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Gasser Model RC Helicopters > RC230 in an Eagle GS

Nasscar][
Veteran
Location: Newark, Delaware

I'm thinking about replacing the under powered engine in my Hirobo Eagle II Series Gasser.

I have been hearing of people using the RC230 engine as a replacement engine of choice for this heli.

Could someone please provide detailed instructions with part #'s if possible for installing this engine in the Eagle II GS?

Thanks,

Also has anyone tried installing the RC230 and electric start combo in this heli?

04-10-2003 01:53 AM

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the Wasp
rrProfessor
Location: Vt

I used to port Zenoah boat motors, if you want some porting on that Tanka 24cc I will do it for you, $100, that will include raising the compression too,,, but the right size carb is up to you,,,

let me know
Jim

Jim
Buzz Buzz Buzz

04-10-2003 02:18 AM

Billme
Key Veteran
Location: MS

Contact ELOSSAM here on RR...He has done it...Also he has upgraded it to the RC260 (26cc)
Regards,
Bill

04-10-2003 06:28 AM

Nasscar][
Veteran
Location: Newark, Delaware

Thanks Guys for the fast response.

I think i'm going to just replace this tanaka 24cc with something designed to do the job.

I'll drop ELOSSAM and email to see if he can help me.

04-10-2003 11:12 AM

HOMEPAGE

the Wasp
rrProfessor
Location: Vt

it's not the motor that's your problem !!,,, it's all in the porting !!

Jim

Jim
Buzz Buzz Buzz

04-10-2003 06:26 PM

Lee Conner
Heliman
Location: Sinking Spring PA

Mitch, is working on the RC230 into the Hirobo gasser.
www.rockdriver.net/RC230Engine.htm

WASP, what kind of HP change will I get with your porting and compression change?

04-12-2003 02:30 AM

Billme
Key Veteran
Location: MS

Thats right, Mitch is doing this...Maybe he is finished with it....

On the Ca- tank- uh engine..The problem is not only the ports, the carb can't even supply enough flow with the stock size ports

Regards,
Bill

04-12-2003 03:18 AM

the Wasp
rrProfessor
Location: Vt

H-Power

I was going to do a motor for Mitch, but he went with a Z-motor,,,

I can't say what your H-Power increase will be, I did a lot of gas boat motors and 2 gas plane motors, and they all seamed to work out good,,,

one of the problems with these little gas motors is getting fuel/air in the motors, like on the Home Lite 25cc and 30cc (used for boats), they have very small intake ports, stock the intake ports are as small as the Zenoah G2D, so just by opening up their intake gives them more power within it's stock RPM curve/envelope,,, the trick is NOT to lower the intake port to much because you will lose low RPM Power/torque, but usually these intake ports are not that wide so I can remove more material off their sides,,,

but, the thing to do is to check their timings and go from there, if I did the porting and it wasn't enough and you wanted more power I can open the ports more a second time,,, if you want a really hot motor, then I could just open the ports more the first time,,,

pistons can be modified to allow more fuel/air to transfer to the inside transfer ports, but I will not know until I see the inside of a Tanaka,,,

let me know !!
Jim

Jim
Buzz Buzz Buzz

04-12-2003 05:13 AM

the Wasp
rrProfessor
Location: Vt

I'm sure if you guys used the same carb that the RC230 is using you would be happy with it..

Jim

Jim
Buzz Buzz Buzz

04-12-2003 05:16 AM

Nasscar][
Veteran
Location: Newark, Delaware

Will that carb fit on the Tanaka 24cc engine. And if so how much does it cost?

04-12-2003 05:39 AM

HOMEPAGE

ELOSSAM
Veteran
Location: Es

Mitch gives me the idea of the Eagle conversion to G230RC engine. I wrote him after doing it because he was to bussy to finished the conversion, so I offered him the pics of my Eagle with the G230Rc fitted inside to be placed on his web. Have not spoke with him anymore so I dont know if he was trying any different way to do it or not.
About the Tanaka, the engine was carefully placed into a box waiting for time to develope another stranger idea but that´s another history. It will never be fitted into any of my helis. Personally I thing this engine has not any future in my hands and I don´t want to waste time with it.
In other way it´s too easy to get more and more power from the G230RC. The 25.5 cc, Cylinder, a good muffler, and finally a velocity stack can do miracles on it . The last piece to be tested is the velocity stack. It was designed to run with stock K&N air filter and gives a more lineal airflow from the air filter to the carb. The system that VARIO HELICOPTERS use to fit it forces the airflow to turn two times before the carb and as far as I know this is not fine for it.
I want to test it tomorrow but the weather is very bad and may be I must wait a few days more.

