Defiant MKII
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From: Fort Scott, KS,
Here's a few pictures of my Defiant MKII. I've been working on this mold plug for the last 3 or 4 months. It still needs a little work but the molds should be done sometime this month. Hopefully I'll have one flying by June or July.
Todd Schmidt
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From: Fort Scott, KS,
Thanks guys for you comments!
Hey Bian, good to hear from you, Still have a lot of work to do, might have one by NATS time. . . but probably not enough air time for proper set up. I'm looking forward to see how this one will compare to the current design I'm flying.
Todd
Hey Bian, good to hear from you, Still have a lot of work to do, might have one by NATS time. . . but probably not enough air time for proper set up. I'm looking forward to see how this one will compare to the current design I'm flying.
Todd
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From: Fort Scott, KS,
The plug is ready to make a mold of. A few pictures of the parting plane for the first half of the main fuselage mold, and the main fuselage fitted into the parting plane. This is where you conclude you have a straight fuselage. Happy to say the fuselage centerline is dead on from the nosering back to the tail post. Now its time to wax/polish the plug to a class A finish and putty it into the parting plane.
After that, HOURS of back breakin fun begin!!
After that, HOURS of back breakin fun begin!!
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From: Fort Scott, KS,
A few pics of the first half of mold construction.
1. A surface coat was put down first, which is a thick epoxy based paste I tinted green. Dark colors help you see air pockets when making parts. The surface coat provides a inside mold surface that is slick, shinny, and almost ceramic like.
2&3. First half of the mold removed from the parting plate. Now its time to wax and polish the flange in preparation of making the second half.
Todd
1. A surface coat was put down first, which is a thick epoxy based paste I tinted green. Dark colors help you see air pockets when making parts. The surface coat provides a inside mold surface that is slick, shinny, and almost ceramic like.
2&3. First half of the mold removed from the parting plate. Now its time to wax and polish the flange in preparation of making the second half.
Todd
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From: Fort Scott, KS,
Hi Derek,
Thanks for your comments,
The plug is made from balsa and polyurathane foam. The plug started as a main box framed from balsa (front end of the canopy hatch to the tail post) The nose, fin, canopy, chin, top and bottom decks were shaped from poylurathane foam. All was glassed then primed with a catalyzed polyester primer.
I've completed first half molds on all three parts, hopefully be done building molds by next weekend. I'll keep the pics coming as the project progresses.
Thanks,
Todd
Thanks for your comments,
The plug is made from balsa and polyurathane foam. The plug started as a main box framed from balsa (front end of the canopy hatch to the tail post) The nose, fin, canopy, chin, top and bottom decks were shaped from poylurathane foam. All was glassed then primed with a catalyzed polyester primer.
I've completed first half molds on all three parts, hopefully be done building molds by next weekend. I'll keep the pics coming as the project progresses.
Thanks,
Todd
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From: Fort Scott, KS,
Well, after about 30 hours and 3 gallon of epoxy the molds are finally done!!
They came out really good. It's time to wax these puppies up and make an airplane!!
Todd Schmidt
They came out really good. It's time to wax these puppies up and make an airplane!!Todd Schmidt
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From: Wrexham, UNITED KINGDOM
Hi Todd,
yes it is a very nice plug and mold you have build here! Thanks to share your work on the forum with these beautiful pictures.
Regards
Guillaume
yes it is a very nice plug and mold you have build here! Thanks to share your work on the forum with these beautiful pictures.
Regards
Guillaume
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From: Wrexham, UNITED KINGDOM
Hi Todd,
nice job! I have just one question: what is the purpose of the foam? it will stiffen the fuselage but particularly in the middle, do you think this foam will be not weared with the time? Will you lay a glass cloth on this foam?
Thanks for your answer.
Guillaume
nice job! I have just one question: what is the purpose of the foam? it will stiffen the fuselage but particularly in the middle, do you think this foam will be not weared with the time? Will you lay a glass cloth on this foam?
Thanks for your answer.
Guillaume
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From: Fort Scott, KS,
Hi Guillaume,
The foam serves as a stiffner and viber dampening. There is a layer of .75oz cloth over the foam which will protect it wear and increases its rigidity. The Defiant I fly now is layed up like this and has three seasons on it and is still in very good condition.
I'll post pics of the fuse once its out of the mold, everyone will see it's not going to be the pretty white fuselage like the ones produced by kit manufacturers. I didn't prime in the mold so this fuselage will be carbon black and kevlar gold.
Todd
The foam serves as a stiffner and viber dampening. There is a layer of .75oz cloth over the foam which will protect it wear and increases its rigidity. The Defiant I fly now is layed up like this and has three seasons on it and is still in very good condition.
I'll post pics of the fuse once its out of the mold, everyone will see it's not going to be the pretty white fuselage like the ones produced by kit manufacturers. I didn't prime in the mold so this fuselage will be carbon black and kevlar gold.
Todd
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From: Wrexham, UNITED KINGDOM
Thanks for your precise reply, it is a really good idea to use foam to limit vibrations, thus improving the life of your aircrafts.
I'm very impatient to see the following photos.
Regards
Guillaume
I'm very impatient to see the following photos.
Regards
Guillaume
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From: Fort Scott, KS,
Okay, here's pics of the first fuselage out of the molds. It's not a pretty white one like you get in todays kits, but you can see what materials were used and where. I have a fellow who kits classic/ vintage pattern kits giving me info on how he makes white fuselages, so hopefully the future layups will look better.
Todd Schmidt
Todd Schmidt




