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fklein(at)orcasonline.com
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 Posted: Sat Jan 17, 2009 3:18 pm Post subject: mono-bungees |
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I've heard stories of some of you old hands replacing worn bungee cords.
Having just now installed the LG bungee system, I would like to treat
any man to his favorite beverage at the next opportune moment if he
was able to replace his bungees without totally removing his engine.
Fred
A194
do not archive
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ErichDTrombley(at)juno.co
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| Posted: Tue Jan 20, 2009 11:42 am Post subject: mono-bungees |
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Fred,
Where and when shall we meet to take you up on your offer of a beverage. While it is certainly easier to replace the bungee with the engine off I was not willing to go to that length. Instead the bungee can be removed/replaced by simply supporting the plane by what ever means you find sutaible and removing the wheel from the LG frame. Also, I remember detaching the damping block and shock from the swing arm and fixing it up and out of the way with some wire. Obviously the removal of the old bungee is a no brainer. The installation of a new bungel is a little trickier. Going from memory...I wrapped packing tape over the last several inches of the new bungee and extended a tail about 12" or so. The tail was feed up and over the top of the LG frame and pulled from under the lower LG frame. The process was repeated until the entire length was installed. The firewall aids in this regard forcing the tail over the top. I also remember using a broom stick as an axel and so
me gym weights (to simulate the weight of the wheel) to adjust the final tension of the bungee. Hope the above make sense.
Kind regards,
Erich Trombley
N28ET Classic Mono 914
Visit - www.EuropaOwners.org
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fklein(at)orcasonline.com
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| Posted: Tue Jan 20, 2009 11:58 am Post subject: mono-bungees |
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On Jan 20, 2009, at 11:40 AM, Trombley wrote:
| Quote: | Where and when shall we meet to take you up on your offer of a
beverage.
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Eric,
Well....that just takes the cake!...How about SnF 2009?
Your description is a keeper and will go into my special archive,
Thanks,
Fred
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raimo.toivio(at)rwm.fi
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| Posted: Wed Jan 21, 2009 3:52 am Post subject: mono-bungees |
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Hi Erich
Why did you changed your bungee?
Was it totally worn-out?
If so, how old it was and how many landings /flight hours about?
I just wanna estimate how far it will be my time to play bungee games.
Thanks, Raimo
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peterz(at)zutrasoft.com
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| Posted: Wed Jan 21, 2009 4:40 am Post subject: mono-bungees |
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a "from the peanut gallery" type of question:
Couldn't one use the old bungee to pull the new bungee around? (ie - tie the new bungee to the old bungee, then cut the old one and pull the new one through)
Apologies if I'm out of touch on this, as I have not yet read that portion of the builder manual.
Cheers,
Pete
A239
On Wed, Jan 21, 2009 at 6:54 AM, Raimo Toivio <raimo.toivio(at)rwm.fi (raimo.toivio(at)rwm.fi)> wrote:
[quote]--> Europa-List message posted by: "Raimo Toivio" <raimo.toivio(at)rwm.fi (raimo.toivio(at)rwm.fi)>
Hi Erich
Why did you changed your bungee?
Was it totally worn-out?
If so, how old it was and how many landings /flight hours about?
I just wanna estimate how far it will be my time to play bungee games.
Thanks, Raimo
---
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rlborger(at)mac.com
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| Posted: Wed Jan 21, 2009 5:18 am Post subject: mono-bungees |
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Pete,
No apologies necessary!
In order to do that, you'd have to connect the two without any sort of a knot. I doubt there is any way to get a knot between the LG frame and the firewall. I could just barely get the plain bungee through.
I can see how one could take the tire off the LG and take apart the LG damper mechanism and, working inside the tunnel, replace the bungee from behind. But is that really easier than just pulling the engine and firewall to accomplish the same task? Is there anyone who has attempted both (or either) and can comment?
Check six,
Bob Borger
On Wednesday, January 21, 2009, at 06:38AM, "Peter Zutrauen" <peterz(at)zutrasoft.com> wrote:
[quote]a "from the peanut gallery" type of question:
Couldn't one use the old bungee to pull the new bungee around? (ie - tie the
new bungee to the old bungee, then cut the old one and pull the new one
through)
Apologies if I'm out of touch on this, as I have not yet read that portion
of the builder manual.
Cheers,
Pete
A239
On Wed, Jan 21, 2009 at 6:54 AM, Raimo Toivio <raimo.toivio(at)rwm.fi> wrote:
>
>
> Hi Erich
>
> Why did you changed your bungee?
> Was it totally worn-out?
> If so, how old it was and how many landings /flight hours about?
> I just wanna estimate how far it will be my time to play bungee games.
>
> Thanks, Raimo
> ---
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fklein(at)orcasonline.com
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| Posted: Wed Jan 21, 2009 7:31 am Post subject: mono-bungees |
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On Jan 21, 2009, at 4:38 AM, Peter Zutrauen wrote:
| Quote: | Couldn't one use the old bungee to pull the new bungee around? (ie -
tie the new bungee to the old bungee, then cut the old one and pull
the new one through)
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Reasonable question Peter...
