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MOKI RADIAL Care and Maintenence

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Old 08-23-2011, 05:52 PM
  #1426
Scott Prossen
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Default RE: MOKI RADIAL Care and Maintenence

Awesome Mick! She's a star. Great paint job....did you do it? Looks like a Mercury Metal paint finish....beautiful.
Bring it over here to Top Gun and show it off. I'll get you an invite and a place to stay!

Have fun Buddy,
Scott
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Old 08-23-2011, 11:25 PM
  #1427
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Default RE: MOKI RADIAL Care and Maintenence

No Scott it was a factory finish. Tell me more about TG.

m
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Old 08-25-2011, 05:15 AM
  #1428
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Default RE: MOKI RADIAL Care and Maintenence

Updated PowerFuel HV380 fuel pump diagram.

Best regards,

Götz

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Old 08-27-2011, 12:18 AM
  #1429
René G.
 
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Default RE: MOKI RADIAL Care and Maintenence

Hey Guys,

Have you already seen this????

http://s1.directupload.net/file/d/2629/eh82ba28_jpg.htm

It's the brandnew Moki 7 cylinder 250ccm. Available in the beginning of 2012.

greetz from Germany

Rene


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Old 08-27-2011, 09:10 AM
  #1430
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Default RE: MOKI RADIAL Care and Maintenence

That's not the only new engine by Moki, expect one more announcement when it comes to their radials [8D]
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Old 08-27-2011, 10:56 AM
  #1431
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Default RE: MOKI RADIAL Care and Maintenence

Goetz, I would love to see Moki make a 75 to 100cc 5 cylinder radial that has that big sound, and use those little plugs like what are found in the Saito gas engines, and come with a turbulator and..............Those huge airframes are too much for me and my shop!.....Tom
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Old 08-27-2011, 11:04 AM
  #1432
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Default RE: MOKI RADIAL Care and Maintenence

Goetz,

Looks like a seven cylinder "180" setting next to the 250. Close??
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Old 08-27-2011, 01:18 PM
  #1433
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Default RE: MOKI RADIAL Care and Maintenence

Hide and watch,
when the new offerings hit the market,there will plenty of Moki's in the classifieds of the "old" style for sale!
Some people just have to have the latest and want to be the first on the block to do so.
So everybody wins,maybe some people will finally be able to get their hands on a used one.
Hope fully the new ones will drive the prices down on the older ones, allowing more modelers to get these jewels in the air!
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Old 08-27-2011, 02:05 PM
  #1434
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Well this is one way to get rid of the old one...

Happend today...

Latest GPS readings was 150 km/h.

http://jarkko.pictures.fi/kuvat/f4u_...7082011028.jpg

And this is the first shot on shight. Nothing was moved.

The Moki 250cc is in the middle of the pile.

Reason for the crash was Weatronic malfunction. It stopped responding about 4 seconds before the crash.

So this was a 120" F4U Corsair (Don Smith drawings) since it not clear anymore.

As you may imagine the engine is not ok anymore. All of the cyliders were ripped of and the collector ring is now flat iron.

However. I did like the engine so I will buy a new one after I know that the Weatronic 2.4G will not fail me again. It was transmitter failure so I will buy the latets version and try it with something cheaper...
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Old 08-27-2011, 02:44 PM
  #1435
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Old 08-27-2011, 06:04 PM
  #1436
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Default RE: MOKI RADIAL Care and Maintenence

Sorry for your loss of a fine aircraft.[] The build pics show you had a lot of time in this bird, and the workmanship was great.

I like the power boat video. Reminded me of the air boats in south Alabama where I came from. Maybe you found a new use for the MOKI. I wonder if they make a pusher prop for the engine.

Do you have pics of the MOKI? I may be interested in what is left, broken or not if you want to sell.
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Old 08-28-2011, 05:27 AM
  #1437
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Default RE: MOKI RADIAL Care and Maintenence

So sorry for your loss. I like your state of mind. Let's get back to building again, with caution. I'm sure it will go better the next time.
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Old 08-28-2011, 10:29 AM
  #1438
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Default RE: MOKI RADIAL Care and Maintenence

How about a 7 cylinder 400cc??
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Old 08-28-2011, 08:42 PM
  #1439
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Default RE: MOKI RADIAL Care and Maintenence

Is there any reason I shouldnt rotate my carb 180 degrees on my 250? I've installed the turbulator and air filter.It sure would make things easier linkage wise if I can.
Thanks
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Old 08-29-2011, 02:33 AM
  #1440
Scott Prossen
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Default RE: MOKI RADIAL Care and Maintenence

No reason not too! If you find one after the fact please let us know???

