Transmission Ratio - calculating

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On Fri, 30 Jul 2004 17:42:57 +0000 (UTC), "Alan Brown"
<[email protected]> wrote:

>I remember this one. The engine, although originally designed for the
>Spitfire, was actually out of an Air Sea Rescue launch.


Yes it was a merlin (or derivative) and I think you are right about
its origin, still it would have given barely 1000hp without its
supercharger!

AJH
 



"Tim Hobbs" <[email protected]> wrote in message news:[email protected]...
> On Fri, 30 Jul 2004 11:30:29 +0100, Mother <"@ {mother} @"@101fc.net>
> wrote:
>
> >On Thu, 29 Jul 2004 15:03:06 +0100, Tim Hobbs
> ><[email protected]> wrote:
> >
> >>You have mail. A spreadsheet that calculates road speed for given RPM
> >>and gear ratios.

> >
> >Top notch - many thanks!
> >
> >I've modded it for a 101 (with credit) and placed it here in case
> >anyone wants to play:
> >
> >http://www.101fc.net/files/gearratios.xls

>
> A big improvement I'd say!
>
>
>
> --
>
> Tim Hobbs
>

I put some numbers in and found if I fit 33 inch tyres
autobox with transfer box and then fit 3.5 diffs
I can get an increase of about 160% over a standard SWB
I assume the body and chassis will disintergrate before I get
to that speed 185mph definately brown trouser speed

Andy


--
SWB Series 2a ( dressed as a 3) "Bruce"
It's big it's mean it's really really green


 
On Friday, in article
<[email protected]>
[email protected] wrote:

> On Fri, 30 Jul 2004 17:42:57 +0000 (UTC), "Alan Brown"
> <[email protected]> wrote:
>
> >I remember this one. The engine, although originally designed for the
> >Spitfire, was actually out of an Air Sea Rescue launch.

>
> Yes it was a merlin (or derivative) and I think you are right about
> its origin, still it would have given barely 1000hp without its
> supercharger!


It's also worth remembering that the Meteor tank engine was a Merlin
derivative, and RR swapped the tenk engine business for jet engines.

If I recall it right, Rover was the other party to the deal.

Presumably this makes a Meteor-engined Land Rover ARC-qualified?

--
David G. Bell -- SF Fan, Filker, and Punslinger.

"History shows that the Singularity started when Sir Tim Berners-Lee
was bitten by a radioactive spider."
 
In <[email protected]> Austin Shackles wrote:
> If you want to hunt an LT230-type setup, you're looking at an ex-disco
> one. I suspect the BW transfer box arrived at the same time as the ZF
> in the RRs, although I'm open to correction on that.


Yep, you're right, it does need correcting :)

There were some classic RR fitted with the LT230. The BW Xfre box wasn't
fitted until the 1989 model year. The ZF was fitted from 1986.

cheers

Dave W.
http://www.yorkshireoffroadclub.net/
 
In <[email protected]> Mother wrote:

> Initially - as this is an experiment and I want to limit my financial
> exposure, I'm going to go get a s/h box - if this works out alright,
> I'll put an Ashcroft box in next year. Otherwise it'll be back to the
> LT95... Hmm...


Oh, and another thing :) I guess for the 101 you'll be creating your
own transfer box lever (a lot easier with the Borg Warner BTW !). But if
you are thinking of utilising an LT230 lever assembly make sure you get
the mounting plate for the auto box.

