Today's Message Index:
----------------------
1. 02:44 AM - Re: Monowheel to trigear conversion - figures (Frans Veldman)
2. 03:23 AM - Re: Monowheel to trigear conversion - figures (europapa)
3. 04:40 AM - Re: Right mag drop and rought running on 914 (Robert Borger)
4. 05:30 AM - FW: Wickenby Wings & Wheels( UK and Europe only) Sorry for any duplications. (Bob Harrison)
5. 08:59 AM - Re: Monowheel to trigear conversion - figures (Bud Yerly)
6. 03:16 PM - Re: Right mag drop and rought running on 914 (Alan Carter)
7. 03:29 PM - Re: Right mag drop and rought running on 914 (Alan Carter)
8. 03:47 PM - Re: Monowheel to trigear conversion - figures (jonathanmilbank)
9. 06:07 PM - Re: Re: Monowheel to trigear conversion - figures (Karl Heindl)
Message 1
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Subject: | Re: Monowheel to trigear conversion - figures |
On 05/21/2013 02:30 AM, Robert Borger wrote:
> Eventually, the rest of the speed kit (flap hinge fairings) will go on and we'll
see how that helps.
Don't do the flap hinge fairings. They are very bad. They increase the
frontal area many times (pressure drag), increase the side area (skin
drag) and worst of all, they have an opening at the rear which is the
worst aerodynamic thing you can imagine. The hinges are fine as is,
leave them alone, except for the outer one (the double one), but this
one can be modified (or you could create a better fairing for it). To
give you an idea for a better "outer flap hinge fairing" look at the
attached pictures. I made a mold but never installed these fairings as I
decided later to modify the flap hinge itself.
Frans
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Subject: | Re: Monowheel to trigear conversion - figures |
Frans,
your objection to the "inner" flap hinge fairings sounds reasonable to me.
Thank you for that as I had in mind to apply them this year.
So if you dont want to apply your already build fairings maybe you want to sell
them to me [Wink] ?
Cheers
Juergen
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=401055#401055
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Subject: | Re: Right mag drop and rought running on 914 |
Jerry,
I'm with you on that thought. I seem to remember from my Rotax 9xx
class that the 912 was arranged like that but the 914 was simple A/top &
B/Bottom. But the Rotax 914 current Installation manual shows
different.
I've gone to the 912/914 Heavy Maintenance Manual, Ed. 1/ Rev. 0 date
May 01/2007 Section 74-00-00 3.1.0) page 19:
It shows the 914 as A/Top B/Bottom, which I believe is correct from what
I remember from my school.
It looks like the 2008 revision of the Installation Manual may be
incorrect.
I'll stop by the hanger some time today and dig up my copy of the
original installation manual that came with my 914 and see what it says.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
On May 20, 2013, at 9:52 PM, Jerry Rehn <rehn@rockisland.com> wrote:
Bob
I think they are out to confuse us!:)
That diagram is for the 912 , don't know why it's in that manual unless
there is a footnote
Somewhere. I do know that my 914 top module, top plugs, bottom module,
bottom plugs.
Guess we need a rotax guy to pipe in on this. Maybe can explain whats
what!
Jerry
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Subject: | FW: Wickenby Wings & Wheels( UK and Europe only) Sorry for |
any duplications.
Hi! All ,
No apologies for the =9CPLUG!=9Das follows:-
The Wickenby Wings and Wheels Air show is on 15th and 16th June and
promises to be a very good event to attend with possible showings of
Vulcan, Red Bull, and BBMF. Throughout the weekend.
With it being on Father=99s day weekend what better excuse that a
day with =9CBig Boy=99s Toys=9D than Aeroplanes.
There will be lots of side stalls and attractions for kids and static
aircraft, 4x4 off roading, vintage vehicles and a Fun of the Forties
two course Dinner Dance with live music by Swingtime Jazz Band and bar
in a Marquee.
Aircrew Camping is permitted .
