Higher kV is higher rpms but the motor also has to have the mass (be big enough) to supply that rpm to the fan. You have to think of it as a set, the motor, fan, and shroud all add up to a good (or not so good) set up. Also be careful as some fans have different mounting and the fan adapter on the motor needs to match. In my opinion buy a EDF unit as a set so you know it will all work together. Some of those fans are 9 bladed and some 12 and not all 12 bladed fans are the same.
Also many time the stated kV is just not right, high or low. Also stated thrust numbers are very often not what you will get with that unit in the plane. Most times the numbers are uninstalled numbers and you'll have about 15% less installed. Also some give a rating using a power supply not a battery and many times the voltage setting on the power supply is unrealistic. For example they may use 25V but even on a fully charged battery you'll probably be at 23V, or even less. A lot of sites and even people, here on line, post totally unusable numbers or don't say how those numbers were obtained.
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My bad, I meant 1960kv as the current motor supplied. If lower kv = more thrust, am I correct in assuming higher kv = higher speed (all inrunners). Is the high thrust motor this one? https://www.motionrc.com/products/fr...motor-mi040683Leave a comment:
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Best as in the most thrust? The inrunner 1750 is the latest HP and has the most. The 1960 is the current standard power and while it makes less power it has a plastic shroud and is overall a good unit.
The 1835 is the old HP. The 1900 is the old standard power and the 1750 out runner is just old low power. I don't know where you saw a 1950.
Originally posted by F4U Corsair View PostLeave a comment:
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Im a learner too always hav been wondering about checking thrust,,... figures ive seen,,, 3.7 kg thrust... 90 mm 6 s, as read from manafactureres ,, was wondering,, is that measured with motor on a box( just mounted) or a plane on its wheels... ready to go. Inc its weight it will b here sooner than i thought,,, (arive ) lol im hopeing.. hve decided to do my first detaled cockpit,, we will seeLeave a comment:
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Confused ...perplexed...wondering...will I ..wont I .....been all over the place choosing a new motor for the grey F4. Finally settled on the one advertised with the highest thrust given in the specs. That suits my simple brain! The one removed was the Freewing 1850kv . The new one is supposed to be V2 1750kv of that motor with a deeper changed aerofoil section on the blade, The wires are a fair bit thicker whatever that means. Flight time was usual 3.5 ish from take off to touchdown. Battery was a 6000 HRB. Just hooked it on charge this morning and was good at 3.7- 3.8 . As I say, the main objective was getting off the grass smarter and that seems to have been the case.
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Can i ask what kv and flight times with previous motor thanx lockarrowOriginally posted by locharrow View PostYesterday high winds and pi##ing rain……woke up to overnight hard frost and a bright sunny calm day . Managed up for one flight with the new 1750, (dog walkers arrived ). Certainly more powerful than the Freewing one it replaced with a slightly louder whine but pleasant enough. All in it was worth it with power gain better than 5% but I would not go as far as 10%. Grass take off was a good bit smarter which was the whole objective. Recommend? Yes .
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Ok, I’m confused. I’m reading 6s with 1835kv, 1750kv, 1900kv, and the upgraded 1950kv motors. Which is the best setup for 6s power?Leave a comment:
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Yesterday high winds and pi##ing rain……woke up to overnight hard frost and a bright sunny calm day . Managed up for one flight with the new 1750, (dog walkers arrived ). Certainly more powerful than the Freewing one it replaced with a slightly louder whine but pleasant enough. All in it was worth it with power gain better than 5% but I would not go as far as 10%. Grass take off was a good bit smarter which was the whole objective. Recommend? Yes .
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No.Originally posted by Elbee View Post
Edit......just installed new 1750 into the old hack to give it a run. The Freewing that came out was a good motor but when I was fiddling with the two I noticed the blades on the new one are deeper and much more resistant to spinning with my finger. They were really jerky whereas the old one spun quite easily. That may mean something to you boffins out there but to me it is just "different"
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Old 461 is carrying some iron! I wonder if it had a center mounted gun pod as well?Leave a comment:
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Well LB, my beast has been up trees, sword danced and dropped, hit ball ditches, been lost and found twice, put the U/C up through the wings once .....very little pilot error of course..... and still has the original wings and empennage ...new body couple of years back... but still cuts the mustard in the air. Have a new Camo RTG in the garage and the new Marine guy but still like ol' faithful. Now, if I had a 29 yr old blonde in the garage I'm not so sure about the other ol' faithful in my life....
...Hope she doesn't read this.....
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" Some inspiration, as if you'll need any. Best, LB" ............Don't need inspiration like this LB, you make my F4 look like a beat up old hack (which it is) !!!!! Was out today again, bit breezy but not bad. Switched on the trans. putting all the switches to off, connected up the plane, half flaps ...gunned it, took off great....up into what I thought was a hurricane. Plane was all over the place, ducking and diving. Dawned on me that I had not switched the gyro on ....man it was like chalk and cheese, plane settled down a lot although it was still gusty way up. The new Freewing 1750 arrived this morning so that is this evenings job!!!
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Probably McConnell AFB, Wichtia, KS.Originally posted by Coconut View PostLeave a comment:
Best, LB
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