land-speed
[Top] [All Lists]

Re: compounding

To: "LSR List" <land-speed@autox.team.net>
Subject: Re: compounding
From: "Mike Jenkins" <MikeJ@speedrecordclub.softnet.co.uk>
Date: Wed, 11 Oct 2000 19:04:29 +0100
Keith,

The IC engine still drives the rear wheels (or whatever else you want to
drive), the turbine is there to use some of the energy in the exhaust gases
that would otherwise be wasted. The turbine is connected to the crank by a
variable speed grear system to allow it to run at or near its optimum speed
at all times.

There were a number of productin US aero-engines using the system and some
development engines in the UK (these never made production due to a
government decision to put all future development into gas turbines despite
the compound engines showing a far better fuel economy than the GTs
especially in the marine field).

Mike Jenkins
----- Original Message -----
From: Keith Turk <kturk@ala.net>
To: Richard Fox <v4gr@rcn.com>; John Beckett <landspeedracer@email.msn.com>;
Mike Jenkins <MikeJ@speedrecordclub.softnet.co.uk>; LSR List
<land-speed@autox.team.net>
Sent: Wednesday, October 11, 2000 12:30 AM
Subject: Re: compounding


> Wow... interesting Concept.... So what we are saying basically in relation
> to the Turbine.. is the Internal combustion engine is supplying the Power
to
> the Turbine.. and it makes enough Pressure to allow a Turbine to drive the
> car....
>
> I have never even heard of the Concept.... I wonder what the actual rear
> wheel Hp would be in relation to letting the IC engine drive the rear
> wheels.. is this a Proven enity? I mean has someone actually done this and
> Made any serious gains?
>
> Okay..... where are our Rear Wheel steer and Weed eater guys when you need
> them....
>
> K
> ----- Original Message -----
> From: "Richard Fox" <v4gr@rcn.com>
> To: "John Beckett" <landspeedracer@email.msn.com>; "Mike Jenkins"
> <MikeJ@speedrecordclub.softnet.co.uk>; "LSR List"
> <land-speed@autox.team.net>
> Sent: Tuesday, October 10, 2000 6:31 PM
> Subject: Re: compounding
>
>
> > John; Turbo compounding in this case means having a turbine in the
exhaust
> > system that is geared to the crank shaft. The exhaust pressure is used
to
> > develop force to the crankshaft instead of driving the supercharger. In
> the
> > late 40s it was thought the engine would just serve as a gas generator
and
> > the turbine would drive the prop. Than they realized that a compressor
was
> a
> > better gas generator than a piston engine. In 66 they closed the piston
> > engine shop where I worked and I moved to the Jet Shop. Rich Fox
> > -----Original Message-----
> > From: John Beckett <landspeedracer@email.msn.com>
> > To: Richard Fox <v4gr@rcn.com>; Mike Jenkins
> > <MikeJ@speedrecordclub.softnet.co.uk>; LSR List
> <land-speed@autox.team.net>
> > Date: Tuesday, October 10, 2000 02:26 PM
> > Subject: compounding
> >
> >
> > >I'm definitely missing something here. I was thinking that turbo
> > compounding
> > >was using two or more turbos to forces more air in the engine. Thought
> the
> > >F-1 cars did this in the 80's.
> > >
> > >John Beckett
> > >----- Original Message -----
> > >From: "Richard Fox" <v4gr@rcn.com>
> > >To: "Mike Jenkins" <MikeJ@speedrecordclub.softnet.co.uk>; "LSR List"
> > ><land-speed@autox.team.net>