Tickets for the event are available on the website
www.wickenbyairfield.com/www currently still at the special offer price
of =C2=A310 for adults & =C2=A35 for children for a single ticket or
=C2=A315 & =C2=A37 for the weekend saver tickets. Also available on
line are tickets for the Fun of the Forties Dinner Dance at =C2=A330 for
a two course meal, 40s disco & live swing band
=9CSwingtime=9D, along with a sunset aerobatic display from
the Swip Duo complete with pyrotechnics. If you want to stay over for
the whole weekend there are still spaces available on our campsite at
the very reasonable price of =C2=A315 for the weekend. You can also get
your tickets by contacting Ann Law direct at alaw444@aol.com.
Message 5
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Subject: | Re: Monowheel to trigear conversion - figures |
Photo E-mail View slideshow
<https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=play&
resid=2161856909618AA7!346&parid=2161856909618AA7!130&type=5&authke
y=!AKnPGp8SHrmYj5k>| Download images
<https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=downl
oadphotos&resid=2161856909618AA7!346&parid=2161856909618AA7!130&type=
5&authkey=!AKnPGp8SHrmYj5k>
Frans, but mostly for others reading this stuff:
I believe that a two part fairing is the answer. I don't have time to
finish it as we are swamped, but the forward fairing I use is left
nearly as it is now. It bolts to the bracket using two nutplates (my
usual way to install the outer bracket). I fabricated a flap fairing
from foam that fits into the slot on the forward bracket to get rid of
that nasty gap at the back. Cleaner aerodynamically, but what a bugger
when it comes to the annual inspection. I now use a screw attach on the
forward cover to the wing and to the bracket of course, and just a bit
of white caulk to seal the edge. Drill a hole in the bottom of the
cover for water of course.
My rear fairing will be added to the flap and attached with adhesive
sealant. I got stopped when I was trying to keep the gap sealed through
full flap travel. Also, for the mono, the flaps will weigh more and I
think that my induce a bit of droop which the owner did not have with
his current setup.
The Europa inner brackets will look awful unless spacers are planed to
keep them from distorting. Again, they are not as important as the
outer, but the plane looks more complete with them.
Pay attention to gear leg covers, transitions and wheel pant height and
alignment. A droopy wheel pant is like a parachute. The lower the
wheel pant (no lower than the bottom of the wheel rim), the better the
speed. For grass strips, well compromises have to be made. Lift the
pant up to prevent the rear lip from tear out from the grass whipping
it.
12AY went from 107 with a fixed pitch Warp Drive set at 5200 static on
the 914. With the Airmaster I jumped to 117 KTS at 1000 MSL
(914/Airmaster 332) and now at the same power setting of max continuous
(34 inches/5500 RPM) it does right at 136 KTAS. With some tuning and
tweaking and only one on board a 920 lb empty weight aircraft and all
polished up, I hit 146 KTAS at 1000 MSL in the traffic pattern (I fixed
the stock 914 inlet duct cowl seal leak at the rear also which was like
a parachute). These cleanups allow a 26 inch/ 5000 RPM cruise at
1000MSL of 127 at about 4.5 GPH. Obviously at 8500 MSL my true airspeed
is quite comfortable at 130 ish to get 28 NM/Gal which is over 30 Statue
MPG.
(Airspeed calibration is less than 2 knots below 100 KIAS and spot on
above 100KIAS to 160KIAS.)
Our last Europa XS, High Top, at 1400 lbs. as tested, equipped with 912S
with Airmaster AP332 does 136 Knots at 1000 MSL at 26 inches and 5500
RPM just using the above techniques.
Gear leg covers add speed, pay attention to the details and think like
an air molecule.
A bit of work with clay and filler and you can get a few more knots, but
much more fuel efficiency. Pay attention to your cowl duct seals also.
That is more knots than you think also.
Finally, the rig of the aircraft makes a big difference. Droopy flaps
are the worst. If all is not straight at cruise, (trim tabs also) it
slows you down.
