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HomeAircraftHelicopterHelicopter Main Discussion › Manufacturer blades
02-10-2008 02:21 PM  10 years agoPost 1
switch blade

rrApprentice

Florida

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Hello

Anyone seen how they manufacture heli wood blades ?

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02-10-2008 02:30 PM  10 years agoPost 2
hootowl

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Garnet Valley, Pa.

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Wolves don't lose sleep over the opinions of sheep

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02-10-2008 03:12 PM  10 years agoPost 3
BOOGIE

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LAFAYETTE LA

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Is that how they do that?

MSH USA / Lynx Heli Innovations

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02-10-2008 03:36 PM  10 years agoPost 4
shlm

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West Chester, PA

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Hootowl,

You going to be bolting them onto your BW Status?




Steven B.

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02-10-2008 03:42 PM  10 years agoPost 5
hootowl

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Garnet Valley, Pa.

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Those are going to be Hoot Specials

Wolves don't lose sleep over the opinions of sheep

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02-10-2008 03:45 PM  10 years agoPost 6
GRINCHMAN

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IL

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They must use a lot of sandpaper.

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02-10-2008 04:03 PM  10 years agoPost 7
hootowl

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Garnet Valley, Pa.

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Not to worry, just got my Koll Pro Rotor blade balancer

Wolves don't lose sleep over the opinions of sheep

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02-10-2008 07:26 PM  10 years agoPost 8
legoman67

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Nanoose Bay B.C, Canada

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it depends on the blade, some are made like plank wings, with shrink material, others like the clear ones from tt are sick some 2x4..LOL

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02-10-2008 09:14 PM  10 years agoPost 9
cmsilvoy

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Durham, NC

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Pretty sure it's done with a combination of CNC machining and planing followed by some hand weighing and matching.......

Chris

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02-10-2008 10:41 PM  10 years agoPost 10
dkshema

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Cedar Rapids, IA

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Augusto's secret is out. He's waiting for his shipment of handmade wood blades before he can ship out his Aurora kits.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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02-11-2008 12:04 AM  10 years agoPost 11
Nick Jones

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anderson

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I think 3 out of 4 threads, end up bashing the aurora...

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02-11-2008 12:31 AM  10 years agoPost 12
antja

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Levin new zealand

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This is how you make glass blades still trying to get it right for weight and balance though.

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02-11-2008 02:55 AM  10 years agoPost 13
oldfart

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Vancouver, Canada

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There is a lot more to any blade - wood or composite then airfoil and balancing - that is why there are great blades and bad blades and anything in between - with woodies or composites.

Making good woodies (and I have tested some that were actually better then some composites) is very time consuming, because they would consist of layers of many different woods (of varying densities, with the heavier density wood at the leading edge and a very light contest grade at the trailing edge, with the others in between). These layers of the proper woods can make the blade more rigid then many composites.

These multi-layered wood planks could then be CNC milled to the proper airfoil shape chosen. The airfoil chosen is very important, as there are some airfoils that work very well on a wing that flies at the varying airspeed from root to tip of our R/C helis (very different speeds then full scale ones) and others that actually become relatively unstable!

Next would be to install the right amount of weights in the blade, at the optimum location, so that the blade is not overly stable or not too unstable, relative to the flight profile one is designing them for.

This is just the general considerations. It is not as simple as most think, that is why over the past 10 years, we have seen so many new and relatively inexpensive brands of blades get manufactured in Asia and similar countries, that have not remained on the market past the sell out of their first production run.

Understanding how to mold composites, mill wood properly or balance blades, are the easiest skills to learn in making any rotor blade.

On the other hand, understanding and manipulating the intimate relationships between airfoils, relative center of lift of rotating wings, chord wise and span wise balance etc. are just as important, but far less understood.

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02-11-2008 04:06 AM  10 years agoPost 14
Invrted1

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Cincinnati, Ohio

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These layers of the proper woods can make the blade more rigid then many composites
I second that. I just got a set of woodies that came with my latest heli and I swear these things are every bit as rigid as the carbons I compared to side by side.

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02-11-2008 05:02 AM  10 years agoPost 15
David Blain

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Mt. Dora, Florida (USA)

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HOOTOWL-
Gee I didn't know they used such precision tools! I thought it would have been "less" precise..... LOL

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02-11-2008 01:55 PM  10 years agoPost 16
Vance

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York ,PA

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Antja- I'll take a set of those "BERP" blades in 600's please.
Vince D

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02-11-2008 07:32 PM  10 years agoPost 17
antja

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Levin new zealand

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still working through a couple of weight problems at the moment,
only getting time to work on them between laying up fuselages.

Tony.

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02-12-2008 06:30 AM  10 years agoPost 18
bellecrank

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Canada

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Antja

Many years ago a big company (Vario) made composite berp blades, and a lot of people jumped on the wagon initially. They discontinued them after one season.

Check the "berp" design on full scale helis. They are designed around the perameters of tip speed that are close to the speed of sound (we operate at much lower tip speeds) and at much different reynold numbers.

Consequently we learned that different airfoils where better for our use.

Are you making the blades for a scale model that uses them?

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02-12-2008 08:44 AM  10 years agoPost 19
antja

rrVeteran

Levin new zealand

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Yes a scale agusta EH101 1 -12 scale really just want to make it
look right.
Tony.

.

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02-12-2008 05:10 PM  10 years agoPost 20
oldfart

rrProfessor

Vancouver, Canada

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Antja

Wow that really looks nice - That looks like an OF head with OF blades. Have you flown that head yet? If so how did you find it in FFF?

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