> > >Sent: Tuesday, October 10, 2000 4:41 PM
> > >Subject: Re: cooling
> > >
> > >
> > >> Dan Warriner; This sounds good. What do you think the board will say?
> > Rich
> > >> PS will this be legal in Vintage categories?
> > >> -----Original Message-----
> > >> From: Mike Jenkins <MikeJ@speedrecordclub.softnet.co.uk>
> > >> To: LSR List <land-speed@autox.team.net>
> > >> Date: Tuesday, October 10, 2000 12:59 PM
> > >> Subject: Re: cooling
> > >>
> > >>
> > >> >Hmm, a turbo-compound LSR vehicle! Don't think I've ever heard of
one
> > >being
> > >> >mooted before. Would it run as blown or as a turbine, or both? The
> only
> > >> >proposed motor sport application that I've ever heard of was back in
> the
> > >> mid
> > >> >'80s when AustinRover were considering developing one for their
Metro
> > 6R4
> > >> >Rally car for its Group 'S' life but the class was banned before it
> > >began.
> > >> >
> > >> >There was a development programme in the '50s on a marine
> turbo-compound
> > >> >engine over here in Britain based on the Napier Deltic engine. Not
> only
> > >did
> > >> >it almost double the power output of the engine but it also had a
> system
> > >of
> > >> >'afterburning' for short-periods where very high power was required.
> > This
> > >> >worked by squirting more fuel and air into the exhaust system
upstream
> > of
> > >> >the turbine, and gave an almost unbelievable increase in power -
from
> > >> memory
> > >> >it was another 60 or 70 percent! Now that would be difficult to
> > legislate
> > >> >for in the rules!!
> > >> >
> > >> >Mike Jenkins
> > >> >
> > >> >----- Original Message -----
> > >> >From: Richard Fox <v4gr@rcn.com>
> > >> >To: Joe Amo <jkamo@rapidnet.com>
> > >> >Cc: <land-speed@autox.team.net>
> > >> >Sent: Tuesday, October 10, 2000 3:52 PM
> > >> >Subject: Re: cooling
> > >> >
> > >> >
> > >> >> Joe; well that's a concern, although I have worked on lots of twin
> > >> >ignition
> > >> >> engines of large size with plugs on opposite sides of cylinders.
> Even
> > >> >flown
> > >> >> long distances over water using such a system. I also liked the
> > >> >> Turbo-compound feature of the 3350 Wright Cyclone. Dan is that
> legal?.
> > >> >Rich
> > >> >> Fox
> > >> >> -----Original Message-----
> > >> >> From: Joe Amo <jkamo@rapidnet.com>
> > >> >> To: Richard Fox <v4gr@rcn.com>
> > >> >> Cc: land-speed@autox.team.net <land-speed@autox.team.net>
> > >> >> Date: Monday, October 09, 2000 08:57 PM
> > >> >> Subject: Re: cooling
> > >> >>
> > >> >>
> > >> >> >Are you     trying to create detonation      ?      Just curious,
> > >sounds
> > >> >> >dangerous to me
> > >> >> >Joe ( I can show you how to bend rods) Amo :)
> > >> >> >
> > >> >> >Richard Fox wrote:
> > >> >> >
> > >> >> >> I have been trying to send this for awhile, maybe it will work
> this
> > >> >time.
> > >> >> >> I'm making chips doing a billet aluminum head for my 32
Plymouth.
> > >> >> Converting
> > >> >> >> back to "L" head. I plan no water jacket mostly because its
> easier
> > >> that
> > >> >> way.
> > >> >> >> My thought is there is no exhaust passage in the head and it
will
> > >have
> > >> >16
> > >> >> >> fins 1/8 thick by 3/4 tall with 3/8 gaps between them. Any
input
> on
> > >> >this
