I had thought I was the only one with sleepless nights.
Bud
----- Original Message -----
From: ptag.dev@tiscali.co.uk<mailto:ptag.dev@tiscali.co.uk>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Friday, April 15, 2011 11:51 AM
Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE
DURING TAXI
"ptag.dev@tiscali.co.uk<mailto:ptag.dev@tiscali.co.uk>"
<ptag.dev@tiscali.co.uk<mailto:ptag.dev@tiscali.co.uk>>
Hi! Frans, Graham /all
With comments about the Jabiru you are subjecting me to a nightmare
!!!!!!!!!!!! don't tempt me !
Regards
Bob Harrison G_PTAG
>----Original Message----
>From:
grahamsingleton@btinternet.com<mailto:grahamsingleton@btinternet.com>
>Date: 15/04/2011 11:46
>To: <europa-list@matronics.com<mailto:europa-list@matronics.com>>
>Subj: Re: Europa-List: Re: JABIRU 3300 BRAND
NEW OVER TEMPERATURE DURING TAXI
>
>Frans
>I think you are right, much more logical conclusions than mine !:-)
>Agree about the Jabiru also, sad but geared and liquid cooled will
always have a
>performance advantage. More complication too of course but a more
sensible
>compromise I think.
>regards
>Graham
>
>
>
>
>________________________________
>From: Frans Veldman
<frans@privatepilots.nl<mailto:frans@privatepilots.nl>>
>To: europa-list@matronics.com<mailto:europa-list@matronics.com>
>Sent: Friday, 15 April, 2011 11:17:12
>Subject: Re: Europa-List: Re: JABIRU 3300 BRAND NEW OVER TEMPERATURE
DURING
>TAXI
>
<frans@privatepilots<mailto:frans@privatepilots>.
nl>
>
>On 04/15/2011 10:17 AM, GRAHAM SINGLETON wrote:
>
>> To a certain extent the same thing happens with Rotax so the front
>> cylinders get more fuel than the rear at some throttle settings,
drops
>> of fuel don't turn corners the same as air molecules!
>
>I believe the "problem" with the Rotax is of a different nature.
There
>are two carbs, and the inlet pulses are not equally distributed. Each
>carb will see two inlet pulses in sequence, then followed by a long
>pause when the cylinders on the other side (fed by the other carb)
have
>their respective inlet pulses.
>After the pause, the flow of fuel inside the nozzles is stalled. With
>the first cylinder breathing, the fuel has to start moving again, and
>the second cylinder has the benefit that the fuel is already up to
>speed. So the second cylinder in the sequence receives a slightly
richer
>mixture.
>A solution can be to use a bigger bore balance tube. Some Italian
>company is selling a pair of manifolds and balance tube for this
>purpose, and the manifolds have already the bosses in them to mount
fuel
>injectors for future upgrades (and using the carbs as fuelless
throttle
>bodies and backup in case the EFI fails).
>
>Ok,the subject was "Jabiru". To keep it in the subject: After the
long
>list of problems and disadvantages, can anybody enlighten me what the
>benefit is of the Jab over the Rotax? (I assume there must be one,
why
>else would anyone bother to install one?)
>
>Frans=================
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