grendel Posted October 1, 2017 Author Share Posted October 1, 2017 this universal coupling has pushed the motor back a bit further into the forrard compartment, but thats not really a problem, to get this working right. 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 2, 2017 Author Share Posted October 2, 2017 the motor bracket has now been drilled, and everything is lined up ready to be packed and fixed in place. 3 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 3, 2017 Author Share Posted October 3, 2017 fixing in the wood supports for the motor and half shaft. 1 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 4, 2017 Author Share Posted October 4, 2017 today the motor was fixed down and tweaking began. well there we are - consumption down to about 1A, the cv joint (from a model car) the bit sticking up was a steering arm, I will make up a bracket from the bulkhead to this to allow me to fine tune the angle of the joint for the lowest resistance. I also found a tiny bit of packing under the stern tube locks this in place and reduces the current consumption. also seen here is the 35mm prop. 1 Quote Link to comment Share on other sites More sharing options...
BroadAmbition Posted October 4, 2017 Share Posted October 4, 2017 Looks like you have cracked it, sounds a lot better too. Well done once again. Thanks for the video updates, easy to follow, much appreciated Griff Quote Link to comment Share on other sites More sharing options...
grendel Posted October 5, 2017 Author Share Posted October 5, 2017 tonight was the construction of a slotted bracket to brace that steering arm. 1 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 8, 2017 Author Share Posted October 8, 2017 Today we went to the boating pool, the speed is a lot better with this motor. the added bonus the motor barely gets warm. while I was here I also had a test of the motor on the 6v ballast battery - very slow. I took my ammeter along to measure current draw in the water 1.1A at 6V, 2.6A on 12V. thats about 2 1/2 hours on full speed. a good cruising speed is obtainable at about half to 3/4 stick travel. I did encounter a few problems with leaves wrapping around the prop, cutting the speed dramatically 3 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 15, 2017 Author Share Posted October 15, 2017 nearly a week with no updates - shocking I hear you cry - yes I have taken a short break, whilst I have been getting the workshop sorted. add to that a couple of days (friday and saturday) feeling seasick, as a mild bout of labrynthitis struck. hopefully now I have just about got there I can proceed with the boats particularly model #2. the next step is the prop shaft support and the rudder. Quote Link to comment Share on other sites More sharing options...
grendel Posted October 15, 2017 Author Share Posted October 15, 2017 this evening two small bits of work, firstly one of the storage cradles has cracked, and needed repairing, so this was brought into the workshop, glued , reinforced, and clamped. secondly the stainless steel strip down the bow of Broad Ambition was added, this was done with the chrome pen, and will be tested for durability in the water, this may be replaced with a real stainless steel strip if it doesnt last. 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 15, 2017 Author Share Posted October 15, 2017 eventually the cradles will be replaced with display cradles, that will have a nice brass plaque with the boat name on it. I have not worked out the design just yet for these. 1 Quote Link to comment Share on other sites More sharing options...
KaptinKev Posted October 15, 2017 Share Posted October 15, 2017 It does make me wonder if it is harder to build the model compared to the real thing concerning detail. I have seen people build model trains and it seems that you can get away with alot to the larger compared to the little. 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 15, 2017 Author Share Posted October 15, 2017 everything is a lot smaller, and you have to make a decision where to stop faithfully reproducing every tiny detail. 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 17, 2017 Author Share Posted October 17, 2017 Last night the cradle was unclamped, tidied up and replaced under model #1. model #2 has moved into the workshop in preparation for the installation of the prop shaft support and rudder. 2 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 17, 2017 Author Share Posted October 17, 2017 this evening the fitting of the prop shaft support started, I didnt want to fix it solidly into the skeg end, as I wanted to be able to remove this, so I devised a method that would allow the bracket to sit in a slot in the skeg, the solid lump will be soldered into the skeg. 4 Quote Link to comment Share on other sites More sharing options...