> > >> >> >> plan, informed or otherwise, is encouraged. Also I will be
using
> > two
> > >> 10
> > >> >> mm
> > >> >> >> sparkplugs one in the normal place next to the exhaust valve
and
> > one
> > >> >over
> > >> >> >> the bore. Thought it would be interesting to vary the timing
> > between
> > >> >them
> > >> >> to
> > >> >> >> see what happens. I am sure all of this was done 50 years ago
but
> > it
> > >> >> keeps
> > >> >> >> me busy.  Rich Fox
> > >> >> >> -----Original MessageCc: land-speed@autox.team.net
> > >> >> >> <land-speed@autox.team.net>
> > >> >> >> Date: Monday, October 09, 2000 05:18 AM
> > >> >> >> Subject: Re: cooling
> > >> >> >>
> > >> >> >> >I don't often weigh in on the tech stuff, but we had Ed Pink
> give
> > >us
> > >> >> some
> > >> >> >> >input to this cooling deal. Ed states that  you can't have too
> > much
> > >> >> water,
> > >> >> >> >all nooks and cranies must be filled to avoid any chance of
hot
> > >spots
> > >> >> which
> > >> >> >> >can lead to detonation. We currently use two 12 volt pumps at
> the
> > >> >water
> > >> >> >> >tank. The ouput of these pumps feed into a sprint car
> centrifugal
> > >> pump
> > >> >> >> >driven off the crank. There is a thermostat in the line also
to
> > aid
> > >> in
> > >> >> >> >keeping the temp constant.
> > >> >> >> >
> > >> >> >> >Dan (real cool) Warner
> > >> >> >> >
> > >> >> >> >----- Original Message -----
> > >> >> >> >From: John Beckett <landspeedracer@email.msn.com>
> > >> >> >> >To: Keith Turk <kturk@ala.net>; Land Speed List
> > >> >> <land-speed@autox.team.net>
> > >> >> >> >Sent: Friday, October 06, 2000 3:13 PM
> > >> >> >> >Subject: Re: cooling
> > >> >> >> >
> > >> >> >> >
> > >> >> >> >> Now here is an interesting bit of info: A good standard
water
> > >pump
> > >> >> flows
> > >> >> >> >> about 100 gpm, a NASCAR pump flows 180 gpm. The best
electric
> > >pump
> > >> I
> > >> >> have
> > >> >> >> >> found flows only about 30 gpm.
> > >> >> >> >> So now if your flow starts off at thirty gpm it ain't gonna
be
> > >> >> anywhere
> > >> >> >> >near
> > >> >> >> >> close to the 35 gpm needed at the exit point.
> > >> >> >> >>
> > >> >> >> >> John Beckett, LSR #79,
> > >> >> >> >> ----- Original Message -----
> > >> >> >> >> From: "Keith Turk" <kturk@ala.net>
> > >> >> >> >> To: "John Beckett" <landspeedracer@email.msn.com>; "Land
Speed
> > >> List"
> > >> >> >> >> <land-speed@autox.team.net>
> > >> >> >> >> Sent: Friday, October 06, 2000 9:12 AM
> > >> >> >> >> Subject: Re: cooling
> > >> >> >> >>
> > >> >> >> >>
> > >> >> >> >> > On your Recommendation I spent an hour on the phone
> yesterday
> > >> with
> > >> >> Carl
> > >> >> >> >> > Adams... of Adams Pumps..
> > >> >> >> >> >
> > >> >> >> >> > Carl is a LSR fan... and a Nascar Cooling specialist... it
> was
> > >a
> > >> >> >> >> fascinating
> > >> >> >> >> > conversation and I look forward to hanging out with him on
> the
> > >> >> 28th....
> > >> >> >> >> >
> > >> >> >> >> > He was saying what we needed was a Minimum of 35 gallons
of
> > >Flow
> > >> >per
> > >> >> >> >> Minute
> > >> >> >> >> > and that the Water Must in fact Flow through all the
Block..
> > >not
> > >> >> just
> > >> >> >> >the
> > >> >> >> >> > Front... Back cylinders are often stagnant....  He was a
BIG
> > >FAN
> > >> >of
