Hi Terry,
A 12000 Ft runway ? Cool no problem, pleased read my other e-mail
to you.
Take care
Kevin
Sent from my iPad
On 25 Jun 2013, at 17:27, "Terry Seaver (terrys)" <terrys@cisco.com> wrote:
>
> Hi Kevin,
>
> Sorry to alarm you with my crazy behavior, but our Europa is legally a motor
glider, and as such, we do on occasion shut the engine down (and feather the
prop).
The first time was in gliding range of the old Castle Air Force base with
a 12,000 foot runway.
> Even with the short wings installed, I feel it quite appropriate to explore
> the
power off/on and reserve tank behavior, under controlled conditions, or course.
It is, after all, an experimental aircraft, which makes us all test pilots,
I believe.
>
> Regards,
> Terry
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Kevin Kedward
> Sent: Monday, June 24, 2013 6:26 PM
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Use of reserve tank
>
>
> Gentlemen ,
> I'm stunned by this discussion. Why would you wish to go anywhere near running
out of fuel? I would never take p2 with you or allow my family to take a flight
with any of you!!. This talk about changing from one side of the tank and
guessing what is sloshing about in the reserve is crazy and what kills people.
In 14 years of Europa flight I have had no reason to go anywhere near running
out of fuel. How is it that some guys have to tape up the filler cap ? Or
extract litre's of water out because it was in a shower ? It's news to me....
I think I'll buy an umbrella :) Kevin the safe one.
>
> Sent from my iPhone
>
> On 25 Jun 2013, at 00:30, Kevin Klinefelter <klinefelter.kevin@gmail.com>
> wrote:
>
>> --> <klinefelter.kevin@gmail.com>
>>
>> Hi Terry and all,
>> I stopped my 914 a couple days ago,feathered the Airmaster and went for a
>> long
glide. Windmill start happens at about 90 knots.
>>
>> I was doing touch and goes a while back in my Mono and ran out of fuel on the
main just after liftoff. No problem, I just landed on the remaining runway,
but that really got me thinking! I didn't realize my fuel was quite that low.
So now my Takeoff and Landing checklist includes fuel selector on reserve.
>>
>> Kevin
>>
>> On Jun 24, 2013, at 2:25 PM, "Terry Seaver (terrys)" <terrys@cisco.com>
>> wrote:
>>
>>> --> <terrys@cisco.com>
>>>
>>> Hi Bob,
>>>
>>> We have shut the engine down in flight with both the Whirlwind CS prop and
the Airmaster. In both cases, the prop stops turning just above 50 knots, and
once stopped, does not begin wind milling again until a little over 100 knots.
This is with the 912S, which has higher compression than the 914, so your
numbers
may vary from this.
>>>
>>> Regards,
>>> Terry
>>>
>>> -----Original Message-----
>>> From: owner-europa-list-server@matronics.com
>>> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Bob
>>> Harrison
>>> Sent: Monday, June 24, 2013 1:48 PM
>>> To: europa-list@matronics.com
>>> Subject: RE: Europa-List: Use of reserve tank
>>>
>>> --> <ptag.dev@tiscali.co.uk>
>>>
>>> Hi! Terry /all.
>>> I had an unplanned such event but with the direct drive Jabiru 6 fitted. I
have a long range tank fitted and although full did a wing over to position for
a photos shoot of a hotel as we left Majorca. Unbeknown that stopped the siphon
---From the long range tank to the main tank , About 2 hours later over the
Pyranees to the West Spanish coast we suddenly had total silence!
>>> Which is about the most sensitive thing that can happen to a powered
>>> flight pilot ! I estimate I lost about 50 feet of my then 5,000ft
>>> before the engine windmilled to start immediately. My friend with me
>>> asked what we would do to which I replied "you will need to turn
>>> round in your seat and pump that siphon hand ball to re-establish the
>>> siphon like you are milking a cow (or something like that !) When I
>>> could see the gauge was back reasonable again we switched to main
>>> tank but actually landed on the reserve tank by which time we knew
>>> was full to over flow the saddle. I must say I have never tried an
>>> in flight re-start with the gearbox Rotax Engine, I just don't like
>>> to tempt providence ! If someone has the minimum windmill speed of a
>>> 914 Rotax I'll be obliged to know ? and you would be doing me a real
>>> service.
