Sunday, January 31, 2010
Friday, January 29, 2010
These counter flap hinges I'm using for the flaps on the new cratch table are lovely, but what a pain they are to install. The idea is that they will allow the side table flaps to fold over flat against the main part of the table but will lie flush when the table is open. So to get them flush with the table surface I have to carefully cut out one layer of ply in the plywood. Well two actually because there is a wafer thin outer veneer layer. This veneer is very fragile and splits easily so the problem has been how to do the cutout without fraying the edges of the veneer.
Wisely, I worked on practice pieces first and eventually succeeded by using masking tape to protect the edges. However that was the least of the problems. After the first layer for the hinge plate, you have to do a further deeper step to accommodate the hinge pin barrels, then a hole to let the central bass joining piece swing.
Plywood, once you get inside it is nasty. It splits and cracks easily yet is quite hard because of the embedded glue. This test piece took me a couple of hours to get right and on the real thing I have to do eight of them, two for each of the four hinges. However they should be a lot quicker now I know what to do, but if I mess one up I'll have to cut a new piece of wood and start all over again.
Thursday, January 28, 2010
Tuesday, January 26, 2010
Friday, January 22, 2010
Thursday, January 21, 2010
Wednesday, January 20, 2010
About 15 or more years ago our friend Phil got me drunk at lunchtime in a pub in Bristol and we staggered out in the rain and somehow found ourselves in a Rohan clothing shop where I was pesuaded to hand over what seemed a huge sum of money for a waterproof coat.
I wore that coat on at least a thousand occasions over many years until the Gore-tex membrane ceased to work (as they eventually do). I still have the coat and apart from the waterproofing it is still in very good nick. In subsequent years I also bought from Rohan a fleece, now ten years old and going strong and some wonderful "winter bags" trousers which have comfy thermal linings. All good stuff for boating.
So when I needed a new waterproof coat at the end of 1996 I got another from Rohan. It cost £149, weighs nothing, but is windproof and waterproof, has lots of waterproof pockets and all that. Kath bought herself a different Rohan waterproof a couple of weeks later in the sale (£87).
Sale time 2010 came around and we went to Rohan in Guildford to buy a fleece for Kath and a new one for me, as the old one whilst still sound is now a bit grubby. Whilst we were there we mentioned in passing our only complaint about our waterproofs which is that in the awful weather we some times boat in, the rain gets up the sleeves and you get wet forearms.
Ah well said the shop lady, then under our guarantee the coats have not performed to spec and we will give you the full price you paid in part exchange for new coats. This after three years hard wear. She rang this morning confirming from their computer records the dates and prices we paid, and so were off to get new coats for which we'll have to pay very little.
I don't know about you, but I reckon that's a very good deal. And we didn't even ask for it! So I'm happy to offer this testimonial. Rohan stuff is not cheap, the designs are often quirky but clever but the quality is worth the money and it seems their guarantee actually means what it says.
Tuesday, January 19, 2010
Saturday, January 16, 2010
Thursday, January 14, 2010
The breakthroughs came when Rick realised that the leg doesn't need to telescope up if it is folded away outside the folded table and when David identified hinges which allow the side extension flaps to fold flat on top of the table. Confused? OK let's do the pictures.
To stow the table, first the flaps fold up and over to lie flat on the table using a clever hinge identified by David who spotted one on a sewing machine table. These hinges lie flush with the table top. Now see the next diagram viewed from the side of the tableThe table top, hinged at A is lifted slightly (1) to allow the leg, hinged at B to temporarily drop to the floor (2) so the table can drop against the wall (3).
Neat or what?!
Monday, January 11, 2010
Here it is in plan view. The table is shown in red. The shaded areas marked coal and logs are knee high seat boxes. I've shown the doors (swung half open) into the main cabin of the boat. You can already see that the table overlaps the seats and so can't fold back to drop against the forward bulkhead. Notice the red dotted lines. These mark flaps which will fold in behind the table when it drops. The dotted T shaped thing is the supporting leg, which can be better seen in the side view picture below.
There is the leg in blue. It will be hinged to the bulkhead at the bottom, and must telescope up to fold away vertically when the table is dropped to the vertical storage position.
The final picture shows the view looking forward from the cabin into the cratch.
There is the table in red, hinged along its top edge. The flaps (dotted) are folded in to avoid the seat boxes, and the T shaped support leg is folded in behind the table.
The idea looks ok on paper. I have to figure out how best to make a telescoping leg and attach it to the floor, and how to give adequate support to the folding flaps. Rick suggests some sliding bolts at the top(as seen here) end of each flap. Then the T of the leg should support the outer end.
I can make the leg out of two bits of aluminium box section tube, one sliding inside the other with holes and pins to lock in at the shorter and extended lengths (like extending tent poles). Not sure how I would fix the T bar to the top of the leg though.
Anyway there it is. I hope to have a go at it when our conservatory (my workshop) gets above freezing. Any comments or suggestions most welcome.
Friday, January 08, 2010
Those who know Herbie's mooring can see from this shot, how much closer we are to the boatyard building since we moved up to Humbug.
No I didn't cross the canal on the ice to take the picture, although I was tempted. I used the bridge.
Wednesday, January 06, 2010
I must try to get out there soon, but we're pretty much stuck at home now. The snow is really deep. Nine inches this morning and it has been snowing again since. I bet the canal looks pretty. Strangely though it doesn't feel all that cold.
Grace struck out this morning, but didn't get all that far. She looks like Captain Scott crawling to his dugout!