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Richard98

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Richard98 last won the day on April 25

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  1. Trevor, Don't like the sound of the ball and dimples in the tube. Might be easier to start from scratch with a new piece of tube and pin. Ikon drawing shows what is needed, including the nylon fitting at the top. I think Sails etc now use a slightly larger dia tube and nylon fitting than that shown on the drawing. I seem to remember that from recently building my Alternative, but cannot access it to measure. Worth checking since it makes fitting the line easier. Adjustment is not possible since it is important to have the ring at the top as close as possible to the deck. This is very important, especially to take advantage of the low mast position of Isis. Richard
  2. Trevor, Could not find it either. However, have a look at the Ikon drawing located in Sails etc downloadable documents to see details of the tube fixing and the arrangement of the line. Use D50 dyneema for the line and pass down from the top, each side of the pin. Make the knot outside the hull, I use a bowline, approx 10mm loop. Then hook the long piece of line back up the tube using a piece of rigging wire. Easy and quickly done. Do not forget to seal knots in dyneema with superglue. The knots will come undone otherwise. Ensure no glue gets on the pin or on the tube, future replacement will be difficult otherwise. This is an excellent jib boom swivel for the No1 rig and works in the lightest of breezes, also transfers the load to the hull so no deck displacement to slacken the forestay. A fillet web or recessed deck moulding transfers the deck stiffening to the other rig eyebolts in addition. Richard
  3. Hi Trevor, If this is an aluminium tube that exits the bottom of the hull and also the deck; then the following should help. With the tube removed completely, roughen the inside of hull and underside of the deck to prepare for adhesion. Similarly roughen the tube for approx 10mm each end. Note: the tube should have a little rod through it just above where it enters the hull. This is to secure the line that runs up the tube for the jib boom pivot. Tack the tube into position with 5 minute epoxy - just a dab. Mask around the area to be fixed. Electrical tape is best, not masking tape. Stick a piece of electrical tape over the hull exit. When the tack has set, mix some decent epoxy and dap a very little around the hull exit hole from the inside ( a cocktail stick is the ideal tool) The tape will allow the epoxy to flow the space between the tube and the hull - only a drop or two though. Then thicken the epoxy with colloidal silica or similar, to a "mayonaise" consistency and form neat fillets around the tube, top and bottom. The tape will prevent excess eopxy and make a neat job. Remember it does not need a lot, 10mm up/down the tube and added to the tube radius is more than sufficient. When the epoxy is nearly set, it may be gently formed to neaten and the tape removed. Epoxy and fillers are readily available in small quantities from model shops on line. To refit the line down the tube have a look at the Sails etc web site, where a decent description of the simple process may be found. Let us know how you get on. Richard
  4. Thanks again Mike, that will work. Just going to look for a suitable (cheap) boat. Point noted about avoiding prop foul. Swordsman was a beautiful (full size) hull, from Fairey Marine if I remember. Richard
  5. Hi Michael, Although not familiar with the Krcar, Peter Wiles is usually found at the top end of competition and his other designs are still very useful performers so I can see no reason why this design should not "be suitable for your lake" £300 is not a huge budget so, in my opinion, good quality sails and mast in good condition with decent foils (fin and rudder), possibly together with a modern ballast are the most important considerations. These will contribute more than anything to performance, far more then the hull. So if your boat ticks some , or all of these boxes then go for it. With the above; most modern hulls and the Krcar is such, are quite capable of good competitive sailing. Let the forum know what you decide, Michael. Richard
  6. Thanks Mike, that makes a lot of sense. I assume that the casualty can not be too far away for this though. Any sort of motor boat would do the job ? Richard
  7. I have listed a request, in the general forum, for any info on a remote control rescue boat. However if anyone makes or equips such boats; would appreciate any advice. Richard
  8. Currently building my second Mini40 trimaran and recall from frequent experiences, these things capsize. I know the use of radio control rescue boats is not unusual. Any ideas on best type of (cheap) boat and the proven way to equip for rescuing boats in trouble. Including IOMs etc and not just multihulls. Richard
  9. Alternative going like a train, but since re-rigging with those nice BG sails and a Pierre Gonnet mast just could not seem to get the best sail shape on all points. I had used a high tech roller setup to achieve an accurate pre-bend and it matched recommendations, but just did not feel right. Bit the bullet and took the sail off and decided to revert to the low tech bend method, as suggested aeons ago by a sailor who subsequently won the Worlds. To quote the instructions: " Just bend it around your middle". Now, of course, the gooseneck is fitted and the shrouds. I recently fixed the mast crane to avoid rotation and between this and the gooseneck body, maintaining the bend axis is very easy. So yes; rig and drill the mast before bending this way. First I removed the existing bend, then proceeded to gently bend to match the reversed luff shape. Simple. Refitted sail and it looked good, as they say. Proof of the pudding was sailing this morning. Simply fantastic ! Previously I was aware that performance fell off noticeably depending on initial set up. Either upwind or reaching. Boat pointed brilliantly and now accelerated downwind also. The excellent sails can now do their job. Just down to me now, thanks to that "gut feeling" and some old but good advice. Richard
  10. Marblehead swing rig sails, masts, spars. Starting a new Mini40 project and determined to get foiling this time. Going for swing rig and Marblehead sails are easily altered as a starting point. NOT REQUIRED NOW. Easier to make sails from scratch. Easier than modifying. Richard
  11. Richard98

    Show us your IOM

    Hello Frayz, pleased to hear you are enjoying radio sailing. Not as glamorous as yours, but I did at least select the cedar strips to give some contrast. My Alternative design by Brad Gibson. Richard
  12. Shame you have been advised against multihulls. I built a Mini40 trimaran and most of the fun is in the solo sailing and experimenting with these amazing boats. I returned to "main stream" One Metre (IOM) sailing and sold my trimaran, but I do miss the buzz of sailing it and the constant design tweaking and simply messing about trying out new ideas. Ironically this used to be a significant part of IOM sailing too. I am going to give it another go as there seems to be a little more info out there now, especially on the magic of getting these boats foiling. Have a look on U tube at the exploits of Ian Holt who is Perthmini40man and from whom a lot of the magic may be learnt. Richard
  13. Result of rudder servo modification. Boat felt much tighter and the benefit of using exponential settings on the rudder control is now full realised. Easy to dismiss as a placebo effect the cynical may say. After all how can merely repositioning the rudder servo have a noticeable effect ? Well it does: the complete absence of any play, combined with the expo setting is, most definitely tangible. An additional bonus, particularly on the start, is the ability to increase the braking effect of the rudder. Greater angle is available compared to a linkage. Just try to avoid using it while sailing of course. A lovely little moulding from Dave with obvious attention to detail. For example; the servo retaining arrangement and the rudder shaft adaptor. What next ?
  14. Been sailing Alternative for a while now, really pleased with performance. Decided to ditch central rudder servo and linkage and install Dave Creeds neat little aft mounted servo moulding. Easy bit of surgery and the rudder is now rock solid, with extreme rotation available for braking ! Had to sort out aft sheet turning block, since the bolts fouled the servo moulding flange. David Potters little pulley mounting bracket solved the problem with the added bonus of easy dismounting of sheet drive lines. It may go against common sense to place weight at the ends, but the little Hitec servo only weighs 28 grams. The overall weight reduction was nearly 40 grams. Yes I will add extra corrector weight. Richard
  15. Richard98

    Alternative build

    Second picture here. Cannot download more than one at a time. Preview shows both but after submitting one is deleted.
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