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  1. D

    silicone vac bag for infusion

    I have recently made silicone bags for some of my molds using airtech quart kits and using the flashbreaker tape in the bag then use bagging sealant to seal to mold. Has anybody used any other method to seal the silicone bag to the mold without using the tape and sealant?? I am trying to keep...
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    Question for you infusion experts.

    Recently i tried to infuse a set of hydraulic wheel skis out of carbon uni with very poor results. The layup was 5 layers of 9 oz uni aeropspace grade they where 4 in a quad layup with one extra layer running length wise the ski with a 6 oz twill on the surface as a decorative layer which would...
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    graphite/carbon corrosion on rivits for fastners???

    I am working on a helio courier of mine and have built new interior and door panels which were are fiberglass built in the mid 50s. I have made new panels out carbon with a layer of glass where they touch the aluminum skin. I used graphite for weight savings and i am also clear coating them for...
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    choke in aircraft cylinders????

    I understand they theory behind choke in lyc/cont. cylinders but why does it vary so much?? why did they used to be all straight bore like the rest of the internal combustion air cooled world, who got it right aircraft or air compressors???? i have seen air compressor run much longer than any...
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    UV Barrier in mold on clear carbon fiber

    There is a great demand on clear carbon parts people really like the looks of it. Is there any process of spraying a clear coat uv in the mold and layup and infuse on top of it with epoxy??? the old way of using a automotive clear after the part is cured is very time consuming for me. Maybe i...
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    secondary bonding prepregs

    Where can one obtain the info on proper methods and adhesives for bonding cured prepreg parts. I understand there are many different resins used which may change what is used to bond the parts but is this a standard practice with prepregs???? perhaps if a prepreg is available that can be...
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    hot box rivits

    I am getting ready to rivet some skins down on a metal wing project and was planning on using some hot box rivits.There are some areas that will be hard to reach to buck. I already have a small high temp oven capable to achieve the 920F temp accurately. From what research i have done it calls...
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    Vesta props.

    DOes anybody have any opinion or experience with vesta props and hubs. Was considering there 3-blade ht cut down to 98" for a exp. helio courier maybe use there electric control to have beta available on floats. Engine would be geared lycoming 300hp. Maybe just stick with hydraulic CS. Any...
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    PTMW Epoxies

    Does anybody have any experience with these epoxies? I am looking at building some molds with there pt1154 tooling epoxy gel and infusing with there pt2712 resin. Trying to get away from VE and poly tooling. Is there a better product out there??
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    max tg with pre preg

    What is the max tg for most pre pregs and how available are they to the common builder. Can they be used if a large oven is available to cure?
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    where to find metal lift strut data ????????

    I was wondering if anybody has any info on where to find some data for the lift struts used on piper type aircraft pa-18-12-ect. I have asked univair and airframes inc who both build them and they said they never did any testing, i find that hard to believe. I was looking for the design tension...
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    composite fuel tank vs aluminum tank

    I need to build some tanks for my cub type bush plane. The wing is all graphite with a tank shelf for tank to sit, it will hold 23 gal. approx. and the top of the tank will be the tp surface of that portion of the wing,( to save the weight of a cover). What is gonna be the lightest end result...
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    foam choices and method of cutting

    I am looking to build some leading edge slats for my bush plane and would like to use rutan method , I have hotwired out a proto type out of polystyrene and covered with graphite and was impressed with the results. However i would like to use a foam that is structural and fuel resistant. I need...
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    choices for epoxy for cowling

    I am getting ready to build a spinner,cowling,boot cowl wing tip ect. out of graphite and putting a clear polyurethane over it for uv protection. What would the best choice of resin to use for these componants? i am in alaska so 75 degree ambient is all i will see but in the sun i may get near...
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