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N1BZRich(at)aol.com
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 Posted: Fri Mar 19, 2010 5:50 am Post subject: spar/gear bracket |
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Hi Malcolm,
Good input and photos. Let me add just one more thought to this discussion, and that is gross weights. I fear that some Esqual flyers may be exceeding the max take off weights that were specified. And notice I said weights (plural). Two numbers have been specified as the max gross weight for the Esqual, 992 pounds (or 450 kg) and 1250 pounds (560 kg). The 992 pounds comes from the current web site for the Esqual. The 1250 was what was listed for the one I built (serial number E180070). So there may be some confusion out there, especially if the current flyer is not the original builder. Flying on a rough field (like Malcolm mentioned) with too high a gross weight could certainly result in the problem seen in the photos Malcolm sent.
Blue Skies,
Buz
In a message dated 3/19/2010 5:59:07 A.M. Eastern Daylight Time, malannx(at)bigpond.com writes:
| Quote: | Have followed the posts on the failure of the central ladder beam with interest. I have posted photos of the fix for an Esqual with a chrome moly frame. I won't identify the owner but the fix is from a certified aircraft welder.
The damage was caused by operating out of an extemely rough grass strip and I would surmise the damage was done taxying, not heavy landings. This plane was the catalyst for the "Alerts" section on the http://www.esqual.se/ website. I have landed on that airfield once and I was concerned that the nose leg would stay intact till I finished taxying. I have the flat plate spring steel undercarriage legs which seem indestructible but I have the square carbon fibre nose leg. I have always worried about it. It has no flex in it, unlike alloy nose legs.
Some time ago an Esqual was stalled in from a considerable height(an incipient spin had developed) The usual bits on the front of the aircraft were wrecked and some wing leading edge damage but the central ladder/spars remained undamaged. The pilot had a sore back. I reckon the design of the Lightning/Esqual is very strong in that area.
Takeoffs are optional, landings mandatory. "Green Landings" 
Malcolm Ferguson
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