Today's Message Index:
----------------------
1. 04:49 AM - Re: Allegro 2000 - Rotax 912UL Engine (Thom Riddle)
2. 11:01 AM - Re: Allegro 2000 - Rotax 912UL Engine (hgmckay)
3. 01:51 PM - Re: Allegro 2000 - Rotax 912UL Engine (Thom Riddle)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Allegro 2000 - Rotax 912UL Engine |
--> Allegro-List message posted by: Thom Riddle <jtriddle@adelphia.net>
Hugh,
I know you did not address this to me and I can't answer your question
about the stall warning but I can tell you something about the five
point fuel distribution block. There is only one tiny restrictor
orifice in mine and it is in the branch that goes to the fuel pressure
gauge. The purpose of this is to restrict flow to an absolute minimum
in case this fuel line ruptures. If a fuel line going into the cockpit
ruptures and you don't have this restrictor, the cabin could be flooded
with fuel. A very hazardous condition. This pressure gauge does not
need flow but only pressure to do its job and restrictors in
pressurized fuel lines that go to the cabin are standard on GA
aircraft.
If I remember correctly, your airplane has the aux. fuel tanks. Ours
does not, so I don't know how the extra fuel lines are plumbed. I know
that you do NOT want a restrictor in a fuel SUPPLY line as it would
starve the carburetors. I would ask Doug at B Bar D about where the
second restrictor is supposed to be. It may have been installed in the
distribution block by mistake.
Thom in Buffalo
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Allegro 2000 - Rotax 912UL Engine |
--> Allegro-List message posted by: "hgmckay" <hgmckay@bellsouth.net>
Thom: I did ask Doug Hempsted about the two restrictor orifices. His reply was
that both are are required. he did not explain why, but based on your explanation
two would apply in my case because there are two fuel lines coming back into
the cockpit. One being the fuel pressure gauge, the other the fuel return line
to the main fuel tank (see the Rotax engine installation manual page 38 of
66).
On another topic, (Static rpm test), can I safely do this test with the wings off
the plane? As you know I do have wing tanks, but I am waiting on the new replacement
aluminum tanks so I don't want to put the wings on and then have to
take them off again to insert and attach the wing tanks. I would connect all the
fuel lines in the cockpit, but cut off the fuel lines going to the wing tanks
with their respective cut-off valves at the two side cover sheets adjacent
to the root of each wing. Any comments about this test without the wings on?
Hugh
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=48596#48596
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Allegro 2000 - Rotax 912UL Engine |
--> Allegro-List message posted by: "Thom Riddle" <jtriddle@adelphia.net>
Hugh,
I see no problem with doing static run-up w/o wings. Not much chance of it getting
airborne that way :-). As long as you do the fuel line configuration as you
stated, the engine won't care and the fuel won't be flying out all over the
place. It should go without saying but it does not hurt to remind you to make
sure the airframe is well secured before doing a full throttle static run-up.
If you are doing carb idle speed adjustments in the process, make sure the engine
is up to normal operating temperature(190F min) before doing so. You may not
be able to finalize the idle speed until after you've flown it. The idle speed
at 120F can be 200-300 rpm different than at 190F or higher. At higher oil
temps, the idle speed is higher.
--------
Thom in Buffalo
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=48647#48647
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|