Europa-List Digest Archive

Sun 03/04/07


Total Messages Posted: 4



Today's Message Index:
----------------------
 
     1. 03:20 AM - Re: Re. mono gear collapse - One way to make the lever stiffer  (Stephan Cassel)
     2. 07:04 AM - Re: Re. mono gear collapse - One way to make the lever stiffer  (Peter Jeffers)
     3. 07:14 AM - Sun N Fun (Marty Mason)
     4. 01:30 PM - Fuel System (Graeme Smith)
 
 
 


Message 1


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    Time: 03:20:15 AM PST US
    From: "Stephan Cassel" <stephan@scassel.se>
    Subject: Re: Re. mono gear collapse - One way to make the lever stiffer
    Hi I think both David and Graham have made the right conclusions. The key thing is to make the gear lever as stiff as possible and no play when it is in gear-down locked position. One way to make the lever much stronger is NOT to bend the lever as per manual. Keep it straight. Moment may twist the lever, not much but enough to introduce a small play when forces in not in one plan. The optional strut will help but the strut is quite week. And Dural gets much softer when you try to bend it. The trick is to mount the lever on the other side of LG08S and use one counter sink bolt and file the edge of the lever slightly, see link below http://scassel.se/europa/cap4/images/DSCN1129.JPG (The smallest distance between lever and the landing gear frame will be about 2 mm) The lever will then go throw the tunnel exactly as per manual. http://scassel.se/europa/cap4/images/DSCN1130.JPG And, as David Joyce said, the joint between lever and LG08S must be solid as rock. Sanded contact surfaces and Araldite 420 make that possible. Regards Stephan LN -STE. Permit to fly. First flight when weather permits and then Pete Jeffers will kindly take here up for the virgin flight.


    Message 2


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    Time: 07:04:55 AM PST US
    From: "Peter Jeffers" <pjeffers@talktalk.net>
    Subject: Re. mono gear collapse - One way to make the lever stiffer
    Hi Stephan, As you say it is essential that the gear lever joint is absolutely rigid. There is the optional mod, or the =91bonded=92 approach or indeed both. Together with the solid joint must go the proviso, as clearly defined in the instructions, that there is positive contact at both downlock stops. This should ensure a safe downlock configuration. To ensure that this situation does not change over time and especially after =91heavy=92 landings, regular inspections need to be carried out. During the course of inspections on a couple of Europas I have found this positive stop contact to have been lost on one side. I have no reason to think that they were originally built this way but have got that way in service. The effectiveness of the over centre lock is negated if one side makes contact early. On the matter of =91keeping it straight=92 then this would seem fine just providing that at the up and locked position the gear handle is firmly sprung loaded into the detent in the gear lever slot. IE spring loaded to the right! If not there is a nasty tendency for the gear to come out of the =91up=92 position in flight, particularly in turbulence. This can happen at 165 kts! (flap limit speed?) How is the weather in Norway this weekend? I bet is was OK. Grrrrrrrrr. Pete Jeffers _____ From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Stephan Cassel Sent: 04 March 2007 11:19 Subject: Re: Europa-List: Re. mono gear collapse - One way to make the lever stiffer Hi I think both David and Graham have made the right conclusions. The key thing is to make the gear lever as stiff as possible and no play when it is in gear-down locked position. One way to make the lever much stronger is NOT to bend the lever as per manual. Keep it straight. Moment may twist the lever, not much but enough to introduce a small play when forces in not in one plan. The optional strut will help but the strut is quite week. And Dural gets much softer when you try to bend it. The trick is to mount the lever on the other side of LG08S and use one counter sink bolt and file the edge of the lever slightly, see link below HYPERLINK "http://scassel.se/europa/cap4/images/DSCN1129.JPG"http://scassel.se/euro pa/ cap4/images/DSCN1129.JPG (The smallest distance between lever and the landing gear frame will be about 2 mm) The lever will then go throw the tunnel exactly as per manual. HYPERLINK "http://scassel.se/europa/cap4/images/DSCN1130.JPG"http://scassel.se/euro pa/ cap4/images/DSCN1130.JPG And, as David Joyce said, the joint between lever and LG08S must be solid as rock. Sanded contact surfaces and Araldite 420 make that possible. Regards Stephan LN 'STE. Permit to fly. First flight when weather permits and then Pete Jeffers will kindly take here up for the virgin flight. "http://www.matronics.com/Navigator?Europa-List"http://www.matronics.com/ Nav igator?Europa-List "http://forums.matronics.com"http://forums.matronics.com 03/03/2007 08:12 -- 03/03/2007 08:12


    Message 3


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    Time: 07:14:29 AM PST US
    From: Marty Mason <captainmarty@bellsouth.net>
    Subject: Sun N Fun
    I will be at Sun N Fun. Unfortunately driving again this year. The 11 o'clock AM meeting at Europa 2004 worked well last year so look for me there. My cell phone is 678-427-8826. Looking forward to seeing all the Europaphiles in April. Marty Mason Kit 291A XS Mono Short Wing Rotax 912 c/s prop 20% 99% to go


    Message 4


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    Time: 01:30:10 PM PST US
    From: "Graeme Smith" <gcsmith@flyer.co.uk>
    Subject: Fuel System
    Hi Graham, I'm just getting around to fitting the new fuel system and have a few questions: 1. I had understood that rigid tubing could only be used in the tunnel and that flexible tubing (i.e. hose) was required for the attachment to the tank (since it is 'floating') and inside the engine compartment (since the connections to carbs, mech fuel pump etc have hose connections. Your parts list and diags don't really mention the fuel runs in the engine bay, at what point do you change from rigid alu tube to hose? Given the excessive temps in the engine bay due to poor cooling airflow, what spec hose do you use? 2. I was planning to install a fuel computer, there has been a lot of chat on the internet about fuel flow sensors, and the conclusion seems to be that floscan are the only ones that will not block fuel flow if the impeller jams, however they don't seem to work with the Stratomaster FF2 which is the computer that I was thinking of installing so this part of it might have to wait til the next rebuild. 3. You recommend bonding a length of alu tube into the tank fitting. Does this just feed the drain fitting? Is this really necessary, surely if you want to drain the tank either pull the whole tank fitting out, or lift the tail so that the fuel flows to the front of the tank. 4. There are no coarse filters in the tank. Since the fuel has to pass through the tight narrow passages in the fuel tap etc before getting to the gascolator (I still have the original Europa one, haven't yet decided whether to replace with the Andair), it seems that any crud in the tank is best trapped there. I have got a pair of finger strainers from LAS, and was going to bond them into the tank fitting instead of the drain tube. Do you see any problem with this? Hope all is well with you, Graeme




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