----- Original Message ----- From: "Edwin Wilson" <[EMAIL PROTECTED]> To: "Gordy Stahl" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Cc: "Jack Strother" <[EMAIL PROTECTED]>; "Jim Deck" <[EMAIL PROTECTED]> Sent: Monday, July 28, 2003 2:47 PM Subject: Post on exchange is not showing up
> I sent this out yesterday (27th) in the am and it has never shown up. > Since what you post shows up will you pass this along to the exchange. > > From Edwin Wilson > LSF Vice President > I flew a BOT ARF at the Nat's on Saturday and it blew off it's right > wing on the first launch. I was barely tapping the winch when the wing > blew off. Full right rudder and full down stopped the death spiral and I > was able to pull it out and "fly" it across the field only to cartwheel > on the ground and crack the fuselage in several places. > I had modified the wing with spoilers and had put two JR-341s in the > nose and a 90degree bellcrank in the tail like the original BOT had. The > plane flew well and I was able to thermal several times the previous > Sunday. I liked what I had and thought it was a bargan. > The postmortem Saturday showed the outer spar box split apart. There was > a piece of plywood on the front of the joiner box BUT BALSA on the rear. > This is not visiable as it is under the wing sheeting. The wings shear > web is balsa but it is only on the rear of the spar and the grain is > horzontial NOT VERTICAL. IT did not take a rocket scientist to see that > the balsa failed in the joiner box and split lenghwise down the shear > web wood. > I recommend taking all the covering off the bottom of the wing and > backing up the sheer web balsa with at least 1/64 ply and something more > substantial in the joiner box wher the outer wing plugs in. Their were > two other BOTs at the Nat's and one creased the center section launching > on a high start the evening before the RES contest. The third one wisely > stayed in the car after seeing what happen to its brothers. > I wonder how much testing was done before this plane was released. This > is a heads up to everyone to inspect the wing spar before flying. > EW > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
