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HelicopterBeginners Corner › Main blade help
06-05-2004 10:51 PM  13 years agoPost 1
paramedic

rrApprentice

Wichita, Kansas

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Can someone post a walkthrough for set up of new main blades. From out of the package to flight ready. I need to replace 550 woodies after a crash and I am not sure how the process of balancing, finishing, tracking, etc go about. I have not ordered the blades yet because I want to buy anything else I might need to set them up at the same time.

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06-06-2004 01:02 AM  13 years agoPost 2
Hughes500Pilot

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Anaheim, CA

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Here is the easy way...

1. Buy a set of V-Blades
2. Bolt them on your heli
3. Go fly.

Most better blades come pre-blanced.

Or, you can follow this "fast and dirty" way to balance your blades. This is a copy of a post I made a few months back...


To start, forget about blade weights for right now. The weight of the blades at this point in the process is not important!

The first step is to match the blade CG's (center of gravity). Push a razor blade into a scrap chunk of balsa wood. The sharp end goes into the balsa wood (you dont need the sharp end pointed up). Take one blade and lay it on the edge of the razor. Move the blade back and forth until it balances on the razor. Now make a small mark at the balance point. Repeat for the second blade.

Add tape to the tip of one blade and recheck the CG's. Keep adding tape to the same blade tip until the CG's are in the exact same place on both blades. That is the goal in the first step, to MATCH THE CG'S!

In the second step, use a good quality scale and weigh each blade. Add tape to the light blade until the weights are exactly the same. REMEMBER, YOU MUST ADD THE TAPE TO THE CENTER OF GRAVITY, NOT AT THE TIP OF THE BLADE. If you add the tape to the tip of the blade you will throw off the CG's.

Thats it. Now you are done.

-Steve

P.S. Please remember that this is the simple, first timer set of instructions. Once you become more advanced and you know what you are doing - you will want to pre-weigh the blades and then add tape to the lighter blade (tip or root) in order to bring the CG's closer. This way you are minimizing the amount of tape used to balance the blades. I left this out because it seems to confuse most new people. I also left out the part about "paralex error" when checking the blade CG point. I find that this too confuses most new people too.

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06-06-2004 02:12 AM  13 years agoPost 3
drsuessmn

rrVeteran

Ellendale Minnesota USA

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since you have a raptor if you decide to go with wood blades the TT blades generally come real close to balanced (at least they have for me) all you usually need to do is what hughes500 said to check cg and balance of blades they will usually be right on for a variation you can buy a blade balancer and this will eliminate the need for weighing blades because it basically is a fulcrum scale and if the blades weigh the same they will be level and to check cg you just lay one blade on the scale ksj makes a real good balancer and the instructions tell you well how to use it and how to find the proper balances the choice of course is up to you teh balancer is 50.00 from heliproz you may be able to find it cheaper at lhs I do not know this balancer also has a scale on it to allow you to get it balanced exactly right I had to add a strip of tape to mine so it was balanced level without anything on it (zeroing it out if you will) and has worked perfectly since


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06-06-2004 04:15 AM  13 years agoPost 4
paramedic

rrApprentice

Wichita, Kansas

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I dont have a raptor. Thank you both for the help and posting this info.

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06-06-2004 04:20 AM  13 years agoPost 5
drsuessmn

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Ellendale Minnesota USA

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What do you have?

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06-06-2004 09:10 AM  13 years agoPost 6
FENMAN

rrApprentice

CAMBS UK

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HI
I put rappy blades on my hawk and there was no problem at all
good balance and good tracking {if your root is the same,try a pair}

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06-06-2004 09:18 AM  13 years agoPost 7
paramedic

rrApprentice

Wichita, Kansas

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Venture 30

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06-18-2004 05:11 AM  13 years agoPost 8
Bobby Watts

rrVeteran

Orlando, FL

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TT Carbons

Put a set of Thunder Tiger carbons on it and re-check ur pitches both on top, middle, and bottom.

They are great blades for a great price.

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06-18-2004 06:11 PM  13 years agoPost 9
hmben

rrNovice

South Georgia

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I agree the TT woods blades are usually very close to balance and fly better than others I have tried. However, once you fly a set of TT carbons you'll never go back. They are great all around blades at an extemely good price. With that said, the extreme 3D pilots fly different blades, but that can be discussed when we get there.

And they said it couldn't be done!

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06-19-2004 05:08 AM  13 years agoPost 10
Jagboy69

rrKey Veteran

Miami

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Volkul has a great section on his website on how to setup any machine.. Check it out...
http://volkul.tripod.com/pages/tips/pitchgauge.htm

Jason /// Sceadu50/9chp WWW.Jagboy69.com

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06-23-2004 10:06 PM  13 years agoPost 11
paramedic

rrApprentice

Wichita, Kansas

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I think that I am really making this alot more complicated than it needs to be. I guess the first thing I need to do is epoxy the grips. I feel comfortable with this procedure after reading several books and posts here on RR. Then I will lay the blades off a edge or simular fulcrum point to find the CG and mark it. I will then add tape to make both CG's the same. The next part is where I get a little confused. I don't have a scale. I have read that I should bolt both blades together and suspend that over two glasses to see which way it tilts. My problem here is if I add tape to balance that, will I mess up what I balanced in the first step? This is not a complicated thing to do...balancing blades...but I have gathered too much info and now I am overthinking every part of it. Typical for me. Help please.

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06-23-2004 10:13 PM  13 years agoPost 12
Hughes500Pilot

rrKey Veteran

Anaheim, CA

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As I stated in my post above, the first step is to match the CG of both blades. They must be in the same spot!

Once you have the CG's in the same spot on each blade, then you need to make both blades weigh the same. But your asking yourself - If I add more tape to one blade, then the CG will change? Wrong. If you add tape on the CG of the blade, you can make the blade heavier without the CG moving. But you must add the tape to the CG.

-Steve

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06-23-2004 10:14 PM  13 years agoPost 13
paramedic

rrApprentice

Wichita, Kansas

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h?

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06-24-2004 01:12 AM  13 years agoPost 14
paramedic

rrApprentice

Wichita, Kansas

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Thanks Hughes500pilot.

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