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HomeAircraftHelicopterHelicopter Main Discussion › Most Lightweight .50 Nitro Heli?
12-28-2010 04:42 AM  7 years agoPost 1
Anthony.L

rrElite Veteran

Seattle, WA

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I want to build this summer a VERY lightweight .50 size nitro as an experiment.

I hate to say it, but right now my focus is on the ElyQ Vision 50 Ultimate ($159 kit).

Here is why I'm thinking ElyQ might be the direction to go.

Mostly plastic (cause alum is heavy)
Direct to swash linkage (cause all the push pull linkage is heavy)
belt drive tail (cause torque tube is heavy)
LiFe RX battery pack (cause regulator is heavy)

I'm also thinking the original T-Rex 600N Sport would fit the bill as well. G10 frames and belt drive tail, plastic head and other parts.

So any ideas, other kits that fit the bill? Let's not get on a subject of quality, that's not terribly important for this project. If I want quality I will fly my Logo.

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12-28-2010 04:47 AM  7 years agoPost 2
JasonJ

rrKey Veteran

North Idaho

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I'll be watching this one, it should be interesting. I weighed my Raptor this summer, which I already knew was on the heavy end of the spectrum. It came in just under 8 lbs, fully fueled and ready to fly. I would be curious just how light a 50 size came be and not fold in on itself in hard flying.

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12-28-2010 04:55 AM  7 years agoPost 3
MagicFingers

rrApprentice

PH, Mi USA

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Lightweight .50
A lot of guys wouldn't like it, Bling is heavy.
I've seen someone post, "If there's no Bling, It's
not my thing!" What is the weight of RTF Ely-Q .50?
What is it if you take off the onboard glow starter?
Change to lipo from NiCd, take off camera, ect. ect.

Each one, teach one

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12-28-2010 05:53 AM  7 years agoPost 4
helidevil

rrElite Veteran

Brunswick, ME

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from what i know the TT X50 is the lightest "stock" machine out there....you could do some frame work or something to lighten it up even more? lol

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12-28-2010 06:05 AM  7 years agoPost 5
Anthony.L

rrElite Veteran

Seattle, WA

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from what i know the TT X50 is the lightest "stock" machine out there
I'm thinking no, just for the fact it's mostly carbon and alum.

From TT's site:

Fully Equipped Weight: 6.83 lb (3150 g)

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12-28-2010 06:07 AM  7 years agoPost 6
daveketelhut

rrNovice

canton michigan

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my 3D+ comes in at 7 pounds on the dot with not the lightest setup. im going to get rid of the regulator and go with a life pack

Team take it easy

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12-28-2010 06:09 AM  7 years agoPost 7
Anthony.L

rrElite Veteran

Seattle, WA

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What is the weight of RTF Ely-Q .50?
I'm not entirely sure yet, but I think it could be done around 6-6.5lbs wet and ready to fly. I think that should be the goal.

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12-28-2010 08:00 AM  7 years agoPost 8
LonR

rrElite Veteran

Macomb,Mi

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The Velocity 50 is right around 6.5 lbs.Mine was 6.7 lbs and im sure with the equipment you posted,it would be around 6.5 lbs.

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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12-28-2010 11:30 AM  7 years agoPost 9
McKrackin

rrProfessor

Lucasville,Ohio

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It ain't mine.lol....

The Frenzy with G10 frames and plastic belt drive tail is 8.7 pounds with fuel and the Trex 600 FBL is 6.9 pounds with fuel.

I literally never use the word literally right.

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12-28-2010 12:39 PM  7 years agoPost 10
SamurAchzar

rrNovice

Israel

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I'd go with:

FBL
Remove fins
Drill frames
BLS451 with straight LiPo setup (lighter than LiFe)
V-bar/Total-G with integrated governor and satellites

Should be a very interesting machine indeed.

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12-28-2010 03:21 PM  7 years agoPost 11
jschenck

rrProfessor

La Vista, NE.

