Electric Motor Specs

[38Super]

This isn't much of a question for the designers out there, but it seems more appropriate here than in the general discussion area.

The amp draw on electric motors as shown in "Nav Guides" is quite low compared to published specs on a number of websites for the various motor/prop combinations. Is there some way to tweak the motor specs to get numbers that more closely match the measured values?

Thanks

[opjose]

No it's not "low" rather it's realistic.

The AMP draw posted on manufacturer's web site are based upon ideal conditions.

This includes a constant voltage/amp source.

The second you fire up a motor, the voltage level of the batteries begins to drop.

Quickly at first, then it settles in to a somewhat slowly degrading linear drop ( for Lipos ).

This supresses the manufacturer stated levels.

Also the manufacturers are stating specific load amounts.

Point the plane straight up and you'll see the amperage draw INCREASE with the same setup.

All of this is realistic.

Add to that many other inefficiencies and you end up with a power level which is less than what the manufacturer states.

Most of us complain about TOO POWERFUL motors in G3 & G4, because once we fly the real things we discover that the electric motors in the sim are just too powerful compared to reality.

KE has appropriately toned them back down in the G4 updates, but the initial release saw uncharacteristically high performance levels.

If you want to match what the manufacturer says, ONLY do so in the editor view.

You'll find that with the appropriate prop and battery selection, this will far more closely match specs.

Use the same combination in the navguide view and AMP/HP/WATT power levels drip... this is right on the money.

BTW: I had been so enamoured of the performance of the Electrifly Reactor 3D EP in G3/G4, that I purchased the same motor modeled in the sim, which is NOT what Electrifly suggests.

Using the G3/G4 combo not only mimic'd the behaviour in the sim, but it was a far better flyer than with what Electrifly recommends...

That's how good G3/G4 gets it.

[Blade Scraper]

No it's not "low" rather it's realistic.

The AMP draw posted on manufacturer's web site are based upon ideal conditions.

This includes a constant voltage/amp source.

The second you fire up a motor, the voltage level of the batteries begins to drop.

Quickly at first, then it settles in to a somewhat slowly degrading linear drop ( for Lipos ).

This supresses the manufacturer stated levels.

Also the manufacturers are stating specific load amounts.

Point the plane straight up and you'll see the amperage draw INCREASE with the same setup.

All of this is realistic.

Add to that many other inefficiencies and you end up with a power level which is less than what the manufacturer states.

Most of us complain about TOO POWERFUL motors in G3 & G4, because once we fly the real things we discover that the electric motors in the sim are just too powerful compared to reality.

KE has appropriately toned them back down in the G4 updates, but the initial release saw uncharacteristically high performance levels.

If you want to match what the manufacturer says, ONLY do so in the editor view.

You'll find that with the appropriate prop and battery selection, this will far more closely match specs.

Use the same combination in the navguide view and AMP/HP/WATT power levels drip... this is right on the money.

BTW: I had been so enamoured of the performance of the Electrifly Reactor 3D EP in G3/G4, that I purchased the same motor modeled in the sim, which is NOT what Electrifly suggests.

Using the G3/G4 combo not only mimic'd the behaviour in the sim, but it was a far better flyer than with what Electrifly recommends...

That's how good G3/G4 gets it.

Opjose, I just have to say you are one of the most respectful and helpful people around here! :) You take the time to answer multiple questions and you really know alot obout RF. I'd like to give you a nice hand shake, but the internet doesn't do that yet! :D