KaptinKev Posted October 17, 2017 Share Posted October 17, 2017 28 minutes ago, grendel said: this evening the fitting of the prop shaft support started, I didnt want to fix it solidly into the skeg end, as I wanted to be able to remove this, so I devised a method that would allow the bracket to sit in a slot in the skeg, the solid lump will be soldered into the skeg. I really do like to see a craftsman at work. 2 Quote Link to comment Share on other sites More sharing options...
KaptinKev Posted October 17, 2017 Share Posted October 17, 2017 31 minutes ago, grendel said: this evening the fitting of the prop shaft support started, I didnt want to fix it solidly into the skeg end, as I wanted to be able to remove this, so I devised a method that would allow the bracket to sit in a slot in the skeg, the solid lump will be soldered into the skeg. I really like to see a craftsman at work. 2 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 18, 2017 Author Share Posted October 18, 2017 tonight the block was soft soldered into place and the skeg replaced, motor tests done, no noticeable increase in current draw - still at 1.7A as before I fitted the support, when installing the prop shaft and associated parts, keeping the current draw low means everything is well aligned. You can see the skeg has been slightly angled down to accommodate the 35mm prop, this is 5mm bigger than model #1. I actually have 40.5mm clearance now - not quite enough to go up to a 40mm prop. next the rudder will need to be fitted. 3 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 18, 2017 Author Share Posted October 18, 2017 the bottom of the bracket is just a push fit into the slot in the skeg. 2 Quote Link to comment Share on other sites More sharing options...
BroadAmbition Posted October 18, 2017 Share Posted October 18, 2017 Looking good there. Griff Quote Link to comment Share on other sites More sharing options...
grendel Posted October 19, 2017 Author Share Posted October 19, 2017 so tonight I decided to see if I could custom build my own rudder, to enable me to give the model a bigger surface - more in keeping with the real thing, the first job, cut a slot along the centre of a 3mm shaft, over a fair distance, how to support it while I remove a fair chunk out of the middle. So a bigger chunk of brass had a 3mm hole drilled through it, then a carefully cut slot in the bigger bit, then using that slot I fitted the shaft in and cut a slot, slowly feeding the 3mm shaft in from the back. success. 4 Quote Link to comment Share on other sites More sharing options...
Bound2Please Posted October 19, 2017 Share Posted October 19, 2017 You talents have no boundaries matey Charlie 2 1 Quote Link to comment Share on other sites More sharing options...
BroadAmbition Posted October 19, 2017 Share Posted October 19, 2017 Your talents have no boundaries matey - Agreed - Do these ideas just come to him? Or does he lie awake at nights mulling over ways to achieve success? Griff 1 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 19, 2017 Author Share Posted October 19, 2017 I think they just come to me - one minute I am looking at something - the next i am trying to work out a better way of doing it, just for the challenge I guess. that rudder shaft was the third one I tried, the first was on a v block on the bandsaw, that sort of worked, but I had trouble keeping it straight, the second was the first attempt at a sawing guide, but I didnt get the saw cut properly aligned with the hole, then this was the third attempt. 3 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 20, 2017 Author Share Posted October 20, 2017 a good example was the rudder, having widened the gap for the larger prop, the rudder I had ready looked a bit small and weedy, so I looked how it was made, and thought to myself, I can do that, so set about slotting the 3mm brass rod - the rest followed on from there, I will cut some brass sheet to make up the rudder and solder the whole together. the net result is I have done the slot and have a guide tool if I ever feel like doing another. 1 Quote Link to comment Share on other sites More sharing options...
grendel Posted October 20, 2017 Author Share Posted October 20, 2017 tonight it was cutting out the rudder blade, this was cut to the shape of the gap, but clearance was left in case of weeds. Then I soldered the blade into the pivot axle ,the rudder isnt a lot longer than the stock one, but has a little more in front of the pivot, and some depth. this should give a bit better turning performance. 5 Quote Link to comment Share on other sites More sharing options...
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