Trolleys � Optiparts Marine Equipment
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This sailing dinghy launching trolley is made out of wood and epoxy and is able to be constructed using simple tools. Most people do not have the skills or tools to weld a metal launching trolley, but this trolley is a simple, sturdy and functional alternative.
The trolley design can be readily adapted to suit both sailing dinghies and Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code small motor boats such as tinnies and inflatable boats. Nearly completed Sabre launching trolley � the padding is yet to be Diy Dinghy Trolley Zip Code glued on the bunks. When we purchased a Minnow sailing dinghy for my daughters to learn to sail in, it did Diy Dinghy Trolley Zip Code not come with a launching trolley.
I was therefore forced to build a trolley. I scoured the internet and found many designs, most of which suffered from poor design and construction and did not suit my needs. I therefore developed my own design constructed out of wood. My Minnow trolley was very simple, but effective. With a pram bow and a relatively flat Zip Code Trolley Dinghy Diy hull, I did not bother building bunks for the trolley. I simply covered the frame with foam pool noodles and sat Diy Dinghy Trolley Zip Code the dinghy straight on top. We subsequently purchased two Sabre sailing dinghies, both of which had woeful launching trollies, but for different reasons.
One trolley was stupidly heavy and had small wheels including one at the front � perfect for launching off a concrete boat ramp, but terrible for trying to launch and retrieve the boat off a sandy beach.
The other trolley was too short, had poorly formed bunks and wobbly wheels. The boat would regularly fall backwards off the trolley, the hull was not cradled well on the bunks, and the wheels were constantly on the verge of falling off.
Using the knowledge gained from building the Minnow trolley, I have refined the design and built two new trolleys for the Sabres as described Diy Dinghy Trolley Zip Code below.
I have noted in the text below where I think the design can be further improved. I have also written some Trolley Dinghy Diy Zip Code notes in a separate post on how I think the design can be improved further here.
When planning to build a Diy Dinghy Trolley Zip Code boat launching trolley, there are two primary considerations that will dictate everything else. Most sailing dinghies have a strong point under the mast step given the loads that are transmitted through the mast and at the back of the centreboard case.
The aft bunk should be positioned such that the bow of the boat has positive weight ie the boat will not accidentally tip off the back of the trolley! The best way to identify this point is to carefully place the boat on Diy Dinghy Trolley Zip Code the ground and place a length of timber parallel to the transom under the boat.
Move the boat fore and aft on the timber until the balance point is found. Then move the boat forward until the desired weight at the front Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code of the boat is achieved.
The location of the timber under the boat will be the best location for the aft Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code bunk. If your dinghy is fitted with a self-bailer, you should ensure that the bunks do not interfere with the operation of the self-bailer while the boat is on the trolley.
Opening the self-bailer while onshore can be useful to drain water Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code from the cockpit while washing the boat, drying it after use, and during storage to make sure water does not accidentally pool in the bottom of the boat. The trolley width was an important consideration for me because I needed to be Diy Dinghy Trolley Zip Code able to get the dinghy through bollards with 1. The trolley width is also dictated by needing to provide suitable clearance Diy Dinghy Trolley Zip Code between the hull and the wheels.
If the clearance is too small, then the dinghy hull will foul the wheels when Diy Dinghy Trolley Zip Code trying to launch and recover the boat if the boat is not perfectly aligned on the trolley. The width restriction of Dinghy Trolley Code Zip Diy the bollards and use of wide wheels that would roll across sand meant that the bunks on my trolley had to be sufficiently high for the hull to clear the trolley wheels should it not be perfectly aligned when launching and recovering Trolley Dinghy Code Zip Diy the boat.
One of the biggest challenges in making a dinghy launching trolley is sourcing all of the materials. I purchased everything I needed from Boat Craft Pacific epoxy , my local hardware store, local chandlery and eBay.
I also needed aluminium rod Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code purchased from an extruded aluminium supplier, Capral Aluminium and closed cell foam purchased from Clark Rubber in Australia. I recommend that you start by purchasing the wheels and a matching axel.
They will be the most difficult to find and match. Build the rest of the trolley to suit them. They came fitted with roller bearings, but they can be easily popped out Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code and replaced with the supplied nylon bushes which are much better for wheels that are going to be regularly submerged in Diy Dinghy Trolley Zip Code salty water. I did not have access to a power saw, such as a mitre saw, for this build.
If you are planning to use a hand saw, I highly recommend ensuring that the saw is sharp. Your cuts will be much easier, faster and accurate with a sharp hand saw. Construction of the trolley is based around using simple tools, readily available wood, Diy Dinghy Trolley Zip Code and epoxy and fibreglass. Five primary areas require construction, as described below.
I recommend constructing them in the order presented. The Diy Dinghy Trolley Zip Code actual building time for this trolley is not long � maybe 10 hours or so. What takes the time is the Diy Dinghy Trolley Zip Code time for the epoxy to go off and paint to dry. Where possible, apply wet on wet. Read the instructions for the products you chose to use to see whether wet on wet application is possible. I mounted the axle externally on the Minnow trolley using electrical conduit saddles screwed to the wooden frame.
