Bugger it!

Jon Senior

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.

Jon

Jon Senior

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.

garryb59

>
>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.

Good luck with the 'fix'.

Garry

Tony Raven

garryb59 wrote:
>
> 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.

Tony

Simon Brooke

in message <1103582600.17700.0@echo.uk.clara.net>, Jon Senior
<jon_AT_restlesslemon_DOT_co_DOT_uk> ('') wrote:

> 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.

--
simon@jasmine.org.uk (Simon Brooke) http://www.jasmine.org.uk/~simon/

Due to financial constraints, the light at the end of the tunnel
has been switched off.

Dave Larrington

Jon Senior wrote:
> 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!

--

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)

David Martin

On 21/12/04 10:17 am, in article 32qdb9F3nq5v7U1@individual.net, "Dave
Larrington" <smert.spamionam@privacy.net> wrote:

> Jon Senior wrote:
>> 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!

Will that also work for reaming seat tubes with the appropriate cutting bit?

...d

Andy Morris

David Martin wrote:
> On 21/12/04 10:17 am, in article 32qdb9F3nq5v7U1@individual.net, "Dave
> Larrington" <smert.spamionam@privacy.net> wrote:
>
>> Jon Senior wrote:
>>> 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] :-)
>>
>
> Will that also work for reaming seat tubes with the appropriate
> cutting bit?
>

Not unless they've changed a lot.

Head tube dodad

http://www.parktool.com/tools/HTR_1.shtml

Seat tube reamer

http://www.fisheroutdoor.co.uk/prod...umb/TL06661.jpg

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).


--
Andy Morris

AndyAtJinkasDotFreeserve.Co.UK


Love this:
Put an end to Outlook Express's messy quotes
http://home.in.tum.de/~jain/software/oe-quotefix/

Dave Larrington

Andy Morris wrote:

> 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/? ;-)

--

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)