AOPA Pilot Magazine - March 1958 - (Page 58) shhd of a spring-driver plunger which Why Should An Inspector Do Thb? it t a k an b p e h r , equippd with the best of precision gu aw to a & thE pin8 h t fit exactly. d T h w pwcha keep pins and the mating rod together; prok c t i I l g the p h until they m& b 1 a m b l y . Thb i just one s more Airwork p c e d m that helps produce a longer 1a&g trouble-fm engine. For fhe light plane pllot. Mensures check point t check +ni e timp or s p e d dir e l y m s&'ional or WAC chatla. Also measures distance end di?adimas other plotters do. Heavy bnincatd vinyl construdion. Over 100 seclional chart milas beg. Sand $2.50 o orhr C,Q.D. TIME r 5llCKS, h p t . A-1, Box 9185, Far! Worth, Toxm. YORK AIRPOET TMOMASVILLE, PENNA. Tdapheam Ymrk, Pa,5801 PIPER W & SERVIGE S pmdxatas substandard fab* and canma swirling tracks on brittle dop. The advnnhm of tbis portable tefhr, now man&actured by S b l C i k T a b irig Machin-, I m , of Deboit, Mich., is t h ~ it d a e ~not &maw airworthy t fabric or dope. As we've aid before, i you're not f satisfled with tihe de.cision o the mef chanic, probably made with the assis& an# of one of these portable testers, there i a an dbrfiative. Scdtered about the country are priv a h testing laboratories to which you m a y e n d a fabric wedmen for an accurate k L The United S h b a Testing Compauy, whose main &ce b at Ew b k m , N J., Mls mi that, the liat price . o f the strer~&h b s t fa $10 per ample. You should submit to them a 6 by 1% inch Wt specimen cut from the area t o be hated, making certain that the cut is parallel tu the threads of the fabric. Testing laborahrim m e a pendulumtype k t e z such as the Scott or S u k . The dope is removed, and whali cannot be peeled off is dbmlmd by aceton& The sample 4s pre-dried for 16 miuu k at 1 6 and &en subjected for at 2' leaat four h o w t a standard a w s a phere of TO0 F a d 65% relative humidity. strip^ 6 by 1% inches are than cut -five spechens are prepared for warp and filling. These pieces are inserted carefully i n b damps and subjected h u n 8 m bsion. CAA reguhtion~& not qmeify the number of m p l e s to be but because of the probabflitr of strength variation on a given sudace, m u d y it is remmmended that a t least three samples l bbt~ m If reriults-of a fabric test by a cextified labratory are ~ e t w m dwith a reading above the t n j n ~ u m required hy speciiication~,t e mechanic must give h h5a okay on fabric strength, the CAA stateu M . Vollm6cke emphasizes howr ever, that there will be "othm fa&m relative to the mndi%on of the doped mrface or the- covering attachment means that could influence whether or not the fabric inatdhtion i8 i &n worbhy condition.'' W & that's the story. But if your e fab* p a w the pat, it'a &ain you'd like to keep it iu good s b p h What can you do? Two deadly e n d m o f f~brie according ta manufacturers a m d l d m and ult~+vioht light, In h d d climates it is b a d k~ ~ e n mildew, p t for w h k v e r inhibib mildew i s likely b attack dope. ~ ~ m i n mwrit fig^ ktra-violet. n owa aver, b t probction against sun and weather 5s t keep an sirplane a h a n g a d or m e r e d . A h r n a k ~ wetting and dryiug of t e fabric, contraction h and dpansivn, c a d temperature changes, set up w&esse% Bemuw melting and freezing of ice i s vary deshuctive, keep the snow and ice off with a prOhtbi~8cover if your plane mwt be kept outside. And h d ~ , remember that a high polish rea& heat; a dull h i s h absorbs i Abwe all, keap yow fabric dmn t and keep a e &ish polished. XNIJ &' THE AOPA PILOT
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