I raised this topic after installing the bungees as part of my
(original) build...I found myself four square in front of the LG
frame, flexing my muscles, and trying to imagine how on earth this
could be done w/ an engine in place...Eric explains how he's done
that, and I'm buying him a drink at SnF if we both make it there.
My concern stemmed from my efforts to adjust the final tension,
hopefully to achieve that smooth, easy, one-finger motion during
retraction which other posts have indicated is both possible and
desireable.
When I initially snugged the bungee, getting the 6 loops + the "start"
loop and the "finish" loop as per the diagram in the manual, I found
that I used just about the entire length of bungee. As I progressively
tightened the bungee, I found that I've ended up with about 6 feet of
extra cord, and have yet to achieve the "one-finger" retraction...and
man, those bungees are REALLY tight! Or at least they seem so.
With no other experience, how does this compare w/ that of
others?...jus curious.
Fred
A194
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grahamsingleton(at)btinte
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| Posted: Wed Jan 21, 2009 11:08 am Post subject: mono-bungees |
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Fred Klein wrote:
| Quote: |
When I initially snugged the bungee, getting the 6 loops + the "start"
loop and the "finish" loop as per the diagram in the manual, I found
that I used just about the entire length of bungee. As I progressively
tightened the bungee, I found that I've ended up with about 6 feet of
extra cord, and have yet to achieve the "one-finger" retraction...and
man, those bungees are REALLY tight! Or at least they seem so.
With no other experience, how does this compare w/ that of
others?...jus curious.
Fred
A194
Fred
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use ALL the bungee and tie it off where you can reach it with the engine in.
Graham
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rlborger(at)mac.com
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| Posted: Wed Jan 21, 2009 12:29 pm Post subject: mono-bungees |
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Graham,
Again: "we are two peoples divided by a common language."
And again, I seem to be bit in the nether areas as a result of instructions written such that multiple interpretations can be made. To quote the Europa Build Manual --
Chapter 29M: "Bungee cord
To assist the pilot in retracting the landing gear into the centre tunnel a bungee cord is used. The
bungee cord is looped under an anchor tube attached to the swinging arm and over the top horizontal
member of the landing gear mounting frame.
Tie one end of the bungee cord to the top horizontal member of the landing gear mounting frame with
two half hitch knots and, using three plastic cable ties, secure the short end below the knots to the rest
of the bungee. See figure 6. Thread the cord down under the anchor tube and back up and over the
upper member of the mounting frame. Repeat this until all the bungee has been used."
RLB commentary, this results in 6 loops around the frame.
Returning to the Europa Build Manual --
Chapter 29M: "Setting bungee tension
With the retraction lever in its down gate tension the bungee, adjusting each strand so they all have
equal tension, until the landing gear, complete with wheel assembly and with wings installed, can be
easily retracted and extended. It’s important when making these adjustments that the wings are
rigged so that the weight of the flaps is taken into consideration. In flight the flaps will not aid
retraction of the landing gear. Final adjustments can be made to ease retraction or extension as
preferred. The flaps will not help or hinder retraction or extension when in flight. See figure 7.
To secure the bungee at the required tension tie the remaining end, in the same manner as the other
end, to the top member of the landing gear mounting frame. Cut or tie off any excess bungee. "
RLB commentary continues, nowhere in the section is there any instruction to continue to wrap the bungee as you tighten. It just says to tighten and cut off the excess.
I'm not flaming you Graham, please don't read this that way. And I'm not saying that Graham's continued wrapping is incorrect. It may very well be correct. I'm just pointing out a serious issue with the build manual if his method is correct.
Unfortunately, this is not the first instance of build instructions which can be left open to divergent interpretations. And somehow, I seem to end up on the wrong end of said interpretation most times.
Europa-Aircraft Folks: PLEASE give your build manual a complete top to bottom, front to back going over. There needs to be considerably more detail in much of the manual. My nether regions have become much too tender to absorb continued chewing.
Check six,
Bob Borger
SOMEDAY, not sure just when, I WILL get my thrice completed but still not quite yet complete beastie into the air.
On Wednesday, January 21, 2009, at 01:07PM, "Graham Singleton" <grahamsingleton(at)btinternet.com> wrote:
| Quote: |
Fred Klein wrote:
>
> When I initially snugged the bungee, getting the 6 loops + the "start"
> loop and the "finish" loop as per the diagram in the manual, I found
> that I used just about the entire length of bungee. As I progressively
> tightened the bungee, I found that I've ended up with about 6 feet of
> extra cord, and have yet to achieve the "one-finger" retraction...and
> man, those bungees are REALLY tight! Or at least they seem so.
>
> With no other experience, how does this compare w/ that of
> others?...jus curious.
>
> Fred
> A194
Fred
use ALL the bungee and tie it off where you can reach it with the engine in.
Graham
|
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