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moki 1.80 prop question

Old 12-01-2005, 11:09 PM
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WeAkEndDFLyER23
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Default moki 1.80 prop question

I just got a new motor moki 1.80 for my extra 300s 74' I was doing search about the best prop for 3D Most guys use 18x8
I was wondering if APC 18x6w wold be okay. since what I have in hand right now..


Old 12-01-2005, 11:21 PM
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FlyingPilgrim
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Default RE: moki 1.80 prop question

I believe 18x6 will be too small, should use 18x8.
Old 12-01-2005, 11:56 PM
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WeAkEndDFLyER23
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Default RE: moki 1.80 prop question

Do you think this engine would give my 13-14lbs extra 300s enough power to pull out of the hover? with 18x8
Old 12-02-2005, 01:48 AM
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Default RE: moki 1.80 prop question

Yes.
Old 12-02-2005, 07:49 AM
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RTD
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Default RE: moki 1.80 prop question

I use a Bolly CF 19x8. It seems to work really well, allowing the engine to spin around 8300 RPM - I tune it rich for 7,700 RPM. A club member tried an 18x6 and it was no where near enough prop for this motor as evident by the thing screaming and the blade tips going super sonic, man was that thing noisy!. He's now using an 18x10 which is keeping the RPM and the noise to acceptable limits. Another club member was using a 21x6 which provided excellent static thrust for good 3D performance of his extremely light aircraft. You will need a bigger prop than the 18x6 and probably bigger than the 18x8 too ... depending upon your type of aircraft and flight performance that you want.
Old 12-02-2005, 09:25 AM
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Default RE: moki 1.80 prop question

For break in that 18x6W is perfect. Just keep the RPM's under 9000 by tuning the high end needle.

After a few gallons, try Bambula 18x8 from RC showcase. That's what I use. They are VERY light and have great thrust. Mine turns 8400 slightly rich (300 RPM to peak). THis engine can pull around my 14 pound CAP232 with authority. It's perfect for your plane.

Also try MSC, Menz, Bolly, Airwild NX, or BME. Use only wood props for the lightest weight and fastest transition.
Old 12-11-2005, 01:46 PM
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Default RE: moki 1.80 prop question

Thanks guys I have a Gp extra 300s 74'. I just finnised installing my moki 180. and all ready to go this thursday. I have a Top flight 18x8 for now. any good?
Old 12-11-2005, 03:54 PM
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Default RE: moki 1.80 prop question

Top flight 18x8 sounds good to me. Just keep the high end rich until you have a few gallons through it (300-500 below peak).

ORIGINAL: WeAkEndDFLyER23

Thanks guys I have a Gp extra 300s 74'. I just finnised installing my moki 180. and all ready to go this thursday. I have a Top flight 18x8 for now. any good?
Old 12-12-2005, 06:32 PM
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Default RE: moki 1.80 prop question

I'm going to order a APC 19X8 to run on my OS 160FX. It will be pushing the limit on my engine but would probably be perfect on yours after it is fully run in.
Old 12-13-2005, 06:15 PM
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Default RE: moki 1.80 prop question

APC 19x8 turns 8000 RPM on my Moki 180 w/ Bisson Pitts muffler & 5% nitro fuel. It's the prop with the highest thrust out of all the props I've tried on that motor. Response does seem to be a little slow, as it is heavy.
Old 12-14-2005, 01:33 AM
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Default RE: moki 1.80 prop question

were do you get APC 19x8 prop?
Old 12-14-2005, 06:12 AM
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Default RE: moki 1.80 prop question

Landing products.
Old 12-14-2005, 08:55 AM
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Default RE: moki 1.80 prop question

Those APC's are so darn heavy at this size, that's the only thing I don't like about them. But yes they are the thrust kings, very efficient props.
Old 12-22-2005, 10:10 PM
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Default RE: moki 1.80 prop question

I flew my extra 300s with TF 18x8 with no problem lots of power and authority while on the rich side.

What do you guys think of bambula props compared to Top flight? I need to get a new one soon. my TF was damage while landing.
Old 12-22-2005, 11:47 PM
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Default RE: moki 1.80 prop question

I have Bambula props (18 x 8 ) on both my Moki 135's, one in a Pacific Gee Bee and the other in a CMpro Christen Eagle and both pull exceptionally well. I have both read and found from experience that Moki's seem to like props on the larger size. Bambula's are nearly always balanced spot on out of the bag and are very well made, although like all wood props split easily if they touch mother earth. The new Bolly wood props are nice too.

I have an 18 x 8 Master Airscrew (classic Series) prop on my OS 160 on the front of the big Cmpro Giles 202 and it is a perfect combination, giving unlimited vertical. It is a bit heavier than the Bambula but it saved extra lead on the nose.

Rod.
Old 12-23-2005, 02:38 AM
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Default RE: moki 1.80 prop question

Thanks guys I just orderd some prop 18x8 bambula from RCS
Old 12-23-2005, 08:47 AM
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Default RE: moki 1.80 prop question

Perfect prop for that engine. You will like the vertical.

ORIGINAL: WeAkEndDFLyER23

Thanks guys I just orderd some prop 18x8 bambula from RCS
Old 12-23-2005, 10:21 PM
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Fuelman
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Default RE: moki 1.80 prop question

The wood Master Scimitar 19x8 was a great prop for the Moki 180 also, much lighter than the APC. Spooled up quick and flew nice.
Old 12-24-2005, 12:31 PM
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Default RE: moki 1.80 prop question

I wonder how well this does as a 3D prop? Will it provide good downline braking and lots of thrust at low air speed? Tower's site says that it has good thrust at low RPM's. Must mean that it's efficient at low R's.

ORIGINAL: Fuelman

The wood Master Scimitar 19x8 was a great prop for the Moki 180 also, much lighter than the APC. Spooled up quick and flew nice.
Old 12-24-2005, 01:17 PM
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Fuelman
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Default RE: moki 1.80 prop question

I like it because it has very nice pull at all rpm's, I have not 3-D'd that prop but I can't imagine it would be bad since it has a nice wide blade and the Moki 180 seemed to pull it through low and mid range with authority.

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