Regards,
Bud Yerly
<https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=play&
resid=2161856909618AA7!347&parid=2161856909618AA7!346&type=1&authke
y=!AKnPGp8SHrmYj5k> Typical glass up of fairing. Note it is not a
thing of beauty at first, but it fits the leg. This photo makes it look
like the front has a flat bottom, but that is an optical illusion.
These are my flip up pant inner brackets. NOTE: The inner bracket is
attached to the metal bracket. Cuts in this are for the gear inner
bracket to be able to be removed for a brake job.
<https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=play&
resid=2161856909618AA7!348&parid=2161856909618AA7!346&type=1&authke
y=!AKnPGp8SHrmYj5k> Pay attention to allow for flex and filler and
paint. Use a block sander and square up your final install.
<https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=play&
resid=2161856909618AA7!349&parid=2161856909618AA7!346&type=1&authke
y=!AKnPGp8SHrmYj5k> Aft portion of this cover has a small amount of
gap to allow for gear flex also. It is a great idea to use clear 3M or
glider wing tape as an anti chafe for your paint. These joints flex.
(This gear is flexed with 400 lbs in the seat and full gas and you can
see it just touches.
<https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=play&
resid=2161856909618AA7!350&parid=2161856909618AA7!346&type=1&authke
y=!AKnPGp8SHrmYj5k> Keep it small and simple. Bigger is not better.
Note these are the standard Europa supplied pants, so the cut is
right down the center of the fairing. You can make a joggle if you
wish, but it is not necessary if your gaps are small and are glass, not
filler.
<https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=play&
resid=2161856909618AA7!351&parid=2161856909618AA7!346&type=1&authke
y=!AKnPGp8SHrmYj5k> This nose gear cover is a bit high so the shimmy
dampener is visible for grease leakage. The pant is made with the hinge
line set on an angle to allow quick access to the nose wheel for
servicing and inspection.
----- Original Message -----
From: Frans Veldman<mailto:frans@privatepilots.nl>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Tuesday, May 21, 2013 5:43 AM
Subject: Re: Europa-List: Monowheel to trigear conversion - figures
On 05/21/2013 02:30 AM, Robert Borger wrote:
> Eventually, the rest of the speed kit (flap hinge fairings) will go
on and we'll see how that helps.
Don't do the flap hinge fairings. They are very bad. They increase the
frontal area many times (pressure drag), increase the side area (skin
drag) and worst of all, they have an opening at the rear which is the
worst aerodynamic thing you can imagine. The hinges are fine as is,
leave them alone, except for the outer one (the double one), but this
one can be modified (or you could create a better fairing for it). To
give you an idea for a better "outer flap hinge fairing" look at the
attached pictures. I made a mold but never installed these fairings as
I
decided later to modify the flap hinge itself.
Frans
These photos will be available on SkyDrive for 30 days. To learn more
about SkyDrive, click here<http://g.msn.com/1cl91enus/PMFooter>.
To share high quality pictures with your friends and family using MSN
Photo E-mail, join MSN<http://g.msn.com/0PHenus1/29>.
Message 6
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Subject: | Re: Right mag drop and rought running on 914 |
Hello Chaps.
I don't think Rotax has any bloody standardisation in fact from a logical design
point of view I could do better.
What I wanted to know was ,when the say "L" mag switch is selected ON, what's components
are live and working. So the last time I replaced a coil I colour coded
all from the plugs to the mag switch.
"R" was green and the top plugs,
"L" was red and the bottom plugs.
Simple follow the red or the green all the way.
So I have trouble down the green route ie to the top plugs, so have been looking
in this area.
But today I found out I colour coded it the wrong way round,
My green route actually goes to the bottom plugs and not the top plugs, so my trouble
is not where I thought it was. (see code above)
My Proof is:Running on BOTH >smooth
Running on "L" smooth.
Running on "R" rough, then with one lead off the bottom row, Running very rough.
So "R" =Bottom Row of plugs.
It really depends on how the builder grounded the Mags on the Mag Switch
WHAT IS THE STANDARD WAY ????????
This is my 914.
