Today's Message Index:
----------------------
1. 09:27 AM - Re: Flaps Travel (Bryan Martin)
2. 10:49 AM - Fuel delivery (Ken)
3. 11:15 AM - Re: Fuel delivery (Gig Giacona)
4. 12:38 PM - Re: Fuel delivery (Carlos Sa)
5. 04:05 PM - Re: Fuel delivery (Juan Vega)
6. 04:58 PM - Re: Fuel delivery (Bryan Martin)
7. 08:23 PM - Re: Re: Brake Lines - Zodiac XL, CH 701 and CH 801 (J.T. Machin)
Message 1
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| Subject: | Re: Flaps Travel |
20 degrees should work for most landings. If you need a steeper
approach, use full flaps and a forward slip. At about 50 MPH and all
the rudder and opposite aileron you can manage, the plane will drop
lake a rock, then just kick it straight and give it a short shot of
throttle just before the flare.
On Jun 19, 2008, at 7:50 PM, dingfelder wrote:
> Boys & Girls,
> I've looked through the archives, and found
> only a little on this, though I think I remember previous
> discussion. Given the stroke of the flap motor (Feb. 2006 kit),
> I can only achieve 20 to 22 degrees travel with the linkage in it's
> most geometrically optimized position. I could gain maybe 2 degrees
> more by drilling a new (lower) hole in the torque tube arms. So
> ---- Is this sufficient for all purposes, including perhaps a steep
> approach for an off airport landing? Have others had the same
> outcome? Comments please.
>
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
do not archive.
Message 2
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I'm considering putting an electric fuel pump in each wing of my XL. In each
case a check valve would follow before going to the gascolator which would be
in the engine compartment. An electric toggle switch would control which pump
was on while the check valves would keep each tank from filling the other. The
downside to this is that the gascolator would be under a couple of pounds of
pressure and would also be subject to engine compartment temperatures. Am I
ignoring any other pitfalls or are either of the above concerns a "deal breaker"?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=188794#188794
Message 3
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| Subject: | Re: Fuel delivery |
You might consider a fuel selector as per the plans (that does away with the separate
check valves and reduces the switchology error possible with two separate
valves) and the gasolator in the floor on the cabin side of the firewall reduces
the heat issue.
I do understand the desire to have the pumps in the wings close to the tanks but
there is a not insignificant down side to that. You have fuel, under pressure,
in the cockpit.
--------
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=188801#188801
Message 4
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| Subject: | Re: Fuel delivery |
Ken, it seems the pumps near the tanks are a common approach.
A downside is that you may end up with a failed pump connected to a full
tank, and a good pump connected to an empty tank.
Cheers
Carlos
CH601-HD, plans
assembling left wing
2008/6/20 Ken <hror1@pld.com>:
>
> I'm considering putting an electric fuel pump in each wing of my XL. In
> each case a check valve would follow before going to the gascolator which
> would be in the engine compartment. An electric toggle switch would control
> which pump was on while the check valves would keep each tank from filling
> the other. The downside to this is that the gascolator would be under a
> couple of pounds of pressure and would also be subject to engine compartment
> temperatures. Am I ignoring any other pitfalls or are either of the above
> concerns a "deal breaker"?
>
>
Message 5
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| Subject: | Re: Fuel delivery |
if you have an engine driven fuel pump what you are trying to design as an absolute
waste of design time and money. the pump is there to prime the system and
as a back up in event of engiuen driven fuel pump goes out. Keep it simple.
then in an emergency you are trying to chase the problem. In an emergency
you will be preoccupied flkying the plane firsdt, then thinking"OK switch pumps...
no not that one ... oh shit which ones off/on etc.." KEEP IT SIMPLE.. KEEP
TO THE PLANS.
Juan
-----Original Message-----
>From: Ken <hror1@pld.com>
>Sent: Jun 20, 2008 1:46 PM
>To: zenith-list@matronics.com
>Subject: Zenith-List: Fuel delivery
>
>
>I'm considering putting an electric fuel pump in each wing of my XL. In each
case a check valve would follow before going to the gascolator which would be
in the engine compartment. An electric toggle switch would control which pump
was on while the check valves would keep each tank from filling the other.
The downside to this is that the gascolator would be under a couple of pounds
of pressure and would also be subject to engine compartment temperatures. Am I
ignoring any other pitfalls or are either of the above concerns a "deal breaker"?
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=188794#188794
>
>
Message 6
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| Subject: | Re: Fuel delivery |
I have my gascolator in the cabin floor just ahead of the spar at the
low point of the system and two Facet pumps in parallel just ahead of
the gascolator (one is a backup), I don't have an engine driven pump.
No need for check valves and the gascolator is not pressurized, just
the couple of feet of hose between the pumps and firewall. I have
never had a problem with fuel delivery to the engine even with auto
gas on very hot days. I also never have to guess which tank to switch
to if I run a tank dry. The bottom of the tanks are several inches
higher than the pump inlets so there is always gravity feed to them.
It's usually best to keep the fuel system as simple as possible as
long as it will reliably deliver fuel to the engine.
On Jun 20, 2008, at 1:46 PM, Ken wrote:
>
> I'm considering putting an electric fuel pump in each wing of my
> XL. In each case a check valve would follow before going to the
> gascolator which would be in the engine compartment. An electric
> toggle switch would control which pump was on while the check valves
> would keep each tank from filling the other. The downside to this
> is that the gascolator would be under a couple of pounds of pressure
> and would also be subject to engine compartment temperatures. Am I
> ignoring any other pitfalls or are either of the above concerns a
> "deal breaker"?
>
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
do not archive.
Message 7
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| Subject: | Re: Brake Lines - Zodiac XL, CH 701 and CH 801 |
I am in Wrightwood. I have an XL quick build that is just about ready to move
to the airport (Apple Valley in a month or so) and would be interested. I have
the kit supplied lines partially installed. You can contact me at stormyflight@yahoo.com
Let me know,
Jim Machin
XL quick build, 0-200
My error, I see that I failed to (in my first post) to state that.
The city is Upland, the state is So. California (5min from CCB airport).
If there are builders within...say 1-1/2 hour drive I would be willing to meet
any builders who may be interested.
Thank you for taking the time to view this posting and responding.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=188608#188608
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