> > >> >> >> >> > Thermostats.... saying they need to be VERY HIGH.... like
> 190
> > >or
> > >> >> so....
> > >> >> >> >he
> > >> >> >> >> > wanted the Water Temp to be in the 210 range to Make
> Power...
> > >> >saying
> > >> >> >> >there
> > >> >> >> >> > was 80hp difference in one of his applications between 160
> and
> > >> 210
> > >> >> >> >> > degrees...
> > >> >> >> >> >
> > >> >> >> >> > His other Big Comment was that the Pump needed to be
> Measured
> > >not
> > >> >at
> > >> >> >> the
> > >> >> >> >> > Pump but through the Block.... at the outlet.... anything
> else
> > >is
> > >> >> just
> > >> >> >> >> > guessing at what the actual flow through the restrictions
> > >really
> > >> >> is...
> > >> >> >> >> >
> > >> >> >> >> > I can't remember all the conversation but like you John...
I
> > >was
> > >> >> very
> > >> >> >> >> > impressed with the guys knowledge of Cooling.
> > >> >> >> >> >
> > >> >> >> >> > Keith
> > >> >> >> >> > ----- Original Message -----
> > >> >> >> >> > From: "John Beckett" <landspeedracer@email.msn.com>
> > >> >> >> >> > To: "Land Speed List" <land-speed@autox.team.net>
> > >> >> >> >> > Sent: Friday, October 06, 2000 8:14 AM
> > >> >> >> >> > Subject: cooling
> > >> >> >> >> >
> > >> >> >> >> >
> > >> >> >> >> > > OK, thought I would give Keith a break and start a new
> > >thread.
> > >> >> >> >> > >
> > >> >> >> >> > > My big question is how important is the cooling system
to
> > HP?
> > >> >and
> > >> >> >> >> > longevity?
> > >> >> >> >> > >
> > >> >> >> >> > > Have had several problems with melted pistons over the
> > years.
> > >> >And
> > >> >> I
> > >> >> >> >> > thought
> > >> >> >> >> > > they were due to none cooling related problems (probably
> > >were).
> > >> >> But
> > >> >> >> >now
> > >> >> >> >> I
> > >> >> >> >> > > wonder if the cooling system was of a better design
> whether
> > >the
> > >> >> >> >pistons
> > >> >> >> >> > > would have ultimately melted (or at least melted as
> > quickly).
> > >> >> >> >> > >
> > >> >> >> >> > > So (on a SB Chevy) how much water flow (gpm) is required
> for
> > >> >> proper
> > >> >> >> >> > cooling?
> > >> >> >> >> > > Can you have to much flow?
> > >> >> >> >> > >
> > >> >> >> >> > > What's the preferred pump: belt driven or electric? How
> much
> > >HP
> > >> >> does
> > >> >> >> a
> > >> >> >> >> > belt
> > >> >> >> >> > > driven pump use vs. an alternator to drive all the
> > electrical
> > >> >> >> >> accessories.
> > >> >> >> >> > >
> > >> >> >> >> > > Should you run a thermostat? and at what temp? or just a
> > >> >> restrictor?
> > >> >> >> >> > >
> > >> >> >> >> > > Is it better to design a LSR cooling system based on
Drag
> > >> Racing
> > >> >> or
> > >> >> >> >> > NASCAR?
> > >> >> >> >> > >
> > >> >> >> >> > > What's up with reverse flow systems? don't see many in
> grass
> > >> >roots
> > >> >> >> >> racing.
> > >> >> >> >> > >
> > >> >> >> >> > > John Beckett
> > >> >> >> >> > >
> > >> >> >> >> > >
> > >> >> >> >> > >
> > >> >> >> >> > >
> > >> >> >> >> > >
> > >> >> >> >> > >
> > >> >> >> >> > >
> > >> >> >> >> >
> > >> >> >> >>
> > >> >> >> >>
> > >> >> >> >>
> > >> >> >> >
> > >> >> >> >
> > >> >> >
> > >> >> >
> > >> >> >
> > >> >>
> > >> >>
> > >> >
> > >>
> > >
> > >
> > >
> >
> >
>
>


<Prev in Thread] Current Thread [Next in Thread>