"R" (coded Red route now) > Bottom Module >Bottom Coils >Bottom Plugs(red)
"L" (coded Green route now)>Top Module > Top Coils >Top Plugs (green).
"BOTH" Top and Bottom together.
So ignition "A"= (Top plugs) which is Mag Switch position (L) down the green route.
Ignition "B" = (Bottom plugs) which is Mag Switch position (R) down the red route.
Simple YES.
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=401093#401093
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Subject: | Re: Right mag drop and rought running on 914 |
Hi,
Just one more point, look at the mag diagram.
4 coils, all have a (moulding shape) on the rear back side,
Three of these (moulding shapes) face upwards,
On front lower right coil, this (shape) faces downwards,
opposite way round to all the others, so be careful.
If I had designed it there would all be facing or pointing is the same direction.
I am sure that in the electronics design this could have been achieved,
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=401094#401094
Message 8
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Subject: | Re: Monowheel to trigear conversion - figures |
Couple of things. I thought long and hard before converting to tri-gear and prioritised
my needs: a) Make the whole landing experience less fraught. b) Keep
it as light as possible. c) Retain the smoothness and economy of the 80 hp engine.
d) Don't spend a fortune.
We have precious few tar runways in the UK which don't charge eye-watering landing
fees. So operating on grass in a normally damp climate makes spats less advisable,
due to clogging with mud and grass.
Our permit system doesn't allow unfettered freedom to design and experiment with
such things as fairings and spats, or anything else, except that engineering
approval gets obtained through submitting descriptions, drawings, photographs,
analyses and the appropriate fee for modification approval. Therefore the usual
route to installing a mod is to buy something already approved from a supplier.
Because we're presently limited to 1370 lbs mauw, we need to think harder before
loading up with goodies. For me, the idea of flying a Europa with an empty weight
in the mid 900 range is beyond consideration. It would mean a huge trade-off
between fuel and payload. "Roll on 1450 lbs mauw", I say.
You guys across the pond enjoy greater freedoms, while being expected to shoulder
a much greater load than us for public liability. But thanks for all your insights
and suggestions given above.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=401095#401095
Message 9
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Subject: | Re: Monowheel to trigear conversion - figures |
Jonathan=2C
The weight shouldn't be a problem=2C of course official sanction of 1450 lb
s would be useful. Remember=2C that the Katana=2C which is a much heavier a
ircraft=2C has been flying with the 912 for many years without problems.
Karl
> Subject: Europa-List: Re: Monowheel to trigear conversion - figures
> From: jdmilbank@yahoo.co.uk
> Date: Tue=2C 21 May 2013 15:47:32 -0700
> To: europa-list@matronics.com
>
uk>
>
> Couple of things. I thought long and hard before converting to tri-gear a
nd prioritised my needs: a) Make the whole landing experience less fraught.
b) Keep it as light as possible. c) Retain the smoothness and economy of t
he 80 hp engine. d) Don't spend a fortune.
>
> We have precious few tar runways in the UK which don't charge eye-waterin
g landing fees. So operating on grass in a normally damp climate makes spat
s less advisable=2C due to clogging with mud and grass.
>
> Our permit system doesn't allow unfettered freedom to design and experime
nt with such things as fairings and spats=2C or anything else=2C except tha
t engineering approval gets obtained through submitting descriptions=2C dra
wings=2C photographs=2C analyses and the appropriate fee for modification a
pproval. Therefore the usual route to installing a mod is to buy something
already approved from a supplier.
>
> Because we're presently limited to 1370 lbs mauw=2C we need to think hard
er before loading up with goodies. For me=2C the idea of flying a Europa wi
th an empty weight in the mid 900 range is beyond consideration. It would m
ean a huge trade-off between fuel and payload. "Roll on 1450 lbs mauw"=2C I
say.
>
> You guys across the pond enjoy greater freedoms=2C while being expected t
o shoulder a much greater load than us for public liability. But thanks for
all your insights and suggestions given above.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=401095#401095
>
>
>
>
>
>
>
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