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Home › ✈️Aircraft › 🚁Helicopter › Gaui NX4 NX7 › Gaui NX7 › NX7 kit fit a 9.5MM size crankshaft engine?
10-19-2020 04:54 PM  35 days ago
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kenneth8

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NX7 kit fit a 9.5MM size crankshaft engine?
Anyone know if the NX7 Kit will fit an engine with a 9.5MM crankshaft? I could not find the innner diameter of the fan/clutch assembly in the manual to see if it would bolt up to an engine with a 9.5MM crankshaft. Thanks in advnance.
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10-19-2020 05:26 PM  35 days ago
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Rojoalfa

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Wait a minute!

This kit is not from Mars!

This kit is a class 90 helicopter.

The fan should be for class 90 motor shaft, that is 3/8" shaft diameter or metric equivalent. (9.525 mm)

If for some reason, the fan has a bigger hole, that kit must supply the conical brass adaptor.

For example, when "miniature aircraft" put their fan with bigger hole for tempest and stratus kits, they run the #0546-6 part to fit the crankshaft to the fan.

So, no surprises with this new kit...

/Saludos cordiales,
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10-19-2020 06:56 PM  35 days ago
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kenneth8

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should be....I was looking for a NX7 owner who would know that measurment. Thanks for the help.
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10-21-2020 10:43 AM  33 days ago
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Rojoalfa

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Now I understand what your point is.

The Instruction manual said nothing about motor size!!!

It is not obvious, BTW.

According to helicopter size, we see that is a 700 series, 91 class. Instruction manual said nothing about it.
No warnings... Nothing.

I can think about install a Os55hz, 50 class, but it doesn't fit on motor base..!

NX7... So, the seven, 7, said everything?...

/Saludos cordiales,
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10-21-2020 02:13 PM  33 days ago
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kenneth8

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I was looking at the OS15HZ gasser engine. its on the compatible list in the NX7 manual. But I found two versions of the engine. RCjapan has a 9.5MM crankshaft version. And the Gas powered thoughts website..... their GT15HZ has an 8MM crank version. Wondered which one would fit the NX7 kit? An engine is an expensive purchase that can't be returned if it does not fit.
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10-22-2020 02:10 AM  33 days ago
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Rojoalfa

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Big problem!

When someone said compability with 90 class motor, I know for sure is for motors with 3/8" or 9.525 mm diameter shaft.
That is the standard!

So, 8 mm diameter motor shaft is not an standard in 90 class helicopter.
Probably your are talking about an airplane standard.

Let us know about this "special" 8 mm shaft diameter motor.

/Saludos cordiales,
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10-22-2020 02:42 AM  33 days ago
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kenneth8

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Helicopter Engine, not airplane. The one with the 8MM crankshaft mentioned above says "90 size 8mm crankshaft - fits most 700 class fan/clutch/hubs" on their web site, so it made me wonder which one fits this kit, Thanks.
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10-22-2020 01:17 PM  32 days ago
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Rojoalfa

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Advertising very convenient!

So, they suggest to modify the fan HUB to assembly correctly this motor. That is Depend upon the HUB, of course.

Probably you will need to tight the bolt a little bit more or maybe to run a brass bushing in between.

Bad... Very bad.

/Saludos cordiales,
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