Elossam

04-12-2003 10:52 PM

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Nasscar][
Veteran
Location: Newark, Delaware

What price should I expect to pay for the RC230 / RC260 engine and the have a few different variations of this engine.

What are the part numbers for both?

Thanks,

04-13-2003 12:58 AM

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ELOSSAM
Veteran
Location: Es

Nasscar.
Where do you, live?

I payed 282 eur for a stock G230RC unit.
You can buy from www.toni-clark.com a G230RC at 358,00 eur with the difference that it will be checked before shipping. Read more about it on his web.

Elossam

04-13-2003 04:58 PM

HOMEPAGE

Lee Conner
Heliman
Location: Sinking Spring PA

Nasscar, here is another link for your 230.
http://www.horizonhobby.com/

Elossam, would you post a "How to" for the RC230 into the Hirobo?

04-13-2003 08:15 PM

ELOSSAM
Veteran
Location: Es

Lee, here´s my testament

Both engines have the same size but with a reversed fan position.
Once placed, the Tanaka has the fan on the upper side but the Zenoah runs with it at the bottom. Your (and mine too) heli frames are designed to allow the Tanaka fan to go out from the frames but with the zenoah it is impossible. Two options are available:

The largest one is the one I choose increasing the heli frame wide using longer spacers between the inner frame and the external ones. I did it with 6mm alu tube cut with new distance and fitted with longer screws.

The old tanaka clutch bell fits perfectly on the new engine but it was neccesary to file a little the carrier plate for clutch high (about 1 mm high). That must be done on a lathe to assure a fine work.

The metallic angled reinforcements at each base frame must be fitted
on the inner side to allow the use of the original landing gear base. This change is the one that will give you the new wide distance between frames.
The engine now is hanging from the same four screws like the old one. I made another two pieces to fit it securely.

There are two alu brackets running from side to side behind the engine and screwed to three points there, one just below the main shaft of the heli,similar than the old way, and the second arm in the bottom fitted with two screws.

In both tof the above pics you can see the angled reinforcements placed inner side instead of outside as in origin.

It must look like this one.

As I told you at the begining there are two ways to do it and this is the
longer one and for me the best but a friend followed my steps only modifying the clutch high and then he cut the main frames on its
bottom leaving it full open there except for the angled reinforcements.
He told me it works fine and survived to some brutal crashes but have
no pics of it to show you.

It seems to be difficult but far away from reality if you have a lather nearby. Of course it´s not a five minutes time working to get it ready to fly but for me was the best time inversion I ever made.
A leather will need about two hours to get all the pieces finished and you will need to spend two hours more assembling it.because the only new thing you must do is to make two new holes for the lower bracket on your external frames.

The shorter way will take you less time and money but you can increase safety adding the lower bracket with the requiered meassure.

Elossam

04-13-2003 10:39 PM

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ELOSSAM
Veteran
Location: Es

Sorry it was double posted
Elossam

04-13-2003 10:51 PM

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Lee Conner
Heliman
Location: Sinking Spring PA

Elossam, thank you very much! I love my Hirobo gasser, but always longed for a beefier engine.

Here is a site that put the 230 on a Dyno and used different exhausts.

http://www.rctek.com/dyno/zenoah_g230rc_dyno_test.html

04-14-2003 12:56 AM

ELOSSAM
Veteran
Location: Es

Hi Lee
I know about this web, I saw it too after ordering my engine but all that numbers comes from the use of RC car exhaust systems and they are too big and with rare exhaust to cylinder conection to be used on Helis.
You need power but you also need a flat power and tork curve. The RC car exhaust as far as I now look for the highest power point and sometimes take apart the tok curve. .
The original buffalo muffler supplied with the engine works fine (except for noise tone

) and may be with the Zimmermann one I´m currently using I have not more power but I have a more friendly power curve and an amazing iddle. It has more back pressure than the original one but that runs in you favour when looking for low to middle reponse.

Let me know if you´ve any other question
Elossam

04-14-2003 03:02 PM

HOMEPAGE

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Gasser Model RC Helicopters > RC230 in an Eagle GS

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