RunRyder - This one is for REAL!!!!

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Speed - Performance - Drag Race > This one is for REAL!!!!

KenJ
Veteran
Location: Ohio, USA

A few weeks ago, there was a post of an R-50 with a supercharger hanging off the side.

Well, after some serious doubts that the pic was real,

(I think it was altered)

I contacted the manufacturer of the SC and have been working with them.

It should be here this week for some in serious testing.

RB Innovations builds the unit, but don't bomb them with inquiries too quick!!

I will have some test data comparing various forms of modifications up within a week or so.

Ken

Oh yea,

Check my Gallery, you might have to click on "Display All"

Team JR

06-04-2003 Over year old.

HOMEPAGE

Airman98
Key Veteran
Location: Southern Illinois

Im ready for some more power my OS50 just isnt enough.
Tim

06-04-2003 Over year old.

mystar60
Senior Heliman
Location: Clifton, NJ

re: sc

Ken is that the same one they advertise on a T-Maxx truck . I saw one @ the WRAM show. If that works out - Look out

06-05-2003 Over year old.

HOMEPAGE

KenJ
Veteran
Location: Ohio, USA

Yup!

It is the same company, just a slightly different version.

I have already started on some testing parameters

I am going to test these different configurations

R-50 / OS 50 Stock exhaust
R-50 / OS 50 Muscle pipe
R-50 / OS 50 Stock exhaust with Super charger
R-50 / OS 50 Muscle pipe with Super charger
R-50 / OS 50 Modified with Muscle pipe
R-50 / OS 50 Modified with Muscle pipe and Super charger

Time to climb (100 meters)
100 m drag from a standing start
Top Speed

CAN'T WAIT!!!!

Team JR

06-05-2003 Over year old.

HOMEPAGE

mystar60
Senior Heliman
Location: Clifton, NJ

Here you go - http://www.rbinnovations.com/

06-12-2003 Over year old.

HOMEPAGE

the Wasp
rrProfessor
Location: Vt

Furious Raptor,,, how's the testing going,,, you should test the charger with the larger 60B carb, the carb will alow your motor to rev a lot higher and the charger and tuned pipe will give you more torque,,, together,,, WOW...

Jim

Jim
the wife wont let me get a Monkey !!,,, damm, can't have anything

10-29-2003 Over year old.

Sar
Elite Veteran
Location: Kingston, NY

Thanks for the update Ray, I have been curious how testing on this thing would work out.

--
Jon

10-30-2003 Over year old.

HOMEPAGE

the Wasp
rrProfessor
Location: Vt

Ray,,, did you try different pulleys, I wonder if a larger pulley on the crank, and a smaller one on the charger would help, that would give more doost,,,

mabe a charger wont work on these type of induced motors, for a 2 stroke a charger may need a reed-valve, I know that they put turbos on 2 stroke snowmobiles, and they get up to a 150% boost in HP, so it's well known that forced induction will work on a 2 stroke,,, you just need to find the trick...

Jim

Jim
the wife wont let me get a Monkey !!,,, damm, can't have anything

10-30-2003 Over year old.

Perdanatwin
Senior Heliman
Location: Malaysia

Forced induction system works in the priciple of presurising the combustion chamber. This works well in a 4 stroke engine simply because they have seperate intake strokes and exaust strokes. During the intake stroke only the inlet valve is opened and the exuast valve is close. Where presurising the combustion chamber is possible.

However if you look at 2 stroke engines, the intake and exaust strokes are the same stroke, meaning the exaust port and intake port are open at the same time. Exuast takes place when the inlet gas (with fuel and air) forces the burnt gases out. Meaning, there is no point in forcing fuel/air into the chamber. The forced fuel and air will just exit at the exaust port, thus the chamber is not presurised at all.

Thats why it need significant modification to a 2 stroke engine to get forced induction to work.

The only method that works with great success in 2 stroke engines is variable valve/port timings and size. These are found in Yamaha's and Suzuki's 2 stroke bike engines.

Now you know why it doesnt work!?

10-31-2003 Over year old.

helibobby
Senior Heliman
Location: saklflsajl;/asdfasdf

thats no good

well that suck i wanna see one of them work right see if they ever will give any power

10-31-2003 Over year old.

Frequency47
Veteran
Location: Port Ewen, NY

Question

I am reading about this whole drag thing, and all I know about drag is that you fine these kinds of people in Greewich Villige in New York City.

I am facinated though that this technology is available. I personaly would not go this way on a chopper but it is cool. I would do it to a car or truck.

I wonder though, if you have to force a two stroke to accept a turbo charger, why not spend more time on getting a four stroke to do the job.

Are there any benifits to adding a four stroke to a chopper with a turbo charger? And if so what are they? I figurered that you may gain more horse-power for pulling a heavier load in a photo-chopper. Do I have the right idea or is it all about speed?

CEO Sub-Terrainian Aircraft Development Corp.

10-31-2003 Over year old.

Perdanatwin
Senior Heliman
Location: Malaysia

I cant imagine how small of a turbo charger would be suitable for even a 90 size engine. If one ever get hold of such a small tubo charger, I wonder how effecient it is. Too big of a turbo charger, you will never get any usable boost presure at a givan rpm. too small (in this case for Rc engines) it will be theoritcally too small for a turbo charger itself to work. Not enuf centrifugal forces.