These are rapidly rusting! The screw holes are also Diy Dinghy Trolley Zip Code potential points of entry for water that will promote wood rot. A better method used on the Sabre trolley is to Diy Dinghy Trolley Zip Code encase the axle in a laminated box structure and a bed of epoxy filler. This creates a good connection between the Diy Dinghy Trolley Zip Code axle and trolley that will not rust.
While epoxy does not bond well to aluminium, this is not an issue. Even Diy Dinghy Trolley Zip Code if the bond breaks, the axle will remain in place because it is encased in the timber box and the wheels on either end will prevent it from sliding out of the box.
The inside of the timber case has been epoxy sealed so that water can not penetrate the wood, even if water gets in between the axle and epoxy bed.
Cut the axle to the correct length allowing for the wheels and washers and drill the holes for the retaining zip ties before embedding in the axle case. Trial fit the wheels to the completed axle case before proceeding. Laminating the axle case. The Diy Dinghy Trolley Zip Code axle case on the left is waiting for the placement of the axle in a bed of epoxy filler before completing. The case on the right is complete. Room for improvement: On the Sabre trolley I encased the axle with wood Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Code Zip on four sides before epoxy gluing the aft bunk and rails to the axle case.
On future trolleys, I will only encase the axle on three sides with wood, with the fourth side being formed by the lower section of the aft bunk. This will save material and simplify construction. The joint between the rails and the axle case is a simple epoxy glued lap joint. Note that an additional section of wood has been laminated to the outside of the rail.
This effectively Diy Dinghy Trolley Zip Code doubles the surface area of the joint, thereby increasing the strength of the joint. Laying out the rails in preparation for epoxy gluing to the axle case and toe. Note the additional piece of wood to be laminated to the outside of Diy Dinghy Trolley Zip Code the rail to increase the strength of the joint with the axle case.
The force of pulling and pushing the trolley is all transmitted through the junction between the rails and the handle T-piece. Achieving sufficient bracing through this joint is critical. The Diy Dinghy Trolley Zip CDiy Dinghy Trolley Zip Code ode joint is made up of three elements epoxy glued together.
They should be glued together in the following sequence:. The toe Diy Dinghy Trolley Zip Code epoxy glued in place, leaving space to accept the handle T-piece. Epoxy gluing the handle T-piece to the rails and toe. Note Diy Dinghy Trolley Zip Code the rope that I used to hold the top of the T-piece in position while the epoxy glue went off. A nail subsequently removed at the bottom of the T-piece stopped it from sliding out of the slot between the rails. Nail at the bottom of the T-piece to prevent it sliding through the slot between the rails while the epoxy glue goes off.
The nail is removed once the glue has gone off. Brace tying the handle T-piece to the rails. All of the odd angles in this joint can be easily cut using a hand saw and shaped using the angle grinder Diy Dinghy Trolley Zip Code fitted with a sanding flap disk. I have found this joint to be sufficiently strong even when pulling and pushing the Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code dinghy over soft sand. I regard the toe as being sacrificial � ie, it will wear down over time from being Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code constantly struck on the ground. You may like to protect the toe with a metal plate.
The handle is simple. Drill a hole slightly larger than the chosen size of dowel and simply glue it in place with epoxy mixed with filler Diy Dinghy Trolley Zip Code Diy Dinghy Trolley Zip Code to make a glue paste. I recommend drilling the hole before epoxying the handle T-piece in place. Make the handle as Code Diy Trolley Zip Dinghy thick and as short as you can comfortably hold to minimise the risk of breaking the handle. Also choose a dowel Diy Dinghy Trolley Zip Code size such that sufficient material is left around the hole drilled through the T-piece.
I initially tried to avoid building bunks Diy Dinghy Trolley Zip Code for the Minnow trolley, considering them too difficult to construct. In fact, custom moulded fibreglass bunks can be easily built using Diy Dinghy Trolley Zip Code the following steps:. Epoxy gluing the rough cut front bunk and horizontal cross brace in place. The rear marine plywood rough Diy Dinghy Trolley Zip Code cut bunk epoxy glued to the back of the axle case and rails. Detail of the joint between the rails, axle Diy Dinghy Trolley Zip Code case and aft bunk.
Room for improvement: I will not use the horizontal brace for the front bunk on future trolleys. I believe that the marine plywood epoxy glued and filleted to the rails and reinforced with some mm wide, gsm double Diy Dinghy Trolley Zip Code bias fibreglass tape will be strong enough.
This will permit easier and faster construction, while also eliminating the joint between the Diy Dinghy Trolley Zip Code fibreglass bunk and the horizontal brace. It also reduces materials and eliminates weight at the front of the trolley. Room for Diy Dinghy Trolley Zip Code improvement: Make sure the plastic sheet acting as the mould between the hull and the laminated fibreglass bunks is perfectly flat Diy Dinghy Trolley Zip Code before starting the first layer of fibreglass.
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