madhun

Does anyone have some information about this engine?

All I know is that its weight is 1360 gr. without ignition an it puts out 8,5 HP at 7.800 1/min.

Volfy

My Feedback: (23)

You talking about this one?

http://morrishobbies.com/mvvs/58cc_gasser.html

Looks very interesting, but I'm certainly not holding my breath for it's introduction.

Diablo-RCU

My Feedback: (1)

My guess is that we'll see the MVVS 58 and Brison Revolution 52 before we see the BME 55.

madhun

Yeah, that's the engine. Seems like someone was a little over-enthusiastic about the engine's weight . Still it's outstanding!

I called a German MVVS dealer, and he said the engine would be available this month. However, this information is 1 month old.

rc34074

My Feedback: (5)

why does it have that short nose? need to get that prop further out from the block i think. especialy on a purpose built engine.

maybe an inch or two.

wonder if they have a muffler, and what it would weigh with the muffler?

ed

madhun

As far as I know, MVVS is now working on mufflers for this engine. I'm certain they will come up with a tuned pipe very soon, because the power has been determined using one on the engine. But I guess a standard muffler is also planned.

GeraldRosebery

My Feedback: (14)

Whicher way you slice it, dice or lie about it, there is no way a 58 cc engine is going to out-perform a modern design 80 cc powerplant. End of story. It may be a lot lighter if well designed and have a better power to weight ratio, but it is NOT going to be more powerful (not unless it uses something else other than gasoline for fuel).

f2racer

You guys think this would be enough engine to hover, say a Aeroworks 31% Edge 540T ARF? It says that a Zenoah G62 gives it unlimited vertical...

nyrcpilot

My Feedback: (5)

I think the nose was made short for a reason, this engine is purpose built, built for 31-33% airplanes, you are going to need the bulk of the weight as far out as possible for balance.


I agree that this engine looks a little over rated @ 9.5 hp, but for some reason many manufactures have over looked the idea of a high compression engine that runs on 100-110 octance fuel. This fule is only $3.50 a gallon, and could make a world of difference on one of these engines.

Also 9.5 hp may be great, but history shows when you tweak a gas engine of this size it is hard to keep the torq, if this engine has no mid range, but a real hard hit on top it will only be good for warbirds and such. Think of a 125cc motorcross bike, a lot of power.....but it is all on top, you have to ring it out just to get it to make power.

Diablo-RCU

My Feedback: (1)

I see on the Morris website they show some dyno charts with max pwer at around 7000 rpm. The numbers and the curves look mighty impressive. However, if it did make 8+ HP, it should turn a 26x10 prop in the 6500+ rpm range. They quote a 22x12 prop at 7,000 rpm.........not anywhere near that dyno reading for power.

As for motocross engines, a good 125cc single makes 30+ HP at around 10,000 rpm. A 58cc engine tuned for 8-10 HP at 7,000 rpm won't be quite as peaky.

nyrcpilot

My Feedback: (5)

Let us not forget that a 125cc motocross bike is also liquid cooled, has a longer stroke, power valve, flat slide carb, and the head is taken down for high octane.

So take a 58cc air cooled to 8.5 hp and you are tweaking it, do you think the other manufactures stop at a certain HP for a reason?


Case in point, I have a os 46, I was told when I got ready to buy another to buy the TT pro 46, I did so......sure the TT makes more power, about 400-500 rpms more same prop, but the TT has no mid range....hovering is next to impossible with the plane it is on.



IMO these engines should be rated on torq, and that should be the direction for improvement, bigger props, 3 and 4 blade, with less noise.....even tho I love the sound of my big gassers on fly buys spinning 2 blade props, noise chased motocross out of my life, and the same could happen with RC if we are not careful.

Diablo-RCU

My Feedback: (1)

Low end torque isn't very important to any engine spinning a prop. That's because the prop load increases exponentially with rpm. That means it requires very little power to accelerate the prop from low rpm or to hold a constant mid rpm. If your engine has flat spots in the power band where the mixture isn't correct, that's typically a carb issue.

If you like to hover a .45 glow engine....try a YS 45. It'll eat the OS up for power and is super responsive over the whole throttle range.

f2racer

I just noticed that the MVVS 58cc will be available from Morris in July. Anybody have any more info about this engine? Looks interesting...

Diablo-RCU

My Feedback: (1)

Has anyone called up Morris to ask how much the engine costs on the Pre-introductory special? Also, does it come with a Vlach ignition? If so, that might be a reason to give it a pass.

f2racer

Off the Morris website, if you click on the HP graph, it takes you to a preorder page for the 58cc. It looks like the intro price is $599.95. Don't know about the ignition...