jcrankshaw
So when it comes to props, we know that the MJ V3 can run a 6x4 on a 3S or a small range of other props on 2S. Its stated clearly on graysons website and throughout this forum.

What I cant find is how people know which fan units to match up with certain motors. I think the RC industry is making it real hard to simplify the matching process when it comes to EDF units. I know there are 100's of possible combination for one motor or fan unit but come on...

If I were selling EDF motors, I would state: This 5000KV motor fits the following fan units on using the following batteries... then provide like 4 of the most popular or most efficient set ups.

So how do people know? Learn me about this
~~~~~~:bleh:JCrankshaw:bleh:~~~~~~~~

Jeff Crankshaw

My website: http://www.fairviewrcflier.webs.com

My email is: [EMAIL="fairviewrcflier@gmail.com"]fairviewrcflier@gmail.com[/EMAIL]

My YouTube Channel is: FairviewRCflier: (http://www.youtube.com/user/FairviewRCflier?feature=mhum)

F22v2 EDF:

F22v2 on a 4S with Megajet:
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JettaManDan
There is no real solution...basicially you take a shot at it..most of the motor listed on hobbypartz for example or hobbyking give the size of the EDF it fits..but even then the mounts and the fans are not really a matching set...honestly? to make it easy..buy a EDF as a whole package - motor and fan...

like this..

http://www.hobbypartz.com/88e-adf64-300xl-kv5250.html

general rule is the higher the KV on a EDF motor..the faster it spins...and the higher top speed..but the lower torque at lower speed....

so this one for example...

http://www.hobbypartz.com/88e-adf64-300l-kv4300.html

would be suitable for a plane that fly's slower and you want more low end performance out of..

i trid to make my own EDF set and failed right away..had a spare 55mm EDF motor for my A-10 - bought 2 different 55mm fan's for it..and neither fit...the collar was different, the shaft was different..and the shaft length was too long...when i build my Mig-29 EDF this winter..i'm going to just buy a matched unit and drop it in...will save time and hassle and $$

another example i was looking at...but not as high speed a setup..

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11166

buy the motor and fan together is my opinion..and get a KV rating that works for what you want...lower KV means an easier toss and slow speed power..higher kv means a harder toos and higher top speed usually...for a 64mm fan i'd go with 4300kv or higher personally..
My YouTube Channel - 250+ Video's! http://www.youtube.com/jettamandan09

I'm an R/C Junkie! 40+ planes - 12 Heli's - 6 multirotors - and ground vehicles galore! I've got issues.
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jcrankshaw
While we are at it... What the heck is that....(see pic)
~~~~~~:bleh:JCrankshaw:bleh:~~~~~~~~

Jeff Crankshaw

My website: http://www.fairviewrcflier.webs.com

My email is: [EMAIL="fairviewrcflier@gmail.com"]fairviewrcflier@gmail.com[/EMAIL]

My YouTube Channel is: FairviewRCflier: (http://www.youtube.com/user/FairviewRCflier?feature=mhum)

F22v2 EDF:

F22v2 on a 4S with Megajet:
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teflondon
its something that protects your receiver from interference
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JettaManDan
could be..or a Flux Capacitor
My YouTube Channel - 250+ Video's! http://www.youtube.com/jettamandan09

I'm an R/C Junkie! 40+ planes - 12 Heli's - 6 multirotors - and ground vehicles galore! I've got issues.
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blaumph2cool
Quote:
could be..or a Flux Capacitor

Bahah. MARTY!
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jcrankshaw
Nice!
~~~~~~:bleh:JCrankshaw:bleh:~~~~~~~~

Jeff Crankshaw

My website: http://www.fairviewrcflier.webs.com

My email is: [EMAIL="fairviewrcflier@gmail.com"]fairviewrcflier@gmail.com[/EMAIL]

My YouTube Channel is: FairviewRCflier: (http://www.youtube.com/user/FairviewRCflier?feature=mhum)

F22v2 EDF:

F22v2 on a 4S with Megajet:
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hamburgrd
In general larger fans use lower KV motors because you will be using larger batteries than 3 cells. As most people have found out; you really don't get good performing jets until you get into 4 cells and 70 mm EDF units.

These are my rules of thumb for EDFs.
1. You get what you pay for.
2. Go for 70mm (64 mm with 4 cell in some cases)
3. If you decide on 64 mm make sure it is a small wing span. (24" or smaller)
4. You get what you pay for.
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Argonath
Quote:
While we are at it... What the heck is that....(see pic)



It's a ferrite core. It's used in Chokes to reduce EMI / RF interference in electronic circuits and in this case as Teflondon stated, it's used to reduce interference with your RX / TX Communications.
D.I.L.L.I.G.A.F.
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MoTheG
you could do the math or use available calculators.
there is less info than on props but basically it is the same problem.
If it can not fly with NiMH it is not a plane.
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