Q - American Bonanza Society

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Bottle jack and the base and roil tools are used to push the windshield pastthe hat section of the structural frame with a great amount of control.Weakened windshield installation, caused by having the rivets installed too close.It is extemely important to mention atthis point that many windshields and front sidewindows (framed or not) have been overtrimmedby inexperienced installers whoundoubtedly held them up to the hat sectionstructural frame and eyeballed a trim line thatwould allow the window to easily slide post thehot section and seat into the structural frame.The unfortunate result is a window that istoe small to have the proper distance betweenthe mounting holes and the edge of thePlexiglas or retaining frome, with rivets barelysecuring the window in the metal frame. (Ihave seen this many times in my 30-plusyears in business.) As this is a fairly commonproblem in oftermorket installations, it's agoed idea on a prepurchase inspection to pullthe window frames and have a look.Also, even when the metal window edgeretainer frame is over-trimmed, point is oftenscraped off the hot section during installation,proef of just how tightly these windows fit. Thephoto tells all: on over-trimmed window andstill tots of miSSing point.I've hod about all of the window businesst can stand for th,s issue. And we're at agood technical breaking point anyway. We willcontinue next month with final trimming, fit-ting and installation of both framed andunframed windshields and forward side glass.We will also get to those bock windows.Don't worry, it doesn't involve nearly as muchtechnical information or as many installationwoes. Most of the hard part is behind us.ABS member Dennis Wolter started Air Mod in 1973to bring innovative design and high qualify renova·tions to the general aviation market. Dennis, his wifeCynthia and 10 dedicated employees completeabout 40 renovations each year at their facility onthe east side of Cincinnati. Dennis has a degree inindustrial design from the University of Cincinnati.He is an A&P. JA and a 3,OOO·hour instrument pilot.DATENov. 5-7Jan. 21-23LOCATIONNorfolk, VirginioPhoenix, ArizonaBPPPSCHEDULEAIRPORT April 15-17 Fresno, California FATORFDVTMay 13-15June 10-12Columbus, OhioCMHColorado Springs, Colorado COSFeb. 4-6 Melbourne, FloridaMLB <strong>Bonanza</strong>s/Barons/Travel Airs at all locations. SubjectMarch 18-20 San Antonio, TexasSATto change. Cockpit Companion course availableeverywhere.April 1-3 Greensboro. North Carolina GSO CALL THE BPPP REGISTRATION OFFICE TO MAKEARRANGEMENTS: 970-377-1877 or fax 970-377-1512.Page 8711 www.bonanza.org ABS November 2004
GROSS WEIGHT INCREASESHow to safely (and legally) carry more in your airplaneBY GEORGE WILHELMSEN. MORRIS. ILLINOISave you ever found yourplane is just short of whatyou need? For example.let's say you want to take atrip in the <strong>Bonanza</strong> outwest to ski with your wifeand two kids. It will be asimple trip. one that you have taken foryears while the kids were grow ing up.Now that your daughter is nearlycollege age. you see this as potentiallyone of the last vacations you will beable to take as a family before shedeparts and starts her own life.As you always do. you take thetime to figure out the weight and balance.You calculate your own slightlyincreased weight, along with that of yourwife and children, and then take intoaccount the amount of fuel needed. Onceyou finish this exercise, you find thateven if you skimp on fuel. you don 'thave enough margin to accommodateeven a reasonable amount of baggage.You have hit the "Gross WeightWall"- the point at which your aircraftis no longer capable of carrying yourfamily and their travel needs withenough fuel to get you where you wantto go. Your choices are: Take out a loanand buy a plane with the capacity tohold your family and all their goodies.or look for ways to increase your aircraft'smaximum gross weight.Several firms have actively workedto increase the maximum gross weightof Beech aircraft. The increases vary bymodel, but they are FAA-approved, andwhen installed and documented with theright STC. can actually allow moreweight than it was originally designedto carry.This may sound like a dream cometrue, since such options can increaseyour useful load. But it is important toread the fi ne print and understand thedetails before you sign on the dottedline.The most frequent ly asked questionabout increasing gross weight revolvesaround the regulations for the orig inalproduction. The argument goes somethinglike this: "Given the stringentdesign requirements that are pall ofbui lding a certified aircraft. how can anaftermarket person come up with a modthat allows the gross weight of my planeto be increased' "The answer: Aftermarket folks puttheir gear through stringent testi ng. andthey proved that it would do what it wasintended to do.Testing, testing, 1-2-3 ...I' ve had the opportunity to lookover testing equipment used by vendorsas they tested aircraft for gross weightincreases (GWI). Due to the proprietarynature of the testing, I can't go intomuch on the specifics. But in one case,I saw a rig that allowed the airplane tobe lifted several feet off the floor. andthen, believe it or not, dropped to theconcrete floor. This test is designed toverify that when it is loaded to the newgross weight, the structure of the airplanecan handle the load by si mulati nga hard landing.In this test. the aircraft was instrumentedup so that the various loads onthe st ructure can be measured.Afterwards. the various access panelsare removed and the aircraft is inspectedto verify that nothing broke or fa ileddue to the increased load. It alsoincludes FAA oversight and post-testreview, looking for any structures thatmight have been stressed, or even overstressed.Vendors want to do the drop testingfirst for a simple reason: If the airplanefails 10 handle the weight on a simulatedhard landing. the FAA won't approvethe increase.Once the drop testing is completedand approved, the vendor has to gothrough a flight test. While this varieswith the FAA FSDO, it usually includesflight at both ends of the center-of-grav-Velldors lI'allT 10 do Ihe drop In/illg fir.11 Fl!' a .lillll'le rmlOIl: If Ihe airpilinefaihlD halldle Ihe weighl Oil a .Iilllllialed hard landillg, Ihe ['·\A 1\'011 't a!,!,IVI'l'the illcrea\t'.ABS November 2004www.bonanzo.org Page 8712
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Q - American Bonanza Society

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