converting Froude FO209 water brake  

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(@mach_1)
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  • I tried to find our more specification  on the " Group C XJ220 Jaguar "  V6 jag twin turbo engine. Mainly the torque/RPM range they operated in from light throttle to wide open throttle (WOT) ? to see how the engine and f209 worked injunction  with each other!
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Posted : 07/01/2020 12:03 am
 Udo
(@udo)
Member

For my understanding and expiriance the full barke power is in the range from 7000-16000rpm

I can easy brake 1000NM at 5000RPM

There is a valve on inlet side but that look like an simple openining valve to me.

In the manjual only the oultlet valve was describted

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Posted : 07/01/2020 3:32 pm
(@mach_1)
Member

Ok , does the f209 factory manual  have a torque power graph curve in it ?

What is the water supply requirement for the f209 ?  volume and pressure  ?

Newton-meters to Foot-pounds formula

ft-lb = Nm X 0.73756

And vice versa is

Foot-pounds to Newton-meters formula

Nm = ft-lb / 0.73756

1000Nm = 737.56 ftlb

I'm  a foot pound (ftlb) person , what is the maximum torque the f209 can absorb ?

 

Maybe Torque Nm (lb.ft) = 1,270 (940) ???

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Posted : 07/01/2020 8:12 pm
(@mach_1)
Member

Udo , if or/and when you dismantle the outlet valve assembly can you take some pictures and post them please.  Or do you already know and can describe the shape and size of the outlet valve ? Thankyou. 

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Posted : 07/01/2020 8:23 pm
(@mach_1)
Member

I  know in your first introduction post you gave a vague discription of the outlet valve!

Here I need your help, how can I calculate the force that needed to operate the throttel blade style valve 

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Posted : 07/01/2020 8:30 pm
 Udo
(@udo)
Member

I do not dimalting the outlet valve it is good working and never touch a running system 😉

In the maual no details about brake power/rpm but what is more poroblem to me is thet my dyno comes with the EH70D controll system from factory and so there is no description for calibration. I the text there was noted for calibraton see chatpterX.x.xx but there is missing in my manual. So I hve no picture of the calibration arm. It will be very helpfull when I get dimensions of the calibration arm ore the brake housing to build a own

This post was modified 2 weeks ago 2 times by Udo
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Posted : 12/01/2020 10:20 am
(@mach_1)
Member

Hi Udo , thank you for those pictures. What strain gauge/load cell/pressure sensor does the f209 dyno have coupled to the stator housing body of the dyno absorber to its chassis housing originally  from froude consine ?  Is it visible OR hidden under covers ?

Thats a very interesting drawing of tbe water outlet butterfly valve shape.

I tried to make out heads&tails out of the graphs you posted but i was perplexing way to much about them cause the ( x , y ) plains aint 100% clear.

As far as you don't have a calibration arm and weights,  i'm supprised they obviously were not passed onto you when you purchased the dyno. 

Don't even think about buying it from froude the calibration arm and certified weights will cost you a fortune.

Just find a suitable spot on the stator housing  around the shaft flange bearing area should be threaded  holes around the circumstances and fabricate a calibration arm and some weights of known value the centre of the dyno shaft is you zero referrance datum fulcrum point.

Make the arm as long as you want knowing the precise length of it.

What strain gauge/load cell are you planning to attach to the f209 dyno ?

Keep the informatin updates & pictures coming. Would like more of the pics of the dyno. Thanks

 

Does you workshop manual have any data about calibration details of the dyno ?

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Posted : 19/01/2020 1:47 am
 Udo
(@udo)
Member

there was no instructions in manual beacuse the notice with the electronic steering unit it was not nessesary i twas calibrated from factory.

I have build my own calibration arm and build a conterweigt that I moutnt on opposide side to neutralising the weight of the arm.

I have accses th calibrated weights when I got them I can calculate the length of the arm. The instrument for tork is still working only the controll of the valve is defect.

 

This post was modified 1 week ago by Udo
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Posted : 19/01/2020 7:10 pm
(@mach_1)
Member

Hi Udo, Are you going to be re_using the F209 genuine  BLH C3P1 1000lb compression canister Load Cell you posted the picture of?  

I have build my own calibration arm and build a conterweigt that I moutnt on opposide side to neutralising the weight of the arm

 You can zero out the arm in the load cell setup when setting up the calibration in the software.

In the picture you posted of the load cell mounting  points, those three holes in the top load cell mounting bracket to the stator housing are ideal for a calibration arm location to affix and remove.

I see you asked a question on another post about the original reluctor speed sensor on your F209 dyno .  What electronics are you going to use to  converting an analogue sine wave signal to a digital square wave signal ?

Thanks.

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Posted : 20/01/2020 2:43 am
 Udo
(@udo)
Member

They have lot usefull converters

 

https://www.zmm-electronic.de/index.php?language=en&MODsid=7c8afea488f22998c7b951c04a48aaf5

 

yes I will use the orginal load cell that is still mounted

This post was modified 1 week ago by Udo
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Posted : 20/01/2020 7:21 pm
 Udo
(@udo)
Member

So far now

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Posted : 22/01/2020 9:33 pm
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