Gauteng Model Boat Club - Latest News

Another Scale Report

30 August 2018 

Graupner Wiesel 

As you might know, I myself have the Graupner Wiesel boat (as does Howard from my last report). It was given to me when I was about 10 by a family friend. It has gone through various incarnations of colour scheme and propulsion. I sold it to Simon as he wanted to have a boat with two propellors. He then sold it back to me as part of his fleet reduction plan. Last year, I decided to do a proper refurbishment. Pictures below show what it looked like while I was stripping it and when I added the first coat of primer. I did considerable damage to the wooden superstructure in the process. Bill from Centurion offered to do the refurbishment, and pictures are shown of his excellent workmanship.

Originally, the boat only had two propellors, but the original had three. So I added the central motor and shaft with the help of Bill. To improve the manoeuvrability of the boat at slow speeds, I did a switching system with the rudder servo. When turning left, the left motor turns off, and when turning right, the right motor turns off (as seen from the bow-to-stern view). This is done by connecting the outer motors to the speed controller via a microswitch. In this scenario, the switch is on "normally open" setting, and only once the rudder servo is at its maximum swing, does the switch get engaged and this then breaks the circuit to go to "normally closed". A video is shown on Facebook and pictures are shown above.

Graupner Adolph Bermohl 

This kit has been my dream since a very young age when I would endlessly page through a Graupner 1986 catalogue at my school library. I had the funds saved up from one of my bursaries and so approached Model Train Exchange to see if they could bring in the kit as they were agents for Graupner at that time. I ordered everything that was needed, and I still have the original invoice from Graupner from 26 April 2006. Total purchase price for the Adolph and daughter boat Vegesack came to 645, or R6000 in the good old pre-Zuma days. Note the date given for the building instructions, February 1972. A real classic.

As usual, I went straight at it and did the running gear first. The motors were put in and it sailed on the dam as a hull with motors in. I then hit a brick wall with all the detailed superstructure work needed as well as the dreaded painting. So it sat in my workshop with no progress until 2017. I then resolved to get the launching mechanism working, the bow thruster, as well as the water cooling and the water cannon. This was a considerable project, especially finding a motor to drive the threaded shaft. Eventually I found a Tamiya Planetary Gearbox which did the job. I also added a microswitch to switch on the two outer motors for when I want real speed. I then still had to overcome the fine scale work and made an offer to anyone from the Centurion Club to do it for R7000. A recent member of theirs, Andre Jordaan, stepped up to the plate and did it in three months. Some pictures of the build and the insides are below. Please also look at the video to see the boat launch on Facebook and the outer motor switching too.

As usual, I went straight at it and did the running gear first. The motors were put in and it sailed on the dam as a hull with motors in. I then hit a brick wall with all the detailed superstructure work needed as well as the dreaded painting. So it sat in my workshop with no progress until 2017. I then resolved to get the launching mechanism working, the bow thruster, as well as the water cooling and the water cannon. This was a considerable project, especially finding a motor to drive the threaded shaft. Eventually I found a Tamiya Planetary Gearbox which did the job. I also added a microswitch to switch on the two outer motors for when I want real speed. I then still had to overcome the fine scale work and made an offer to anyone from the Centurion Club to do it for R7000. A recent member of theirs, Andre Jordaan, stepped up to the plate and did it in three months. Some pictures of the build and the insides are below. Please also look at the video to see the boat launch on Facebook and the outer motor switching too.

 

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