#1
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Estes- New A Helicopter Model just Announced
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#2
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John, that is cool! Give Apogee some competition there. When will these be available?
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Bernard Cawley NAR 89040 L1 - Life Member SAM 0061 AMA 42160 KG7AIE |
#3
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Quote:
March.
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-Wolfram v. Kiparski NAR 28643 - TRA 15520 MTMA Section #606 President |
#4
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Quote:
Definitely on my list. The dark art of helicopter recovery has always been shrouded in mystery for me. Then again, so has the dark art of hitting the bowl, yet I persist.
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Bill Eichelberger NAR 79563 http://wallyum.blogspot.com/ I miss being SAM 0058 Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Gee'Hod, Shrike, SST Shuttle In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Solar Sailer II Semroc Cyber III Ready to fly: Estes - Multi-Roc, Solar Sailer II Semroc - Earmark, Snake Jumper |
#5
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John,
Very cool! If you're allowed, could you post some pictures of the hub. Are the blades set at a fixed angle? Also, why was this fun to design? Steve |
#6
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It looks like the hinge/hub is made from laser cut fiberboard - you can the parts in the photo on Estes website. Along with what appears to be a jig for setting the blade angles and...a tube cutting guide? The yellow gizmo in the center of the parts collection photo looks like one...
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#7
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The blades are glued to the fiber hinge at a 90 degree angle. You set the blade pitch or what ever you wish to call it with a set of three jigs.
Attached is an image of the blade jigs in use and a close up of the hub. Quote:
Helicopter and Glide recovery models are my two favorite types of models. John Boren |
#8
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Thank you for coming out with this FAI-type heli-roc kit, John! This configuration is also popular in Europe (and in FAI-CIAM spacemodeling competition countries elsewhere in the world), and it might even become the "Renger Sky Slash of the heli-roc field," in its total impulse category.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
#9
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Does this use a burn string to retain the blades for launch? The diagram Mr. Boren posted appears to show some kind of sleeve that I assume would slide upwards when the recovery charge goes off which implies a catch of some kind to hold the rotors down. Either way I’m intrigued - should be a fun build and a fun flyer.
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#10
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Quote:
With today's laser-cut sheet balsa (and laser-cut basswood, fiber [beveridge board], and even thin modeling plywood sheet parts), and molded plastic "fulcrum" or interface parts such as rotor hubs, hinges, and motor pod lug/hooks, it is now possible to produce helicopter, B/G, and RG kits that are relatively easy to build and reliable to operate, compared with such kits of a generation ago. Back then, many of these parts had to be cut, shaped, and size-matched by the builder, which made the models tricky to build and more likely to fail in flight. One early (1973) step in the direction of today's kits was Centuri's Hummingbird boost-glider (see: http://www.ninfinger.org/rockets/no...a/73cen70e.html ), which had all-die-cut fiber wings and tail surfaces.
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see: http://www.lulu.com/content/paperba...an-form/8075185 http://www.lulu.com/product/cd/what...of-2%29/6122050 http://www.lulu.com/product/cd/what...of-2%29/6126511 All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com. NAR #54895 SR |
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