On some manual boxes the xfer lever bolts onto the top of the gearbox
directly. On a ZF you need a mounting plate and these cost around 60
quid new so best to get one with the ZF if you can.

cheers

Dave W.
http://www.yorkshireoffroadclub.net/
 
<[email protected]> wrote in message
news:[email protected]...
> On Fri, 30 Jul 2004 11:28:07 +0100, Mother <"@ {mother} @"@101fc.net>
> wrote:
>
> >
> >BTW, the wheels are 38.5 (not 28.5 - that was my typo). I was using
> >the 70mph @ 1,500 RPM as a demonstration - not what I'd get - as
> >that'd be very scary! :)

>
> Do you remember that Rolls Royce engined special that RR cars insisted
> not be called a RR or have a flying lady, built by someone called
> Dodd?
>
> Geared at 100mph per 1000rpm and rev limited at 2900rpm!
>
> AJH
>


I remember, from years and years ago, reading about a guy who had installed
a Spitfire engine into his car (the V-12 aeroplane Spitfire, not the piffly
little Triumph 1500cc Briggs & Stratton affair) - had to use a lorry clutch
as I recall, but it was good for about mach 17 at 2200 rpm apparently.
Possibly the car you're referring to? It might have been one of those
drag-racers now I think about it.

Hmmm. I wonder if I could squeeze the engine from one of Her Majesty's
warships into my S-IIa....... ;)

Steve


 
On Friday, in article
<[email protected]>
[email protected] wrote:

> On Fri, 30 Jul 2004 17:42:57 +0000 (UTC), "Alan Brown"
> <[email protected]> wrote:
>
> >I remember this one. The engine, although originally designed for the
> >Spitfire, was actually out of an Air Sea Rescue launch.

>
> Yes it was a merlin (or derivative) and I think you are right about
> its origin, still it would have given barely 1000hp without its
> supercharger!


It's also worth remembering that the Meteor tank engine was a Merlin
derivative, and RR swapped the tenk engine business for jet engines.

If I recall it right, Rover was the other party to the deal.

Presumably this makes a Meteor-engined Land Rover ARC-qualified?

--
David G. Bell -- SF Fan, Filker, and Punslinger.

"History shows that the Singularity started when Sir Tim Berners-Lee
was bitten by a radioactive spider."
 
On Fri, 30 Jul 2004 11:30:29 +0100, Mother <"@ {mother} @"@101fc.net>
wrote:

>On Thu, 29 Jul 2004 15:03:06 +0100, Tim Hobbs
><[email protected]> wrote:
>
>>You have mail. A spreadsheet that calculates road speed for given RPM
>>and gear ratios.

>
>Top notch - many thanks!
>
>I've modded it for a 101 (with credit) and placed it here in case
>anyone wants to play:
>
>http://www.101fc.net/files/gearratios.xls


A big improvement I'd say!



--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'95 Discovery V8i aka "The Disco" (FOR SALE)
'03 Volvo V70

My Landies? http://www.seriesii.co.uk
Barcoding? http://www.bartec-systems.com
Tony Luckwill web archive at http://www.luckwill.com
 
In <[email protected]> Austin Shackles wrote:
> If you want to hunt an LT230-type setup, you're looking at an ex-disco
> one. I suspect the BW transfer box arrived at the same time as the ZF
> in the RRs, although I'm open to correction on that.


Yep, you're right, it does need correcting :)

There were some classic RR fitted with the LT230. The BW Xfre box wasn't
fitted until the 1989 model year. The ZF was fitted from 1986.

cheers

Dave W.
http://www.yorkshireoffroadclub.net/
 
On Fri, 30 Jul 2004 15:27:57 +0000 (UTC), Dave White
<[email protected]> wrote:

>In <[email protected]> Mother wrote:
>> On Thu, 29 Jul 2004 12:59:51 +0100, I wrote:
>> Now... Cross drilled input gears anyone? I'll assume that later
>> boxes will already have them - when were they added?

>
>I'm not certain this is an issue with the ZF, I've never known anyone
>have a problem... certainly haven't done anything to any of mine.


Smashing answer - feel a bit better now :)

>> Also, what's the score with the hanging in 1st gear problem associated
>> with these boxes? Again, would a later box have overcome this?

>
>This is a problem with all the ZF boxes and is usually caused by the O
>rings inside the governor housing. They are easy to replace/inspect with
>the transfer box removed. Sometimes the governor itself gets scored and
>cuts the O rings in which case a new governor will set you back about 30
>quid. It takes about 10 minutes to fix once the xfer box is off.