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I'll have to weigh my Vision 50 Ultimate, it is light. Some other considerations - Servos. Metal geared servos weigh more than plastic geared servos. Mine has 9252's in it now. That's adds up when you put 5 of them on. Also look at the weight of the engine and exhaust, significant weight differences there. Going light weight on the Vision will require you move the tail servo up front and put the battery as far forward as possible, they can be tail heavy. Also take the horizontal fin off and get as light of a vertical tail fin as possible. One part on the Ely.Q that is heavy is the swash plate, it's almost twice the weight of a Raptor swash. There may be other options. They do have a different swash but I don't know what it weighs. I do like the design of the Vision Ultimate though. Mine has the 3rd bearing kit for the mainshaft installed (extra weight but nice).

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12-28-2010 03:32 PM  7 years agoPost 12
Rogman88

rrElite Veteran

West Monroe, LA

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I am big on lighter is better. I guess I got it from flying planks with wing loading and all that. Lighter planks don't tip stall as easy and I would imagine lighter helis could be thrown around a lot better as well. Interesting project. If you had a really light .50 sized heli I bet it would fly with more power to weight and thus closer to electrics. Actually probably better since electrics are kinda heavy by comparison.

High Voltage just works better

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12-28-2010 04:31 PM  7 years agoPost 13
Santiago P

rrProfessor

South West, Ohio

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Actually probably better since electrics are kinda heavy by comparison.
True, but their power to weight ratio is anywhere from 30% to 45% higher. That is significant!
Look at some rough numbers.

Glow:
OS55~2.5hp=1862.5watts /7.0 lbs= 266watts/lbs

10-12s Electric:
3000watts /8.2 lbs= 365watts/lb

Not trying to make a glow vs electric debate, I prefer nitro for everyday flying, but switched to electric for competition for diferent reasons than power.

Anyway, go for the "Superlight 50" and remember to keep the engine mount and main shaft supports stiff, two areas you do not want compromise.

Santiago

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12-28-2010 04:38 PM  7 years agoPost 14
Santiago P

rrProfessor

South West, Ohio

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More on topic:

Some of the hardcore guys who drag raced, were weight reduction freaks. Here are some really good tricks

-Custom made Titanium main shaft and spindle.
-All Carbon rear end, boom, supports.
-Chopped (as is narrower or shorter) Lightweight canopy
-Carbon main gear (two struts ala 3DM)

Hope that gets your juices flowing

Santiago

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12-28-2010 10:31 PM  7 years agoPost 15
Ron's RC Helicopters

rrNovice

Corpus Christi, TX

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At one time I had an X-cell 60 Graphite that weighed 8.1 pounds with blades and 5 ounces of fuel. I shaved weight everywhere I could. It was meant to be a drag racing machine.

It was a big disappointment. Straight up it was a rocket, but in a race it just didn't penetrate through the air very well. I thought it would be a good machine for auto contests, but that wasn't the case either. It took way too much negative pitch to keep the blades spinning. Go figure.

I took all the light stuff off and returned it to, more or less, stock form. I've pretty much retired from drag racing. Tired of getting my butt kicked :-) I still get in an auto contest once in a while and I prefer a machine that is on the heavy side of average.

Just my 2 cents.

Some of the ways I shaved weight were:

I used a lightweight T&T head block which was lighter than the plastic one.
I used a hollow Bergen main shaft.
The Main gear was double sided but I cut the extra material off the bottom side.
I used a 600mah battery and a 6oz. fuel tank. No filter, no header tank.
I used an old style single rod boom support.
It had the lightest landing gear I could find and the skids were cut as short as possible.
It had carbon frames and a carbon boom.
The torque tube had only one bearing close to the center.
I did away with all the push pull stuff and ran single rods.
I lightened the motor mount considerably.

Don't try aluminum bolts and nuts. They simply don't work.

Good luck. I hope you like your light machine more than I did mine.

Ron

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12-29-2010 09:04 AM  7 years agoPost 16
3dwanabe

rrVeteran

Huntersville, NC

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I had an Ely-Q Vision Ultimate a couple years ago. At 6-1/4 pounds it was very light. The lightest 50 that I've ever had or seen. Airborne electronics were 9252's, 601/9256, HS-81 on throttle, 600mAH nicad and no gov. It was very responsive,fast and tracked really well. Made the non-hyper OS 50 feel like a 90. I'm thinking of building another one with a Hyper 55, should be a real powerhouse.

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12-29-2010 09:38 AM  7 years agoPost 17
Anthony.L

rrElite Veteran

Seattle, WA

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Yeah I was thinking the same thing, OS 55 Hyper should make it come alive!

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