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Old 04-20-2008, 08:07 PM   #1
Flying freak
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Default Moki 1.8 or 2.1

What would you replace an mvvs 26cc with?

http://www.morrishobbies.com/product...roducts_id=452

Im thinking the moki 2.1 but maybe it will be to heavy?

This will go on a 24% extra i know its hugly over powered but it balanced nice with the mvvs soo... id rather not add lead...

Steven

Last edited by Flying freak; 04-20-2008 at 09:38 PM. Reason: its not a 24% edge its a 24% extra 300
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Old 04-20-2008, 09:09 PM   #2
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Default Re: Moki 1.8 or 2.1

The 2.10 should be a great match - it is barely heavier than the 1.80 anyway.
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Old 04-20-2008, 09:15 PM   #3
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Default Re: Moki 1.8 or 2.1

Why the switch from the MVVS?

One thing I will worn you about is accessories for Moki's are limited. You will find different exhaust available but a lot of people have trouble finding mounts for them anymore. At JTEC we no longer have mounts available due to the low demand for the engine.

The other thing is since Moki's are a European engine they like very little nitro so make sure you read through the instruction manual and go with the fuel they recommend.
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Old 04-20-2008, 09:26 PM   #4
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Default Re: Moki 1.8 or 2.1

Moki is a great engine and I am pretty sure the Mark line is the same thing. Since it has rails mounts are no problem. I used their after market radial mount on mine.

I can't imagine any quarter scale ( 72 inch ) aerobatic bird that could need the 2.10. Unless it was a 13lb plane and you wanted to go ballistic.
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Old 04-20-2008, 09:43 PM   #5
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Default Re: Moki 1.8 or 2.1

well the mvvs would hover it at 90% power so more power is needed

the plane should come out around 12 pounds 72 inche wing span and be ballistic

I could probably go with a 1.20 and have enough power but than id have to add lead to get it to balance so why not just over power the h*ll out of it and have a blast

I lvoe the fact it needs no nitro it means i can easily and cheaply mix my own fuel

I know and extra 300L isnt the biggest 3d machine but it will fly one season with the moki and hitec 5955's before one of 2 things happens
- rebuild to increase control surface size and deflection for next year
-or rebuild cause i ripped the wings off!

What pump should i use so i can have the fuel tank on the cg, how big a tank do i need?
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Old 04-20-2008, 09:59 PM   #6
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Default Re: Moki 1.8 or 2.1

A 16 oz tank will give you just about 10 minutes or so, depending on your flying style, a 20 oz may be a safer bet. The Perry VP-30 (the blue can) is the perfect pump for the Moki 2.10 and I highly recommned it - constant fuel pressure is key to maximize tuning on your Moki. A stock 2.10 will run its best on 5% nitro with castor lubricant (as opposed to synthetic) Power Master 5% is perfect, though I used to mix FAI and 10% as my LHS didn't stock straight 5%. It will take every bit of 5 gallons of flying to break-in a new Moki and get the most reliable performance out of it. The Mark series is exactly the same as Moki. The original importer still owns the name Moki in the US and the relationship with teh Hungarian manufacturer went sour, so now the engines are sold as Mark to get around the situation. I flew my Moki 2.10 in front of a 13 lb 80 inch Extra and it was a great match - you don't have to rip holes in the sky at full throttle, but it's nice to have good vertical performance when you want it.
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Old 04-20-2008, 10:03 PM   #7
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Default Re: Moki 1.8 or 2.1

I have had both the Moki 1.80 and the Moki 2.10. Either one will outperform the 26 cc engine. I have mine on fun-fly planes in the 12 pound range. I mix my own fuel - 5% nitro. At full throttle the 2.10 will use up over 2 ounces of fuel per minute. But on a light plane, I tend to fly at half throttle or less much of the time. I have only a 12 ounce tank for the 2.10 and fly 10 minutes at a time.
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Old 04-20-2008, 10:22 PM   #8
Flying freak
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Default Re: Moki 1.8 or 2.1

Wow! you guys a quick today!

Ok a few more Q's

Do i need large id fuel tubing? if so any suggestions? drill out the clunk?

A few prop suggestions? Maybe somthign from vess?

Also what beam motor mount do you use?

Steven
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Old 04-20-2008, 10:58 PM   #9
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Default Re: Moki 1.8 or 2.1

You must use large ID fuel tubing inside the tank all the way to the carb. And drill out the clunk. Alternatively, use the Cline pressure/regulator system. This is what I do. Then you can use medium tubing because the tank is pressurized. I use an APC 20x8 on the 2.10 (plastic prop). Have not tried a large variety. On the 1.80 I use a 18x10 Zinger. I have an aluminum motor mount for the 1.80 and the 2.10 is mounted on a profile fuselage onto the beams built-in to the fuselage.
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Old 04-20-2008, 11:04 PM   #10
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Default Re: Moki 1.8 or 2.1

I run my Moki 2.10 on the suggested 3/32" I.D. fuel line from the manual (I think that's referred to as 'standard') with no problems. I did not drill out the clunk. As Flyinhigh said, the VP-30 is the way to go. As for a mount, I've been using the GP black fiber/plastic mount that came with my GP Patty Wagstaff with no problems: http://www3.towerhobbies.com/cgi-bin...?&I=LXATG7&P=7. I have a 20 oz. tank in there and after about 12 min. of IMAC flying, I land with around a 1/4 to 1/3 of a tank left.

Doug

Last edited by magicswanson; 04-20-2008 at 11:05 PM. Reason: forgot to specify which Moki
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Old 04-20-2008, 11:09 PM   #11
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Default Re: Moki 1.8 or 2.1

Check out this thread for more info...:

http://www.flyinggiants.com/forums/f...e-install.html

Doug
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Old 04-20-2008, 11:12 PM   #12
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Default Re: Moki 1.8 or 2.1

For props, a TBM (NX, Bolly, JFX, Xoar etc) 20X10 to 22X8 or that range is the way to go, once the engine has developed its power. Bisson makes a great muffler for Moki's, BTW.
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