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HeliProz . ZoomsHobbies . HeliHobby

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Engines Plugs Mufflers Fuel > 50 Class IMZ Competition Engine
 
 
Itsindilas
Veteran
Location: Greece-Athens

Why to pay 400$ for this engine, meanwhile the OS 50 SXH and the Webra 52 AAR give me 0.1 and 0.2 PS output more and in the same time I can have them for a total of 400$ as a combo with a heli and a weston pipe?
04-20-2002 Over year old.
 
 
RCMarket
Key Veteran
Location: Belgium , Europe

jr engine 400 $

no reason, just a waste.

Alex (Formerly Known as Futurac )
04-20-2002 Over year old.
 
 
azfaith
Heliman
Location: Las Vegas

IMZ 50

I bought one and had great luck with it. Real easy to get running right. needle did not need adjustment after I got it set. The instruction comes with specs for 600mm blades. it gives you throttle and pitch curves which worked great for my Sceadu. It has an awesome responce and smoothness, I would compare to fuel injection in cars. it seemed to have more low end torque. I ran it at a lower head speed. It was not as sensitive to cyclic imputs as my OS 50. Plus it comes with a KSJ muffler so that helps offset the price. I would recomend it if you are into precision flying. It sounds like it is just kinda idling along compared to the OS 50. It has a 16,000 compared to OS 20,000rpm
04-20-2002 Over year old.
 
 
Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

Itsindilas. I'm assuming you're replying to my earlier question. To answer yours, I don't have a use for the Webra, and I have enough OS50s. Azfaith, good post from someone who actually is running the engine. The two guys above lend absolutely nothing to the discussion. I've already done the math, thanks guys. Tell us your impression of how it runs, nothing else is required.
04-20-2002 Over year old.
 
 
rickc
Elite Veteran
Location: Creve Coeur IL. (Peoria Area)

>>>>>>jr engine 400 $ no reason, just a waste.<<<<<<<

Why buy a Ferrari when a Fiat will get you to the same place, is that the way your thinking? That works for some, but I like seeing what new products are like. I’m very impressed with the engine. We have an OS.50 at the field, let me get the IMZ broken in and I can compare performance. What’s on paper does not matter, manufactures claims of rated horsepower are all different due to the way they test their engines.

Rick
04-20-2002 Over year old.
HOMEPAGE  
 
 
tetsuo1
Senior Heliman
Location: Hendersonville, TN

Cost Effective

It is not so much a question as to which performs better, but which is more cost effective.

The IMZ better provide higher performance for what it costs. But even if it does beat the OS50, the important question is does it beat the OS50 enough to justify the cost increase.

Most will say that they will pay more for a better product. But there is a line between getting a higher quality, higher performance product and getting shafted by a company that overcharges or develops a part that just is not cost effective. I am sure someone could come up with a $5000 30-sized heli with titanium parts and a platinum plated head. Someone would buy it and say it is the best thing but it would never make it to the mainstream.


Jason
04-21-2002 Over year old.
 
 
Beezer
Veteran
Location: Ontario, Canada

Might be a stupid question but doesn't the $400+ IMZ price tag also include the new KSJ tuned muffler made especially for this engine?


04-21-2002 Over year old.
 
 
Lwnemesis
Senior Heliman
Location: Seattle, WA

yes it does come with its own muffler and also to clarify its not the horse power that turns our blades its the torque the IMZ does not bog down when doing hard 3d because it has more torque
04-21-2002 Over year old.
HOMEPAGE  
 
 
Beezer
Veteran
Location: Ontario, Canada

Ah ok.. Then the price is not so bad. Don't plan to buy one myself but if it was $400 just for an engine that would be abit much.
04-21-2002 Over year old.
 
 
rickc
Elite Veteran
Location: Creve Coeur IL. (Peoria Area)

The added torque comes from the reed valve setup. I remember my motorcycle racing days when reeds were introduced in the early 70's. It made a huge difference in the low-end torque of 2 cycles. I heard that they make a .61-sized IMZ that is only available to the Japanese JR Team Pilots. I guess it it very powerful and silky smooth. Yes the engine is pricey but with the nice KSJ muffler it seems to help the crunch on the wallet. After running the engine and seeing for myself the smoothness and performance. I am 100% glad a made the purchase and would do so again.

Rick
04-21-2002 Over year old.
HOMEPAGE  
 
 
Blade
Heliman
Location: Tulsa. Oklahoma

azfaith

Did the IMZ require a different engine mount for your Sceadu? Glad to hear that you are enjoying it.


rickc

Looking forward to your report on the engine once you have broken it in.

Thanks
04-21-2002 Over year old.
 