Scott
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Old 08-29-2011, 02:48 AM
  #1441
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Default RE: MOKI RADIAL Care and Maintenence

Lucky flier, You can rotate the carb. Also please experiment, rotating and trying the two possible positions (180 to each other) of the turbulator can have differences in eveness of the fuel mixture to the 5 cylinders. -Tom
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Old 08-29-2011, 03:07 AM
  #1442
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Quote:
ORIGINAL: Maxam

Lucky flier, You can rotate the carb. Also please experiment, rotating and trying the two possible positions (180 to each other) of the turbulator can have differences in eveness of the fuel mixture to the 5 cylinders. -Tom
Tom and Lucky Flier,

the 215 / 250 engines are not as senstitive to very fine differences in the turbulator pitch as the 150 is, due to the smaller crankcase diameter.
It should be NO effect to try the other direction of the stator inside the turbulator.
On the 150 engines, the slightest changes are always recognizable. But once the setup is good, it will last

But it is NOT sure that even the 250 behaves the same after rotating the carb. Some do, some dont. You will have to try !
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Old 08-29-2011, 03:31 AM
  #1443
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Default RE: MOKI RADIAL Care and Maintenence

Detlef, My experiences match yours mostly. The 150 was very sensitive to different pitches of the stators. For the 150 you sent me three different pitches. For the 215 what I was referring to was not even touching the stators but rather rotating the whole turbulator. It doesnt seem to make sense to effect a change but it did! Because of you I have made turbulators for the OS Diastar and the Saito 200 Ti inline and have greatly improved the mixture distribution. Thanks Detlef! -Tom
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Old 08-29-2011, 03:51 AM
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Default RE: MOKI RADIAL Care and Maintenence

Scott, congratulations on your well deserved resent awards.[sm=thumbs_up.gif]
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Old 08-29-2011, 08:43 AM
  #1445
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Quote:
ORIGINAL: WARBIRDRCER

Sorry for your loss of a fine aircraft.[] The build pics show you had a lot of time in this bird, and the workmanship was great.

I like the power boat video. Reminded me of the air boats in south Alabama where I came from. Maybe you found a new use for the MOKI. I wonder if they make a pusher prop for the engine.

Do you have pics of the MOKI? I may be interested in what is left, broken or not if you want to sell.
Uploaded some pics of the engine

http://jarkko.pictures.fi/kuvat/f4u_...8082011044.jpg


And a closer look of the log files showed that the receiver had shutdown complitely. That is a logical reason not beeing able to control the plane anymore.

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Old 08-29-2011, 11:24 AM
  #1446
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Can't wait to see their new 7 cylinders !
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Old 08-29-2011, 12:13 PM
  #1447
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Default RE: MOKI RADIAL Care and Maintenence

Hi, I took My Moki 250 apart

Here as picture of the fuel distributor.

http://jarkko.pictures.fi/kuvat/f4u_...9082011069.jpg

Could someone explain to me the working principle?

And as for the turbulator, I do not understand how it can give any better performance with this type of distributor.
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Old 08-29-2011, 01:40 PM
  #1448
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Default RE: MOKI RADIAL Care and Maintenence

The fuel/air mixture leaving the carb is not equally distributed across the bore of the intake tract. At many throttle settings the fuel/air mixture is at one side of the hole into the crankcase thus one side is rich the other lean. -Tom
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Old 08-29-2011, 02:39 PM
  #1449
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Default RE: MOKI RADIAL Care and Maintenence

Quote:
ORIGINAL: jairaksinen

Hi, I took My Moki 250 apart

Here as picture of the fuel distributor.

http://jarkko.pictures.fi/kuvat/f4u_...9082011069.jpg

Could someone explain to me the working principle?

And as for the turbulator, I do not understand how it can give any better performance with this type of distributor.
As stated above, the fuel/air mixture (Atomization) is apparently inadequate by some standards.

When the intake air is drawn through the carburetor and fuel is introduced atomization takes place, however when the air/fuel mixture continues its path forward through the smooth 1 ¾” deep intake manifold to the crankcase, the fuel starts to separate from the air. This is intensified by the fuel being heaver than air, so when the mixture hits the rotating air inside of the crankcase the fuel can continue forward causing added separation. The turbulator assist the mixture in atomization and the vortices created helps to prevent the forward motion from separation as the mixture enters the crankcase. As the intake valves open, the mixture is ingested by the cylinder and we know the results of this. All round motors (Full Scale) suffer from the same distribution problems as the MOKI. There has been some advancement in round motor fuel distribution by adding fuel injection at the cylinders, or the use of a spray bar inside of the manifold to increase atomization. Maybe one day we will see one or both of these systems available for our model round motors.
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Old 08-30-2011, 04:29 AM
  #1450
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Quote:
ORIGINAL: RichardGee

[X(]HELP!
I am looking for intelligent opinion, or better yet, first hand experience with my question/problem![]

On flight #4 of my Thunderbolt, the Moki 250 began to run rough, missing and such... mostly at high throttle settings, but clearly something was not quite right with the engine. Upon taking the airplane apart for transport, I found the ignition module was quite loose on the back of the firewall as one of the 3 screws had come out and the module could literally flop around against the firewall.
I assumed this was probably the culprit as the engine had been running perfect earlier (and YES, I checked the carburetor pump/pressure line - it is clean)

Upon further inspection at home I found another problem... one exhaust outlet has broken off my collector ring!!!

As I have a warbird event in one day that I REALLY, REALLY would like to fly, can anyone give me an intelligent answer as to whether or not flying the engine like this will be a bad thing?? Other than the hot exhaust spraying inside the cowl[], what else might be a potential issue that could risk my engine or plane?

No doubt the collector ring must be removed to repair?? YIKES!
[][][]
HI RICHARD
As I am about to install my 250 am wondering if you came to a conclustion on the cause of the exhaust outlet problem, Did you only have the pipe fix at both ends with out support or supported in some way along the pipe.
REGARDS
JOHN
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