In fact OS has a 120 (I think its 120)supercharged. But looking at the dyno graphs the increase is marginal. Infact 4 strokes has very low RPM compared to 2 stroke engines. But they have plenty torque.

10-31-2003 Over year old.

the Wasp
rrProfessor
Location: Vt

.

Jim
the wife wont let me get a Monkey !!,,, damm, can't have anything

01-21-2004 Over year old.

Doug
Elite Veteran
Location: Naples Florida....

Let me predict..........

No noticable improvement.

First member of Member of Bearings Anonymous

01-21-2004 Over year old.

the Wasp
rrProfessor
Location: Vt

well I went to write a reply, but I had to leave,,,

but what it means is, a turbo or S-charger will never work on a 2-stroke without a reed valve,,,

but there is always a but,,,

but a turbo or S-charger will work with a Zimmermen disk valve, such as the OPS boat motors use, the only problem I can see at this point is that the carb will be on the backing plate and need duct work, it all seams to bulky, to complicated for what little boost one would get for the money, specially when a larger carb with a tuned pipe has proven it's self,,, but hey, with the power of a Zimmermen disk motor you wont even need a turbo, S-charger or a larger carb,,, then their are guys mounting larger YS 61 in their 50 size helis,,,

the options will never stop !!,,,
so you have the option of mounting a larger 61 in your 50 size heli, which leads to the option of mounting a larger carb and tuned pipe on that 61,,,, you better have some large tail blades on that baby

...

Jim

Jim
the wife wont let me get a Monkey !!,,, damm, can't have anything

01-21-2004 Over year old.

Caliber-1
Heliman
Location: Kyosho heaven

Some of you power enthusiasts seem to forget things about engines and how they function. I have a friend who has extensive knowledge of engine mechanics and design. Explaining the "super charger unit" and the heli engine he showed me how in fact in doesn't do a dam thing. Reason why? Our heli engines are designed to run at specific RPM's where is a super charger depends on the constant gain of RPM. I can't explain it as well as he can but I can say I understand why it does nothing as far as increase in engine power.

Want more power? Go bigger engine .....already done that.......increase the nitro.

01-25-2004 Over year old.

the Wasp
rrProfessor
Location: Vt

"a super charger depends on the constant gain of RPM",,, that may be true with a 2 stroke (I do not know), but it's not true with a 4 stroke, off shore race boats prove that, off shore race boats travel great distances while turning a constant RPM,,,

but then-again, a 4 stroke with a super charger will be to too heavy for any real performance in a racing heli,,,

I agree, bigger motor and more nitro

Jim

Jim
the wife wont let me get a Monkey !!,,, damm, can't have anything

01-27-2004 Over year old.

Supertoyz
Senior Heliman
Location: Colchester, VT

I agree, it sounds like your friend is the one in need of a lesson. A Supercharger by pressurizing the intake simply increases the amount of air in the combustion chamber. An engine normally sucks in air at ambient air pressure. If you pressurize the intake air via a Turbo or Supercharger you are now cramming more air into the engine than it could suck in on it's own.....add more fuel to keep the Fuel air Ratio correct and you get more power regardless of RPM. A Turbo and Supercharger do essentially the same thing only a Turbo is exhaust driven and a Supercharger is driven off the crankshaft. Both have their own unique characteristics but the end result is more power. Getting back to superchargers, being belt driven they provide boost from right off idle up, the higher the RPM the higher the boost (too a point) you simply gear the supercharger to provide max boost at whichever RPM level your engine is capable of turning. Nitrous is another way of doing the same thing.....you inject more oxygen into the intake tract and it's the equivilant of forcing in more air, add more fuel and you get more power.

It's impossible to tell why these systems are producing no noticeable results on the R/C engines. It could be insufficient boost levels, restrictions in the intake or exhaust path, incorrect A/F ratios or just a flawed design. I think the engines run pretty well just as they are now and don't see the need for a supercharger....Personally I'd rather see EFI before forced induction.

04-16-2004 Over year old.

Cornster
Senior Heliman
Location: Thornton, CO USA

Back when I was flying planks, I messed around with Ram Air Induction.

Basically what I ended up doing was taking a piece of copper tubing with an inside diameter that matches the outside diameter of the throttle body intake, with a 90 degree bend in it. I would cut the pipe on a 45 degree angle in the 90. Then I would mount the straight end of the pipe on the carb with a set screw. The 45 degree cut allowed the 90 degree bend to face directly into the prop. Basically my prop was ramming the air into the engine. Biggest thing I noticed was, I had to richen my mix BIG TIME. I think I ended up having to richen the high speed needle an extra 2 1/2 turns. Was a pain to start, would have to lean it out 3 turns to start it, once started would fatten it back up and then go. Gave me a decent RPM increase at full and drastically improved the response and initial punch, but didn't allow me to turn a larger prop or anything else.

But I would be suprised if their expensive superchargers/turbos provided any better results than can be obtained through the Ram Air method I came up with above.

Cornster

04-20-2004 Over year old.

HOMEPAGE

ozheli
Senior Heliman
Location: Sydney, Australia

What I don't understand is why the hell this company is advertising all this crap if nobody has had any luck with it?

Does it work or not?

05-04-2004 Over year old.

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