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HomeAircraftHelicopterThunder TigerRAPTOR 50 › How to add weight to the tail for balance (safely)
04-30-2010 09:57 PM  8 years agoPost 1
aadams1278

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Wilson, NC - USA

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I need to add about 11 grams to the tail of my raptor 50 in order to bring the balance in just perfect with a half tank of gas. i thought it was tail heavy and it would be easy to add weight to the radio shelf, but it turns out that it's nose heavy and needs weight on the tail...only problem is...WHERE do i put weight, and what kind of weight?

I have carbon tail blades, and carbon tail fin, so i guess it's possible that's why the tail is lighter now. I don't want to mount any weight on there with adhesive since it may come off and hit a blade or something, so i want to secure it down somehow. the only thought i have is to add a bunch of washers on the outside of the bolts that hold the vertical tail fin on. the only problem with that is it would take a bunch of washers to add up to 11 grams.

Any tips?

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04-30-2010 10:02 PM  8 years agoPost 2
aussie_g

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Travelers Rest, South Carolina, USA

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Best way is to lighten the front...

What electronics are installed??

Lighter battery, micro throttle servo, lighter canopy...

Gareth

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04-30-2010 10:13 PM  8 years agoPost 3
aadams1278

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Wilson, NC - USA

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ar7000 rx
JR Sanyo 4.8v nimh battery (AAsize)
ATG V3 Governor
4x Hitec 5625mg servos
boom mounted tail servo s9254 and gy401

not much i can do to lighten the load up front. i've got everything neatly arranged as far back as possible on the tray. i guess i COULD lighten the battery by getting a lipo or something, but i don't do ANYTHING with lipos so i'd rather not do that. i don't have a charger for them or anything.

canopy already has holes cut in it for better airflow (plastic stock canopy)

and i guess a throttle servo would be an option...

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04-30-2010 10:53 PM  8 years agoPost 4
hornet dave

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Cedar Rapids, IA USA

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fiberglass canopy.

To mount lead, get the standard hobby stick-on lead weights from the LHS. each square is 7 grams. Pull off the double stick adhesive, drill a hole through the middle, and bolt it up to the tailfin using the fin mounting bolts.

Or, just stick on the adhesive lead onto the boom and wrap it a bunch with electrical tape.

I got a fever! The only prescription is MORE 6HV

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04-30-2010 11:17 PM  8 years agoPost 5
nivlek

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Norfolk England

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Tail boom mounted tail servo ?

At the end of the day , it gets dark .

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04-30-2010 11:40 PM  8 years agoPost 6
ESWLFSE

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Liberty Hill, TX

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Tail boom mounted tail servo ?
Sweet. Move it back.

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05-01-2010 12:10 AM  8 years agoPost 7
aadams1278

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Wilson, NC - USA

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good idea with the lead...

the tail servo is mounted on the frame bracket... i meant it's there instead of up front where the rest of the servos are.

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05-01-2010 12:16 AM  8 years agoPost 8
aussie_g

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Travelers Rest, South Carolina, USA

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Compare the weight of one of the 5625's to the weight of a HS-85 which will do a great job on the throttle...

If you need 11g all the way out the back of the tail to balance the machine, then you are WAY front heavy...

11g way down the back of the boom is about like 50g up front..
(not an exact calculation - but you get the idea)

Gareth

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05-01-2010 12:42 AM  8 years agoPost 9
ZAC ATTACK

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Hamilton Ontario, CANADA

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How are you checking the balance of your Heli???

MAAC#77677 Medicated daily for your protection

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05-01-2010 01:37 AM  8 years agoPost 10
josh mcormick

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fort madison, ia USA

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11 grams to add to tail! Just just got my raptor v2 (titan se upgraded) and its tail heavy as hell. hmm? Thought about moving tail servo to the front of heli and having a 20ft rod (as this seems kind of common so if been told) But I am new to this bird and this is the first thread if read of being nose heavy. Maybe I'm running that aluminum fuel, but actually if I remember right, mine was tail heavy with a dry tank, I think.

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05-01-2010 01:46 AM  8 years agoPost 11
ZAC ATTACK

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Hamilton Ontario, CANADA

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Half tank and a little nose heavy is just fine.Move the servo under the canopy is all I can say.

MAAC#77677 Medicated daily for your protection

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05-01-2010 02:27 AM  8 years agoPost 12
aadams1278

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Wilson, NC - USA

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How are you checking the balance of your Heli???
hold the heli on its side by holding the blade grips with the blades perpendicular to the body and see which way it rotates (around the main shaft) in my case the nose is heavy so it goes down and the tail rises.

i believe this is how raptortechnique recommends to do it.