So it's probably worth doing this anyway, whilst out of the vehicle?

>> Initially - as this is an experiment and I want to limit my financial
>> exposure, I'm going to go get a s/h box - if this works out alright,
>> I'll put an Ashcroft box in next year. Otherwise it'll be back to the
>> LT95... Hmm...

>
>Check the oil colour in the box - a nice clear pink and all is well (
>probably), a brown colour could mean trouble. If there is no oil in it
>then pull the sump plug out and take a look. Brown sludge or lots of
>metal on the magnet (built in to the plug) could mean trouble.


Good idea. I'll mention this to Warren when he goes looking. I'll be
flushing and refilling anyway but a neb before buying is a very good
idea.

>While I remember, if you get the ZF and the xfer box seperately, make
>sure that you can get hold of a suitable output shaft. The ZF to BW
>output shaft splines stop about half way down the shaft. The LT230 needs
>full length splines.... Discos and early 4 speed classic RR were factory
>fitted with LT230s.


Ah, yes - came upon this somewhere else. I'm going to try and get a
complete gear and transfer box out of a Disco or Rangie (did they both
have the same transfer ratio?).

>> Finally, Charlotte and I both - at the same time - last night
>> mentioned to each other that we'd never (ever) driven an Automatic!

>
>Go on, you know you want to :)


Just have - albeit not very far. I can see two things happening;

1. My left foot will kick through the front of Grumble until I'm used
to not having a clutch.

2. My left leg will lose weight and wither away once I get used to
not having a clutch.

:)



--
Some Land Roveresque (101 biased), links available
from: http://links.solis.co.uk/Geek/X4_Land_Rover/
I also have a little Land Rover site biased toward
my beloved 101 "Grumble", at: http://www.101fc.net


Reading this in 'alt.fan.landrover'? Did you know
there's a group FAQ: http://www.aflfaq.dyndns.info
 
I remember this one. The engine, although originally designed for the
Spitfire, was actually out of an Air Sea Rescue launch. The owner was an
insurance broker. The whole issue came to light when a polite letter was
received by Rolls Royce asking that they not road test their new models on
the German autobahn as the high speeds were causing the traffic monitoring
equipment (some sort of measure of density I think) to fail

Alan


> Do you remember that Rolls Royce engined special that RR cars insisted
> not be called a RR or have a flying lady, built by someone called
> Dodd?
>
> Geared at 100mph per 1000rpm and rev limited at 2900rpm!
>
> AJH
>



 



"Tim Hobbs" <[email protected]> wrote in message news:[email protected]...
> On Fri, 30 Jul 2004 11:30:29 +0100, Mother <"@ {mother} @"@101fc.net>
> wrote:
>
> >On Thu, 29 Jul 2004 15:03:06 +0100, Tim Hobbs
> ><[email protected]> wrote:
> >
> >>You have mail. A spreadsheet that calculates road speed for given RPM
> >>and gear ratios.

> >
> >Top notch - many thanks!
> >
> >I've modded it for a 101 (with credit) and placed it here in case
> >anyone wants to play:
> >
> >http://www.101fc.net/files/gearratios.xls

>
> A big improvement I'd say!
>
>
>
> --
>
> Tim Hobbs
>

I put some numbers in and found if I fit 33 inch tyres
autobox with transfer box and then fit 3.5 diffs
I can get an increase of about 160% over a standard SWB
I assume the body and chassis will disintergrate before I get
to that speed 185mph definately brown trouser speed

Andy


--
SWB Series 2a ( dressed as a 3) "Bruce"
It's big it's mean it's really really green


 
On Fri, 30 Jul 2004 17:42:57 +0000 (UTC), "Alan Brown"
<[email protected]> wrote:

>I remember this one. The engine, although originally designed for the
>Spitfire, was actually out of an Air Sea Rescue launch.


Yes it was a merlin (or derivative) and I think you are right about
its origin, still it would have given barely 1000hp without its
supercharger!

AJH
 
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