|
|
Scott,
Thanks for the reply. If the ground was bad to the
dimmer system why would the flickering go away when
the alternator is turned off?
I do also have a little alternator whine in the
headset that also goes away when the alternator is
turned off.
That is a good point though. I will take a closer look
to see if other lights not running through the dimmer
are doing the same thing. If so I will look closer at
the regulator. If not I will investigate the dimmer. I
should have already done that.
I am using the suzuki samuri alternator with the
voltage reg removed. I have a seperate Ford style
regulator. The battery is an RG25 by concord.
As for the low side hydraulic pressure, shouldn't that
side be open to the resevoir when the gear is up
keeping that side at 0? I am not entirely sure how the
hyd pump operates as it relates to pressure on the
oppisite side of the system when it is running.
When I originally installed and tested the gear I
could open the dump valve and move a gear leg by hand
up and down with little resistance. Now when I do the
same thing (open the dump valve on the jack stands and
push the gear up by hand) I notice there is some
resistance or building pressure as the gear leg is
pushed up into the wing. I am not sure what has
changed or if this is normal. With the dump valve
open, what would cause the building resistance? I
would think that whatever the position of the gear,
the opposite side should be open to the resevoir at
the pump. Randy..
--- Sky2high@aol.com wrote:
Randy,
Flickering Lights
The voltage regulator is certainly a possibility. How about a loose connection to your light dimming circuitry or a bad
ground there? What alternator, regulator and battery are you using?
Lo side pressure
It is hard to imagine the low side fluid expanding
since there is so little of it available when everything is sucked up. However, if the stops are, uh, not rigid, it is conceivable that the up side fluid
pressure rise could push the piston further, maybe thru fluid expansion in
the nose wheel well actuators that are heated by lower cowling air
entering the well during flight. The ambient temperature rise in the main gear wells
doesn't seem high enough to have much of an effect except that it isn't helping
relieve any pressures. Maybe Chris has more useful information. Luckily
your pressures are different enough that the dump valve relieves the
lo side enough to allow the pump to come on.
Scott Krueger AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)
A man has got to know his limitations.
In a message dated 11/20/2006 9:16:51 A.M. Central
Standard Time, randylsnarr@yahoo.com writes:
I haven't posted in a while as I have been busy
flying
and completing my interior.
I will post a few pics when I am completed to keep the
grinding, sanding crowd motivated.
Anyway, I was flying recently near dark and I had
the
panel switch lights on. Can someone tell me why my
lights flicker with the alternator on? When I turn the alternator off the flicker goes
away.
Is this just a bad voltage regulater or something
else?
Ironicly my wifes Lexus suv started doing the same
thing. Maybe it is her fault!
2nd question. I have experienced the same issue as
some have documented regarding the gear not coming
down without recycling the dump valve. I flew on
Friday and noticed something interesting. Here are the facts:
Depart from PVU
50 deg f
4500 ft field elev
cruised at 12.5 for 1.2 hrs to a warmer place
decend to 4000 ft new atmosphere temp near 65 f
I have gauges on the high and low side of the hyd
system
After take off they idicated low-0 and high-1300 or
so.
After decending to a warmer atmospheric conditions
both the high and low side of the hydraulic system
had significantly risen. low 400 psi and high 1700
psi.
What happens in my case is the system pressure rises
in cruise on the high and low side. The lower side
exceeds the high pressure switch and the gear does
not
come down. I open the dump valve and then close it
and
the gear acts normally. My question relates the down side witht he gear up.
It would seem to me that that side should always stay
at 0 relieving pressure back to the resevoir in the
pump.
At first I thought I may have a leak somewhere
allowing the pressure to sneak past the high side
to
the low side in cruise. I do not believe that is
happening to me as both the high and low sides rise.
Can someone give me some idea where to start?
____________________________________________________________________________________
Sponsored Link
Mortgage rates near 39yr lows. $310k for $999/mo. Calculate new payment! www.LowerMyBills.com/lre
|
|