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jan_de_jong(at)casema.nl
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 Posted: Tue Dec 29, 2009 1:30 pm Post subject: Monowheel tunnel dimensions? |
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Good evening,
I would like to ask a question regarding floor clearance in the (XS)
monowheel tunnel from the front of the tank back to the inboard bagage
bay supports.
How low does the flap drive rod go at most? How low does the flap cross
tube go at most?
My tentative estimate (after wielding the rod on the upside down cockpit
module and drawing lines on pictures) is 6 cm from the floor for the rod
and 4 cm from the floor for the cross tube - gear down / worst case.
I would be grateful for more knowledgable estimates from any of you who
have an installed monowheel flap drive.
I am hoping for at least 36 mm head room between the rudder cables.
But if you have other news that is ofcourse welcome too.
The reason I ask is that I am thinking of making a 5052-0 fuel tubing
harness - firewall to port bagage bay and intended for permanent
installation - while still having the cockpit module upside down. The
idea is to shape it now and put it in place later - the front section
glassed inside the wheel well under the break cylinder, the rear section
slid under the tunnel from the rear (with 2 clamp stands to be bonded to
the floor to immobilise). Three connections to be made in the fuel valve
area.
Thank you,
Jan de Jong
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craigb(at)onthenet.com.au
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| Posted: Tue Dec 29, 2009 7:12 pm Post subject: Monowheel tunnel dimensions? |
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I think quite a few of the mono builders are opting for the trike flap
drive, have you considered
this and eliminate the rod totally.
regards and happy new year
craig
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jan_de_jong(at)casema.nl
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| Posted: Thu Dec 31, 2009 4:37 am Post subject: Monowheel tunnel dimensions? |
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Hi Craig,
No, I hadn't considered it and after the interchange re Monowheel Flap
Operation I think I will stick with the build manual.
I will go ahead with expecting 4 cm clearance as nobody on the list
appears inclined to offer a fact or an opinion.
Jan
| Quote: | I think quite a few of the mono builders are opting for the trike flap
drive, have you considered
this and eliminate the rod totally.
|
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craigb(at)onthenet.com.au
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| Posted: Thu Dec 31, 2009 4:02 pm Post subject: Monowheel tunnel dimensions? |
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I just ran mine to the full flap position, and the clearance from the floor,
at the bottom
of the bend in the flap drive tube is 35mm, given the hardware is the same,
other than the
method of actuation, you should be alright if you aim for a height of 30mm
max for the lines.
the rudder cables (almost missed this in your first post) at that point are
50mm off the floor.
I have a variation on the singelton tail wheel mod, with the bell crank
mounted on the rear bulkhead
and a pushrod from there to the rudder, which lifts the cables up about 30mm
at the tail, which
given the arm would be about 5mm at the flap drive tube. If you intend to
stay with the original
rudder setup your estimate of 36mm would be safe, if a little conservative.
As far as possible I would suggest fitting AS MUCH stuff as you can,
including the fuel line
you mentioned, before you install the CM, any time spent here will pay you
back 10 fold
later, also when you run the lines up to the firewall be careful not to
encroach on the rudder cable
path. If you measure up (CM up the correct way for you to install in the
A/C) 150mm from the bottom
where it contacts the floor at the firewall, that is where the cables will
be when finally installed
and run a line from there to the rudder pulleys under the seats. Keep than
path clear for the rudder cables
and you will be ok.
If you have any further questions feel free to ask, keeping in mind I am
building a trike so some of my
mods (gascolators in tunnel, fuel selector on top of tunnel) will not be an
option for you.
happy new year
craig
PS do you know a Yep de Jong, he was a merchant seaman now lives in the US
in Mankato?
--
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