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HelicopterThunder TigerOther › Lighten a Raptor 90 SE
10-07-2005 12:42 AM  12 years agoPost 1
cleofe

rrNovice

California

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What is the best way to lighten a helicopter? I am currently running a Raptor 90 SE and I must say that the helicopter is phenominal.

I am really just looking for a way to put the 90 SE on a diet so to speak. The 90 SE as great as it is it could benefit from a shedding possibly .50 to 1.00lbs

I would greatly appreciate if you guys could help me locate and eliminate some of the excess weight .

Any suggestions are greatly appreciated.

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10-07-2005 12:50 AM  12 years agoPost 2
Heli-pres

rrApprentice

American Fork

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Lightness

You can take off the side frame stiffeners, and that is the biggest savings you will find. You can put in the Infinivation head dampners and take out the pin that holds the head spindle, and also take out the bearings in the head block that the pin rides on.
JOHN


Quick UK Flight Team

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10-07-2005 12:57 AM  12 years agoPost 3
cleofe

rrNovice

California

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I should have mentioned that I have already removed the Sideframe Stiffners as well as the carbon base plate. As far as removing the Head Pin and it's bearings, I'm not convinced that that is the best way to run the head.

I already have the Infinaviation Dampners.

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10-07-2005 01:05 AM  12 years agoPost 4
jzeller

rrApprentice

Victoria, MN - USA

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Hey, that's a good idea (pin and bearings).

Use the lightest possible battery - I use 1700AUP packs at 5 oz. Take off all of the thick washers on the side frame bolts except for the ones on adjustable bolts (motor mount, bearing blocks). Replace the grips with plastic ones. Leave off the reinforcement ring on the one-way. Cut away much of the side and rear of the canopy. Some of the frame spacers aren't needed if you don't use the side stiffeners - See the R60 manual. Leave off the horizontal fin. Lighter paddles are a given. Much of the motor mount can be milled away if you have the equipment. Carbon landing gear if you have money to burn.

John

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10-07-2005 01:38 AM  12 years agoPost 5
jzeller

rrApprentice

Victoria, MN - USA

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Better yet get a couple of 1320 prolite packs at 2 oz. Swap out after 4 flights. Or how 'bout a 730 TP pack at 1.1 oz! Good for 2 flights each.

John

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10-07-2005 01:49 AM  12 years agoPost 6
Yug

rrMaster

UK. Herts

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Splitting hairs!
Yes I know i know it all adds up. How about using 200ml fuel tank and no header tank.
Make all metal parts out of titanium including main shaft, head, grips, frame posts and screws.
Replace batteries with onboard generator and supercap.
Trim all wires to minimum length - mount gyro up front.
No horizontal fin.
No sideframe stiffeners or base plate.
Carbon canopy - unpainted
Carbon Skids
Most important - use an anti-gravity capsule.

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10-07-2005 02:56 AM  12 years agoPost 7
Bobby Watts

rrVeteran

Orlando, FL

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Ask Colin Bell (ColinB) Apparently, he has a way to make it alot lighter!!!

www.bobbywatts.com

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10-07-2005 10:54 AM  12 years agoPost 8
damaen

rrVeteran

Umeå, Sweden

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Additionally you can remove the plastic spacers between the upper and lower frame.

Henrik

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10-07-2005 11:12 AM  12 years agoPost 9
AJT

rrVeteran

KINGSTON, NY

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carbon base plate ? 90-SE.

I thought about removing mine. It would make a lot easier for cleaning and general maintenance. It would seem the landing gear ties to the frame for stiffness. But is that enough? That is my question. Any thoughts are welcome.
AL.

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10-07-2005 11:40 AM  12 years agoPost 10
crowfly

rrVeteran

Pleasant View, TN​U.S.A.

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Check this out.

http://www.horizonhobby.com/Shop/By...?ProdID=HAN3550

If God had meant for man to fly, he would have given him more money

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10-07-2005 09:52 PM  12 years agoPost 11
jb_turner

rrElite Veteran

USA

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No vertical or horizontal fin.
No landing gear.
No boom struts.
No canopy.
600mah battery and just recharge after every flight.
smaller tank (just big enough for one flight).
Shorter lighter blades.

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10-07-2005 09:56 PM  12 years agoPost 12
zoom boy

rrKey Veteran

N.E. Lincolnshire UK

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Why not just buy a R50SE and do a big block conversion?

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10-07-2005 10:26 PM  12 years agoPost 13
cleofe

rrNovice

California

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any idea where I can get titanium screws?

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10-07-2005 10:30 PM  12 years agoPost 14
JKos

rrProfessor

Redondo Beach, CA

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> any idea where I can get titanium screws?

http://www.lunsfordracing.com/ is one source.

- John

RR rules!

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10-07-2005 11:09 PM  12 years agoPost 15
Kjetil

rrApprentice

Oslo, Norway

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Some cool and light frames here http://www.raptor.at.tt/ check out the frames under Raptor_Tuning. Nice fins too...

(One pop-up when you enter the web page)

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10-07-2005 11:09 PM  12 years agoPost 16
frankg11

rrVeteran

Bellevue, WA

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This thread sound like a bunch of road bike riders I know. Hey lets shave 10 grams off my bike. I will replace the crank arms with titanium. Hey it's 10 grams and $1000.00 but the bike will go faster.

Soon a $3,000 bike is $12,000 and 1 lbs lighter.

Next thing you know they are drilling holes in the frames to make the bike lighter and boom, the bike breaks.

So don't go drilling holes in your boom to make it lighter.

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10-07-2005 11:16 PM  12 years agoPost 17
deafheliflyer

rrKey Veteran

Arizona

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hi

Fromeco 2400mah Li-Ion batteries are only 3.3oz and you get about 6 flights using all digitals...

Just my .02$

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10-08-2005 12:22 AM  12 years agoPost 18
cleofe

rrNovice

California

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Soon a $3,000 bike is $12,000 and 1 lbs lighter.
The true definition of a hobby!

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10-08-2005 12:35 AM  12 years agoPost 19
Yug

rrMaster

UK. Herts

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I got my R90 down to 1Kg today. Yes you guessed it. I was on the sim.

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10-08-2005 12:40 AM  12 years agoPost 20
jzeller

rrApprentice

Victoria, MN - USA

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I was thinking maybe replacing the bearings with full ceramic versions, but that would cost around $10,000.

I've seen people drill holes in the landing gear and mill off the plastic frame ribbing. The Trex guys mill out half of the frames. One could probably mill out a lot of the main gears, like Mikado does.

I've been tempted to use a mini/micro servo on throttle. An HS81 weighs 0.58 oz., and is plenty fast and strong. That's a 1.1oz savings.

Some of the micros use aluminum ball links.

Looking to the motorcycle/car racing world for inspriation: Titanium shafts would be great; A titanium or carbon muffler would be nice; My YZF-R1 uses hollow bolts to save weight.

John

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