cold.
Building, fairly easy although I remember that the mast, which also folds down, needs more strengthening.
If you read my article it covers the practical side of building. The RIB is a delight!
I did not like the single screw that holds the fore part of the cabin in place and I fitted a simple cover over this.
My experience of Graupner kits is that they are very good and have excellent building instructions.
I recommend Stablit Express as a wood to plastic glue which has good gap-filling properties.
I ran the model for a few months and then passed it back to the publishers. It is 40 inches long and is 29 inches high and a foot wide.
My approach when reviewing a kit is, "does it do what it says on the box"? If it does not, I say so and or offer alternative methods. I dislike the occasional review when parts are discarded and the reviewer tells you how he made a better one on his lathe!
I was given one kit to review which was just not good enough and it did not get published in MMI, I read the MB review of it though and wondered if the guy had the same kit I had!
My last review was for converting the static J class kit Endeavour at 1/35th. scale by Amati to RC. That was a lot of work but worth it. If anyone wants to build that send me a PM first!
If you want any more on the Police boat send me a PM.
Regards to alll Roy