Page 30 of Model Boat Kits by Model Slipway

fillers for fibreglass holes and gaps can be filled using a `soft paste car-body filler available from car accessory shops or diy stores when the filler has hardened sand flat with fine wet or dry paper for plastic again use a `soft paste car body filler or humbrol plastic filler available in model shops alternatively make your own filler by adding styrene shavings to any suitable solvent such as acetone in a small glass jar screw the lid on tightly to keep the solvent from evaporating and leave overnight the plastic will dissolve and form putty you can then use it as a paste to fill any gaps etc if the paste is too thick add more solvent if it s too thin add more plastic adhesives adhesives may be in tube form polystyrene cement or in liquid form such as humbrol liquid poly or mek methyl ethyl ketone which is best applied with a brush the technique is to apply a few drops of the solvent and the glue will run down the joint by capillary attraction the following glues are recommended fibreglass to plastic plastic to plastic whitemetal to whitemetal whitemetal to plastic wood to plastic brass to plastic rubber fendering window glazing two-part epoxy devcon araldite speed epoxy 10 min or 1 hour ordinary plastic solvent revel liquid poly slaters mek two-part epoxy 5min or thick superglue pro-bond mfa etc two-part epoxy or thick superglue two-part epoxy thick superglue or contact adhesive r/c modellers craft glue or thick superglue contact adhesive uhu bostik weldbond rc modeller s craft glue or clear contact adhesive uhu bostik etc no superglue as this will frost the glazing propshaft to install the propeller shaft and tube drill a hole into the hull using a drill smaller than the tube diameter and then open it up with a round file before fixing the prop shaft/tube to the hull using emery paper lightly abrade around the gluing area in order to provide a good key use masking tape to hold assemblies in place and to allow final adjustment apply a small amount of epoxy to hold in place when set and you are happy with the alignment apply more epoxy over the joint inside and outside the hull when dry sand with medium grade sandpaper applying grease into the propshaft tube or stuffing box is not always the best idea a tube packed with grease can create a lot of drag on the rotating shaft which can slow the motor and cause poor performance and overheating it is recommended to apply light machine oil to the bearing ends motors mounts there is such a variation in motor performance that generally it is best to follow the kit manufacturers recommendations to remove the motor in seconds a simple motor mounting can be made using triangular blocks of wood and rubber bands proceed as follows fit the motor to the coupling and shaft hold the motor to roughly the correct position to assess the size of the blocks cut blocks to suit your application pre-drill and fix hooks or large head screws apply epoxy glue to the underside of blocks and place either side of the motor while the glue is wet the blocks can be pushed inward to raise and align the assembly an alternative method of installation is to screw or bolt the motor to a block or blocks glued to the hull motor suppression

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