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s.c.richards(at)homecall.
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 Posted: Tue Nov 28, 2006 3:38 am Post subject: Crack in 601HD firewall stiffner 6F8-2 |
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Hi list we have found a crack in the firewall stiffner near the port engine mount and have had to replace the stiffner
We beleave this may be because we are using a Continental 0-200 & a header tank so are on a fairley forward C of G. Have any of you with this combination had any problems ?
We have difficulty in Just lowering the nose on landing, it tends to want to drop when you remove the power. It is possably caused because to much we trimmed off the stiffner to fit the original faulty engine mount.
We found this when changing the nose wheel bungey which was fraid at the bottom tube and started to shed rubber.
We have done a lot of tuch & goes try to perfect our landings
Clive Richards
GCBDG 52 Hrs Estimated 250 T&G / Landings
[quote][b]
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planejim(at)bellsouth.net
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| Posted: Tue Nov 28, 2006 5:14 am Post subject: Crack in 601HD firewall stiffner 6F8-2 |
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Clive,
If I remember correctly, Art Mitchell had this problem with early 601HDs used for training. ( Lots of landings). I think he was using Rotax engines though. The fix was a "L" stiffner riveted on to each end of 6F8-2 along the diaginal edges. I heard of this and added the stiffners before ever flying my HD. (1996) I now have 745 landings and 536 hours. Even with the Rotax 912UL I find that I need to keep much UP elevator just at touch-down to keep the nose wheel from dropping down fairly hard. I have found that the slower you get the airplane just before the mains touch, the less tendency to bang the nose down. In other words, slow it down on landing. I keep reminding myself and now make very consistant and SOFT landings.
Jim Hoak 912UL - 536 hrs - 745 landings
[quote] ---
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Gig Giacona
Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA
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| Posted: Tue Nov 28, 2006 8:40 am Post subject: Re: Crack in 601HD firewall stiffner 6F8-2 |
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Any way we can get a photo of the crack? I'd like to make sure I know exactly where it is developing.
[quote="s.c.richards(at)homecall."]Hi list we have found a crack in the firewall stiffner near the port engine mount and have had to replace the stiffner
We beleave this may be because we are using a Continental 0-200 & a header tank so are on a fairley forward C of G. Have any of you with this combination had any problems ?
We have difficulty in Just lowering the nose on landing, it tends to want to drop when you remove the power. It is possably caused because to much we trimmed off the stiffner to fit the original faulty engine mount.
We found this when changing the nose wheel bungey which was fraid at the bottom tube and started to shed rubber.
We have done a lot of tuch & goes try to perfect our landings
� Clive Richards
GCBDG 52 Hrs Estimated 250 T&G / Landings
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_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR |
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s.c.richards(at)homecall.
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| Posted: Fri Dec 01, 2006 2:05 pm Post subject: Crack in 601HD firewall stiffner 6F8-2 |
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Gig
Photos attached as requested showing position of crack & cracked end with
stiffener removed. The piece which broke off is not to hand.
We have replaced stiffener but left end wider over engine mount and taken
strengthening angle above across full width of fire wall.
Clive
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Gig Giacona
Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA
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| Posted: Fri Dec 01, 2006 2:30 pm Post subject: Re: Crack in 601HD firewall stiffner 6F8-2 |
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Thanks for the photos. The earlier poster was right the XL has beefed that area up some But it will go on my list of places to watch anyway.
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W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR |
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