At the last hurdle of the recumbent rebuild, it failed. A bodged seat mount cracked and left me with a recumbent seat that rapidly rotated left and dropped back to around 20 degrees. Good for racing if it wasn't so high!
If I get up early tomorrow I may see about building a new mount, but the bike needs to be ready for midday. I may just take the fixer and phone Kevin @ D-Tek to see if I can hire something for the Christmas period. I'd really got my sights set on a holiday of pottering round the fens.
The chainline also appears to be a little off. I'd hoped to get away with a straight drive side, but the geometry has worked out slightly different between the old frame and the new.
The chainline also appears to be a little off. I'd hoped to get away with a straight drive side, but the geometry has worked out slightly different between the old frame and the new.
I can now appreciate why designers [of anything] put 'pen to paper to make drawing' before anything else happens. It's been quite an education to discover time and time again what I hadn't accounted for, when I thought I'd considered everything from the outset. It happened again this evening. This time it was the remote steering rods interfering with the chain. Luckily, the chain missed the rod on the drive side by 5mm on either side. How did I manage that? Complete fluke. I haven't been quite so lucky on other occasions.
I can now appreciate why designers [of anything] put 'pen to paper to make drawing' before anything else happens. It's been quite an education to discover time and time again what I hadn't accounted for, when I thought I'd considered everything from the outset. It happened again this evening. This time it was the remote steering rods interfering with the chain. Luckily, the chain missed the rod on the drive side by 5mm on either side. How did I manage that? Complete fluke. I haven't been quite so lucky on other occasions.
Don't worry to much - even Boeing have problems with two parts trying to occupy the same physical space when they try to build a design - and that's with sophisticated 3D modelling to try and spot at the design stage when its happening.
At the last hurdle of the recumbent rebuild, it failed. A bodged seat mount cracked and left me with a recumbent seat that rapidly rotated left and dropped back to around 20 degrees. Good for racing if it wasn't so high!
Bad luck. Don't rush it, have another proper go when you get back.
On the bright side, I now have the most expensive and specific tool I've ever owned. urc... meet the Cyclus 1" headtube reamer and facer![1] :-)
Jon
[1] I can get the 1 1/8" reamer for a little extra, and probably will.
Yay! Well played, that man! /More/ tools, I say. More! More!
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Dave Larrington - http://www.legslarry.beerdrinkers.co.uk/ World Domination? Just find a world that's into that kind of thing, then chain to the floor and walk up and down on it in high heels. (Mr. Sunshine)
The head tube thing only reams down about 10m into the headtube, the seat tube thing has to reach further.
The head tube diameter is ground very accuratly to a set diameter, the seat tube reamer is ajustable over a diameter of 0.5 mm or so, you basicaly ream it out untill the seatpost will go in, or you ream right thru the seat tube and your boss buys the punter a new frame (bugger).
The head tube thing only reams down about 10m into the headtube, the seat tube thing has to reach further.
Crikey! What size frame is /that/? ;-)
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Dave Larrington - http://www.legslarry.beerdrinkers.co.uk/ World Domination? Just find a world that's into that kind of thing, then chain to the floor and walk up and down on it in high heels. (Mr. Sunshine)