 
Lwnemesis
Senior Heliman
Location: Seattle, WA

IMZ requires diff mount than the os50 as far as i know mounts for the IMZ are only available for JR helis maybe KSJ will make an IMZ mount for the Sceadu
04-21-2002 Over year old.
HOMEPAGE  
 
 
Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

Just to elaborate on Lwnemesis' s torque statement. You're correct that torque is what we are really interested in. I make my living in the hi- performance auto and marine industry. I have used an illustration of a tractor trailer many times with my customers. The numbers may not be perfect, but the science is sound. Say we build a hi-performance Chevy 350cid V-8 engine that dynos at 400hp@say 6500rpm. The torque output of this engine would be around 375foot pounds. If you put this engine in a Camaro or some other 3000lb car, it would be very impressive.Now, we have a tractor trailer that weighs 80,000 lbs, and is powered by a 6 cylinder diesel Cat with the same 400hp but making around 12-1400 foot pounds of torque. If you put the Chevy engine in the tractor trailer, it probably would not get it to move, or would not pull the load down the road. Also, the Cat put into the Camaro would be anything but impressive. The IMZ motor mount difference will be an issue for most people, too bad they could not have gotten around that . I'm planning on milling up a billet aluminium mount for a Raptor 30 stretched to 50 size. I'm bored with the carburetor. I've been tweaking them in automotive for over thirty years, and RC for twenty. For me, it's time for something different. If we don't buy the new products, there will be no incentive for the companies to develop them. The entire RC helicopter market will fit on the head of a pin, in the scheme of things. You're not talking about a huge market. If you think you are "getting ripped off" you don't know what engineering and manufacturing of a new design costs. I would like to see an affordable digital fuel injection sometime soon. OS has an entry in that area now, but it's big dough......Sorry for the killer post!.....later...Al
04-21-2002 Over year old.
 
 
azfaith
Heliman
Location: Las Vegas

IMZ Sceadu

Blade.
I beleive the engine is broke in, at about 6 gals through it. PS I am only running 15%-works fine for me;I can only imagine what 30% would do for it. I don not know what else to say about it. I adapted the factory 50mount. On the non carb side I simply drilled new holes in the motor mounting rail. on the carb side I drilled and tapped the lower bolt hole in the mount. I had to use a die grinder to flair out the top of the mount as the IMZ is about a 1/16" too wide. I never got the fourth bolt in the mount. The engine holes line up just inside of the mount. they could both be drilled and tapped but would not leave any meat on the mount. So I opted to off center the mount just a hair towards the bottom of the heli. I figure with the two bearings supporting the output shaft it would be OK. Also the muffler is on the wrong side and required frame mods. No biggie to me.
04-21-2002 Over year old.
 
 
Optech
Key Veteran
Location: Vista/Oceanside, CA.

IMZ/Sceadu pics

Here's some pics of Azfaith's IMZ engine in a Sceadu conversion.







Later,
Mike

Viva La Airtronics!
04-21-2002 Over year old.
 
 
Carps
Veteran
Location: Caterham, Surrey, England

IMZ 50 nitro recommendations

I have just ordered an IMZ50, and was wondering if someone could tell me the recommended nitro %. I was planning on running on 5% if possible - anyone know if this will be OK ?

Cheers

Andy
04-21-2002 Over year old.
HOMEPAGE  
 
 
Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

Thanks for the pics Mike. I wish we had some of that AZ weather! Andy, where did you order from?
04-21-2002 Over year old.
 
 
Carps
Veteran
Location: Caterham, Surrey, England

I ordered from CyberHeli, as with most of my stuff now. I also ordered the Voyager 50IMZ 'copter to put it in

Superb service. Very fast. Very helpful. And decent prices.

Can't wait 'til it's delivered...

Andy
04-21-2002 Over year old.
HOMEPAGE  
 
 
rickc
Elite Veteran
Location: Creve Coeur IL. (Peoria Area)

The instructions for the IMZ 50RV calls for 30% nitro, I can see 15% doing ok but with only 5% I'm not sure. You will have to let us know. I too ordered my Voyager IMZ from Cyberheli. Stephen can get some upgrades that a couple of us have made. They make a carbon fiber bottom plate as well as aluminum tail boom mounts. We also went with the KSJ double pitch slider for the tail. I can't wait to burn more fuel. It has been raining and windy, not a good combo.

Rick
04-21-2002 Over year old.
HOMEPAGE  
 
 
Carps
Veteran
Location: Caterham, Surrey, England

Where do you get the double pitch tail slider from ?
I can't find anywhere here in teh UK

Cheers
Andy
04-21-2002 Over year old.
HOMEPAGE  
 
 
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Ron’s HeliProz South . Century Helicopter . MTA Hobbies

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Engines Plugs Mufflers Fuel > 50 Class IMZ Competition Engine
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