Today's Message Index:
----------------------
1. 12:11 AM - Re: Re: Prop speed reduction unit (PSRU) (Peter Harris)
2. 12:58 AM - Re: Re: Prop speed reduction unit (PSRU) (Peter and Jan Disher)
3. 02:08 AM - Re: Re: Prop speed reduction unit (PSRU) (Peter Harris)
4. 06:19 PM - Re: Jabiru 3300 on ebay (flyacub)
5. 07:12 PM - Re: Jabiru 3300 on ebay (promod69camaro)
Message 1
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| Subject: | Re: Prop speed reduction unit (PSRU) |
I think you can do better if you quit the Bing. I am part way into
installation of the Frensch TBI fuel injection and have got an extra 170RPM
static up to date.
Peter
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of jetboy
Sent: Sunday, 26 August 2007 3:12 PM
Subject: JabiruEngine-List: Re: Prop speed reduction unit (PSRU)
Shawn,
you have more or less answered your question, I would like to add
that the 3300 or 2200 for that matter is unlikely to last with a prsu
because you wont be able to cool it sufficiently. I understand a helicopter
company was using the 3300 but gave up after burning up 2 or 3.
The torsional vibrations to the crank will need addressing. Rotax dont just
bolt any old set of gears on the 912 and even their current setup doesn't do
that well. For a study on torsional vibration do a search using that term
and BD5 might yield a very good paper on the difficulties.
If it were me trying to do more with the unit I would be looking at mild
supercharging first.
Ralph
--------
Ralph - CH701 / 2200a
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=131030#131030
Message 2
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| Subject: | Re: Prop speed reduction unit (PSRU) |
Hi Peter ,
I'm also wanting to shaft the Bing at the moment in preference to the Sonex
Aero-Carb or the ellison.
I'm interested in what you have done in using this French TBI fuel
injection, It obviously runs a lot better.
Could you also give me there web site address. I'm very keen for an
alternative.
Many thanks,
Peter Disher
Australia
----- Original Message -----
From: "Peter Harris" <peterjfharris@bigpond.com>
Sent: Sunday, August 26, 2007 5:11 PM
Subject: RE: JabiruEngine-List: Re: Prop speed reduction unit (PSRU)
> <peterjfharris@bigpond.com>
>
> I think you can do better if you quit the Bing. I am part way into
> installation of the Frensch TBI fuel injection and have got an extra
> 170RPM
> static up to date.
> Peter
>
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of jetboy
> Sent: Sunday, 26 August 2007 3:12 PM
> To: jabiruengine-list@matronics.com
> Subject: JabiruEngine-List: Re: Prop speed reduction unit (PSRU)
>
>
> Shawn,
> you have more or less answered your question, I would like to
> add
> that the 3300 or 2200 for that matter is unlikely to last with a prsu
> because you wont be able to cool it sufficiently. I understand a
> helicopter
> company was using the 3300 but gave up after burning up 2 or 3.
>
> The torsional vibrations to the crank will need addressing. Rotax dont
> just
> bolt any old set of gears on the 912 and even their current setup doesn't
> do
> that well. For a study on torsional vibration do a search using that term
> and BD5 might yield a very good paper on the difficulties.
>
> If it were me trying to do more with the unit I would be looking at mild
> supercharging first.
>
> Ralph
>
> --------
> Ralph - CH701 / 2200a
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=131030#131030
>
>
> --
> 5:00 PM
>
>
Message 3
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| Subject: | Re: Prop speed reduction unit (PSRU) |
Peter,
I bought an Aerocarb and based on problems found by a hangar mate I decided
to check it on the bench first. Bad news _ the design is wrong, the throttle
cable is attached off centre and not even co planar with the slide. Any
attempt to move the throttle open quickly means an off centre load which
causes the slide to twist and jam. Worst case when attempting a go around .
My mate has to ram the throttle fully open for take off as any attempt to
open slowly causes it to jam .His is a J 4 cyl and the problem is worse with
the J3300. Suction at low throttle openings pulls the slide against the
frame and friction does the rest.
I attempted to discuss this with the CEO of Aerocarb and got attempts to
blame my installation followed by personal abuse and then was banned from
his Jabiru Engines list.
I think the Ellison is better designed but all slide type carbs are subject
to this kind of problem which is more pronounced with the larger engines. A
central attachment for the cable to the slide will help to overcome the
problem.
My TBI installation was pioneered by Helmut Frensch (Tailem Bend) He is a
retired development engineer for Mitsubishi.
Details with pictures were posted on the list where I am banned. (LOL)
I have sourced a suitable throttle body and at the present time I am
adjusting the fuel maps to suit.