>>> Also If Mark Burton is reading this would he advise if the Woodcomp Prop
>>> with
the Smart Controller is likely to motor to fully fine in the event of an abrupt
un intended engine stop ?
>>> Happy Days !
>>> Best regards
>>> Bob Harrison. G-PTAG
>>>
>>> -----Original Message-----
>>> From: owner-europa-list-server@matronics.com
>>> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Terry
>>> Seaver
>>> (terrys)
>>> Sent: 24 June 2013 19:19
>>> To: europa-list@matronics.com
>>> Subject: RE: Europa-List: Use of reserve tank
>>>
>>> --> <terrys@cisco.com>
>>>
>>> I have one comment on the subject of allowing the main to completely run
>>> out,
then switching to the reserve. We did that once to check the procedure in
a safe, controlled, environment. The engine quit but was still wind milling.
After switching to reserve, the engine restarted and went to high RPMs because
the Airmaster CS prop had gone to full fine pitch when the engine cut out, and
took some time to recover once the engine restarted.
>>> The lesson of the story is, pull the throttle back to idle before switching
in the reserve tank.
>>>
>>> Regards,
>>> Terry
>>>
>>> -----Original Message-----
>>> From: owner-europa-list-server@matronics.com
>>> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Sidsel &
>>> Svein Johnsen
>>> Sent: Sunday, June 23, 2013 2:29 PM
>>> To: europa-list@matronics.com
>>> Subject: SV: Europa-List: Use of reserve tank
>>>
>>> --> <sidsel.svein@oslo.online.no>
>>>
>>> Graeme,
>>>
>>> What we need to keep in mind is the following:
>>>
>>> When we run off the main tank, about 28-30 liters of fuel goes out
>>> per hour at cruise power (912ULS). Abt 10 of these liters return to
>>> the reserve tank (i.e. abt 1/3 of the total flow out of the tank),
>>> and flow back over the saddle into the main tank. This ensures that
>>> the reserve tank is always full, even if we should fly a little
>>> uncoordinated once in while or experience some bumpy turbulence, and
>>> the net drain from the main tank is
>>> 18-20 liters (or whatever the cruise consumption may be).
>>>
>>> What we should NOT do is switching to the reserve tank before we have
>>> decided
that "OK, this is it for the main tank, from now on it's only the
>>> reserve tank that will take me home." Take the following case: 9 liters
>>> in the reserve, 11 liters in the main. If this were the case during the
>>> last
part of a flight, we have 20 liters total, i.e. one hour's flying time.
>>> If due to uncertainty about actual volume remaining in the main tank, we
>>> switch
to the reserve tank (9 liters), then we have a little under half an hour
before the engine tells you something. If we now switch back to the main tank,
we suddenly do not have 11 liters consumable fuel there anymore!
>>> Why not? Because about 1/3 of that fuel is returned to the reserve tank,
>>> but
the returned volume does not any more overflow into the main tank because the
reserve tank first needs to be filled to its top. 10-15 minutes' flying time
is thus lost, which could be critical (unless we are conscious about this,
and switches back to reserve again).
>>>
>>> What it all boils down to is knowing how much you have left in the main
>>> tank,
so we can confidently run this tank almost empty and switch to reserve just
in time before the engine tells you to, and then stay on the reserve tank.
>>>
>>> I completely trust my fuel totalizer (feed and return flow senders) and the
sight tube. By the way, I have connected the two vent tubes (the one from the
top of the sight tube and the one to the top of the filler neck) by a crossover
tube at their highest point. If one inlet should be blocked by an insect
or whatever, the other will provide equal pressure on top of the tank and on top
of the fuel in the sight tube. It is amazing how erroneous the sight tube
reading gets even with a very small pressure difference in the standard tubing
arrangement - just try it by blowing gently into one of the outlets.
>>>
>>> /////////
>>>
>>> About return flow: I mentioned early this spring that I would re-wire the
fuel flow system so that I could get temporary direct reading of the return flow
only. I have the relay deck and the push button, but just have not had the
time to wire it in ........ Will do - will report!
>>>
>>> Regards,
>>> Svein
>>> LN-SKJ
>
>
>
>
>
>
>
>
>
>
|