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05-02-2010 01:18 AM  8 years agoPost 13
ZAC ATTACK

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Hamilton Ontario, CANADA

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11 grams difference from tail to nose in a 9 1/2 pound helicopter is unnecessary to balance out.Again,move your tail servo under the canopy and go have fun!! It will have a slight forward drift to it in a Hover beacause of being a little nose heavy,just sub-trim it out until your Heli hovers without you toching the controls.Voila!

MAAC#77677 Medicated daily for your protection

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05-02-2010 02:05 AM  8 years agoPost 14
aussie_g

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Travelers Rest, South Carolina, USA

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If you use sub-trim to balance the machine, when you flip inverted the heli will be badly tail heavy again.

Gareth

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05-02-2010 02:38 AM  8 years agoPost 15
ZAC ATTACK

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Hamilton Ontario, CANADA

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Were talking about 11 grams here! Not 110 grams.Im fly ing inverted just fine.That makes no sense at all sir?? You trim your controls differently all the time,wind,wind-gusts,cross-winds...Thats what trim on your TX is for,convenience.R50s have always been a little nose heavy,I had 5 of them..Trim it up and fly the S$53 out of it!!

MAAC#77677 Medicated daily for your protection

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05-02-2010 02:43 AM  8 years agoPost 16
aussie_g

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Travelers Rest, South Carolina, USA

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Actually it makes perfect sense..

If you want a helicopter to fly properly, balance it, dont use any subtrim at all..

If the OP requires 11g on the tail, approx 30 inches away from the main shaft, thats a lot of leverage and a LOT of weight....

if it was 11g up front which is about 8 inches from the main shaft it would be a lot different..

If you want to fly a heli & use subtrim to account for the imbalance of your machine, that is your choice.
But I feel that it is irresponsible to give that advise to anyone.

The correct thing to do is balance the machine properly, and any other way of doing it is just a shortcut that will result in poor performance..
Thats what trim on your TX is for,convenience.
Yes thats right, convenience, not for short cuts

Gareth

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05-02-2010 02:59 AM  8 years agoPost 17
aadams1278

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Wilson, NC - USA

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all this is true that aussie g is saying...i've been flying this heli for just over 1 year with no real "problems", but here lately i've been noticing that the tail doesn't hold so great when doing tic tocs and tumbles, it seemed to want to drop the tail a bit...i didn't know if it was a balance issue or just needing a better gyro.

i heard a friend say that balance will make more difference than you think and i thought i remembered from my initial set up that it was slightly tail heavy which would make sense if the tail was dropping in flight. so i thought adding some weight at the front would bring the balance in perfect and help the tail dropping in flight issue. but then i determined that it was nose heavy which surprised me.

anyway, long story short, i'm just now considering getting the balance just perfect, because i've had about 1 click of trim on cyclic and so far it hasn't caused me much problem, but as i'm progressing further, i'm wondering if the slight imbalance is what's holding me back now.

I know that 0 subtrim and perfect balance is the BEST way if you're doing 3d, while using trim is acceptable, none is better...so now i WANT zero trim.

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05-02-2010 03:01 AM  8 years agoPost 18
ZAC ATTACK

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Hamilton Ontario, CANADA

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Adding lead weight to balance a helicopter is bad advice.Im trying help the guy get a $120 servo out of the way of getting contaminated by oil.11 grams is nothing to worry about aussie_g.If your heli is drifting use a little trim,nothing wrong with that!! The lead, theres alot wrong with that!!You dont need it Buddy!! Cheers!!

MAAC#77677 Medicated daily for your protection

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05-02-2010 03:02 AM  8 years agoPost 19
aussie_g

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Travelers Rest, South Carolina, USA

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I was not trying to bust on Zac's choices, but after reading what I typed it sure seems that way..

I just believe that the only way to do it is to get the setup right & that for me includes all 0's in my trim, and a machine that will hover hands off...

Gareth

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05-02-2010 03:23 AM  8 years agoPost 20
aadams1278

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Wilson, NC - USA

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moving the servo up front will make the whole imbalance worse, plus i'd have to stop using my carbon tail pushrod (which is good) and go back to using the metal pushrod (bent and less good) and rod guides which gave me problems in the past with tail responsiveness. i'm already having to use a bit of trim, and i CAN tell that it needs a little bit of control input when inverted to hold a hover, so the trim DOES make a difference...

for ME, i choose to try and get the balance as perfect as i can, so trim is not necessary and flying inverted will be as perfect as it can be.

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HomeAircraftHelicopterThunder TigerRAPTOR 50 › How to add weight to the tail for balance (safely)
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