I conducted extended experiments with the Bing and will be able to contrast
the results.So far I have gained 170RPM static.
Regards
Peter H Queensland.
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Peter and
Jan Disher
Sent: Sunday, 26 August 2007 5:58 PM
Subject: Re: JabiruEngine-List: Re: Prop speed reduction unit (PSRU)
<pjdisher@bigpond.com>
Hi Peter ,
I'm also wanting to shaft the Bing at the moment in preference to the Sonex
Aero-Carb or the ellison.
I'm interested in what you have done in using this French TBI fuel
injection, It obviously runs a lot better.
Could you also give me there web site address. I'm very keen for an
alternative.
Many thanks,
Peter Disher
Australia
----- Original Message -----
From: "Peter Harris" <peterjfharris@bigpond.com>
Sent: Sunday, August 26, 2007 5:11 PM
Subject: RE: JabiruEngine-List: Re: Prop speed reduction unit (PSRU)
> <peterjfharris@bigpond.com>
>
> I think you can do better if you quit the Bing. I am part way into
> installation of the Frensch TBI fuel injection and have got an extra
> 170RPM
> static up to date.
> Peter
>
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of jetboy
> Sent: Sunday, 26 August 2007 3:12 PM
> To: jabiruengine-list@matronics.com
> Subject: JabiruEngine-List: Re: Prop speed reduction unit (PSRU)
>
>
> Shawn,
> you have more or less answered your question, I would like to
> add
> that the 3300 or 2200 for that matter is unlikely to last with a prsu
> because you wont be able to cool it sufficiently. I understand a
> helicopter
> company was using the 3300 but gave up after burning up 2 or 3.
>
> The torsional vibrations to the crank will need addressing. Rotax dont
> just
> bolt any old set of gears on the 912 and even their current setup doesn't
> do
> that well. For a study on torsional vibration do a search using that term
> and BD5 might yield a very good paper on the difficulties.
>
> If it were me trying to do more with the unit I would be looking at mild
> supercharging first.
>
> Ralph
>
> --------
> Ralph - CH701 / 2200a
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=131030#131030
>
>
> --
> 5:00 PM
>
>
Message 4
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| Subject: | Re: Jabiru 3300 on ebay |
Hi
I think you will find that this engine is several years old. Make sure you get
the serial number and check it with the factory before you ante up any payment.
It has probably been sitting around for a long time and, although the owner says
it has been inhibited regularly, who knows what the level of expertise involved
was like.
FWIW
flyacub
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=131131#131131
Message 5
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| Subject: | Re: Jabiru 3300 on ebay |
Its a Jabiru 3300 serial number 207. It belongs to the only commercial and military
helicopter manufacturer in the southern hemisphere. They make un-manned
preditor helicopters, un-manned rescue helicopters, and are getting final approval
to manufacture commercial helicopters with full medical triage for rescue
like the life flight aircraft.
They were trying to use Jabiru engines in their design, but could not get them
to work the way they wanted. So they designed their own engine with a sister
company, now called the DeltaHawk, for use in their helicopters. The DeltaHawk
is a diesel, and has a very low consumption per hp, and operates at high altitudes.
It has a turbo charger and a super charger. They wanted to use diesel
because the navy wants aircraft that use jet fuel so they don't have to load
up on gasoline also. Trevor told me that they consider gasoline to be an explosive
hazard on a ship and want as little of it around as they can get by with.
I had him send me a picture of him, in the shop, with the engine holding a muffler.
He did so. I checked it against the media and it is him.
Man am I pumped. I asked if I could purchase another from him, but he said this
is the last one they have on hand that has not been modified or damaged. I
would have purchased 25 of them at that price.
He also told me that the engine loves to be fuel injected. They picked up right
at 10 hp with fuel injection alone. Then they mounted a 3,500 CFM belt driven
centrfugal fan with a plenum to the top of the motor. It pulled cooling air
threw the cooling fins for additional cooling capacity. They then installed
a turbo charger and cranked up the pressure a little. At the same RPM, the output
went to over 200 hp without any cooling problems. But it was not good enough
for the their helicopter, and the navy wanted a diesel. So they finally
gave up trying without using all the Jabiru engines they purchased.
Anyway, this purchase turned out to be very interesting.
I want to thank all on this group for their assistance. I would not have found
out all this neat information, if I had not listened to the group and insisted
on proof that the engine and seller do indeed exist.
Now I will be a regular to this site so I can keep up with development as they
occur.
Thanks again,
Shawn
--------
Sport Pilot (almost) - Waiting for good weather to take flight exam.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=131141#131141
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