Today's Message Index:
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1. 02:33 AM - Re: beringer wheel & brake for monowheel (Jan de Jong)
2. 06:43 AM - The 914 saga ()
3. 03:08 PM - Re: Arplast PV 50 Prop (Alan Carter)
4. 03:17 PM - Re: Re: Arplast PV 50 Prop (GRAHAM SINGLETON)
5. 03:40 PM - Re: Arplast PV 50 Prop (Alan Carter)
6. 03:55 PM - Re: Re: Arplast PV 50 Prop (GRAHAM SINGLETON)
Message 1
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| Subject: | Re: beringer wheel & brake for monowheel |
Rowland,
Like you, I like the sound of it.
But the 4 kg weight loss seemed too good to be true.
Having shown an interest I received a pro forma offer (dated August
31st, 2012), that lists the partnumbers that will be in the kit:
JAB02-HE1 wheel 6.00-6" HIGH ENERGY 1 caliper - disc red n 1 off
PAD02 tyre 800-6 6PLY AirTrac 1 off
DIVERS AVION specific axle + caliper support + M. Cyl adapter 1 off
HAB02 brake m. cylinder RED for hand brake built in reservoir with
parking 1 off
HZA01 pressure limiter ultra light 35 bars DOT4 1 off
HDB01 stainless steel brake hose per meter 2,5 off
HEA01 banjo fitting 20 3 off
HEA03 twin banjo 1 off
The catalogue on the website has the weights of these partnumbers.
Adding them up I get 9.232 kg.
This includes a probably representative axle (T3, 0.500 kg) and excludes
hose, banjos, fasteners and "caliper support + M.Cyl adapter".
I also weighed the wheel and the brake components of the Europa kit:
10.8 +/- 0.1 kg.
This includes the brake handle and excludes hose, banjos, fasteners and
the parking brake construction to be made.
In conclusion - the weight advantage will be somewhere between 1.5 and 2 kg.
There are the other advantages ofcourse:
- brake on the stick
- parking brake included
And the disadvantages:
- brake hose routing
- great expense
Regards,
Jan de Jong
Message 2
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David -
"Fergus, That widget holding the cable in the wheel on top
of the turbo control unit has a disc under the screw. Make
sure it didn't lose any bits while it went round the
cockpit. You can take the spring off at the turbo end and
then simply pull the cable back and fix it. If you have
fired up the electrics you will know that the waste gate
cycles when you first switch on. The right position for it
is with the master switch on, the throttle at closed and
the waste gate closed ( i.e: with the cable pulled right
back). You can do minor adjustments at the other end of
the cable.I have reassembled / readjusted/ fiddled around
with that fixing a number of times and never had a problem
yet. Best of luck! It WILL BE WORTH IT! David, G-XSDJ"
Yes, my heart dropped when the widget went flying (I am in the
right-side cockpit - on the trailer - in the garden) and I heard it tinkling
on and off a number of surfaces behind my feet. Of course I was heartened to
find it was the whole widget, screw in, holding the small brass disc captive
- but thanks for the heads-up...
I think it all began when a young visitor flicked the power switch and
a pop rang out - the relay. He flicked it closed quickly and I think it put
the Turbo Motor setting out of whack. When I went to re-assemble the motor
pulley, there was about 55mm of cable missing and I could not re-site the
pulley. The tech at the agency suggested that the motor setting was at
fault, but I had pulled the waste gate lever to fully closed with a bungee
and still not enough cable emerged from the firewall. I think I will have to
examine the waste gate to see if anything is jamming it partially open. I am
hesitant to readjust the forward end of the cable for fear of never
re-acquiring the original length. Ah me.
Thank you for your advice and time............
Ferg
I have about two days of good weather until the next downwash from the
Pacific arrives........
Message 3
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| Subject: | Re: Arplast PV 50 Prop |
Hi All.
Just keep things simple, but with regards to propellers.
One blade rotating is out of balance, add another blade then more balanced, then
add another blade even more balanced so end up with four blades even better.
Well that's the way i see it, but is that really the case, which can you balance
the best a two bladed prop or a three bladed prop for the same out of balance
error.
Does a two bladed prop have certain advantages, besides being broader and stronger,
I don,t want to know about Blade Interference, just any other points. Anybody
!! You are not being tested.
Graham, good point on carbs, maybe this one in your expertise.
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=384162#384162
Message 4
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| Subject: | Re: Arplast PV 50 Prop |
3 blades are always smoother. Unless the axis of the engine is exactly coax
ial withe line of flight, the assymetric loads as the blades pass through h
orizontal cannot be balanced. Nothing to do with mass, it's the different A
oA of the two blades.=0AGraham=0A=0A=0A=0A________________________________
=0A From: Alan Carter <alancarteresq@onetel.net>=0ATo: europa-list@matronic
s.com =0ASent: Friday, 28 September 2012, 23:07=0ASubject: Europa-List: Re:
<alancarteresq@onetel.net>=0A=0AHi All. =0AJust keep things simple, but wit
h regards- to propellers.=0AOne blade rotating is out of balance, add ano
ther blade then more balanced, then add another blade even- more balanced
so end up with four blades even better.=0AWell that's the way i see it, bu
t is that really the case, which can you balance the best a two bladed prop
or a three bladed prop for the same out of balance error.=0ADoes a two bla
ded prop have certain advantages, besides being broader and- stronger, I
don,t want to know about Blade Interference, just any other points. Anybody
!! You are not being tested.=0A=0AGraham, good point on carbs, maybe this
one in your expertise.=0A=0AAlan=0A=0A=0A=0A=0ARead this topic online here:
=0A=0Ahttp://forums.matronics.com/viewtopic.php?p=384162#384162=0A=0A=0A
==================
Message 5
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| Subject: | Re: Arplast PV 50 Prop |
Grayham.
Yes as i thought, seem to remember something about assymetric blade effect critical
speeds on twins, to long ago.
But is there something good about a two bladed prop, Less Gyroscopic effect ??
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=384164#384164
Message 6
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| Subject: | Re: Arplast PV 50 Prop |
I would have thought more not less. The moment of inertia of a 2 blade migh
t be more because of a bigger diameter?=0A=0ASmoothness is more valuable; l
ess vibration, less disruption of laminar fow, less wear and tear of the en
gine and airframe=0AGraham=0A=0A=0A=0A________________________________=0A F
rom: Alan Carter <alancarteresq@onetel.net>=0ATo: europa-list@matronics.com
=0ASent: Friday, 28 September 2012, 23:39=0ASubject: Europa-List: Re: Arpl
carteresq@onetel.net>=0A=0AGrayham.=0AYes as i thought, seem to remember so
mething about assymetric blade effect critical speeds on twins, to long ago
.=0ABut is there something good about a two bladed prop, Less Gyroscopic ef
fect ??=0AAlan=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://forum
=============
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