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From: "Richard Sohn" <unicorn@gdsys.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1926970@logan.com>
Subject: Re: [FlyRotary] Re: Jet-A
Date: Sun, 18 Mar 2007 11:54:34 -0600
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----- Original Message ----- 
From: "Charlie England" <ceengland@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, March 17, 2007 7:33 PM
Subject: [FlyRotary] Re: Jet-A


> WRJJRS@aol.com wrote:
>> In a message dated 3/12/2007 4:24:30 PM Pacific Standard Time, 
>> rotary.thjakits@gmail.com writes:
>>
>>     Well, then you should get the newest of the new - emissions and all!!
>>      Thomas
>>
>> Thomas,
>>  Many of the German cars are now meeting high emission control levels. 
>> They were late to the table emissions wise but have hit it with a 
>> vengence. I heard that in the Ruhr valley that they were forcing 
>> alternate day use the smog was so bad. (even plates on even days, odd 
>> plates, odd days) I don't know about current levels. The Audis were first 
>> to use the Siemens system, they are a bit more adventurous than Merc. I 
>> believe D-B is developing their own system in cooperation with Bosch. The 
>> Siemens injectors are piezo driven and have a phenomonal response time. 
>> They also can run with lower lubricity gasoline. I believe several 
>> Japanese cars also use the system under license. The thing is you need 
>> the injectors, the pump, (a new lightweight pump BTW), the plumbing and a 
>> control signal. I think Tracys unit will be able to drive these 
>> injectors! For emissons the profiles are very carefully developed. We 
>> won't need anything near that close, not needing to meet those standards.
>> Bill Jepson
>
>
>
> Just stumbled across this site; Is this the pump for the Siemens 
> injection?
>
>> http://contrails.free.fr/engine_bosch_ve_en.php
>
>
> Charlie
>
This pump looks like the last pump Bosch used before going common rail, 
which was some years ago.
On commom rail system, we have to keep in mind the fact of very high fuel 
pressure, up to 21000psi !!.
This is the pressure in the fuel rail, very high, compared to up 3000psi 
injection pressure on mechanical diesel pump.
There is certainly not much room for experimenting, i would think.
FWIW.

Richard Sohn
N2071U
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