I did a few test flights this weekend of the CS70 with Turnigy L2855-2300 EDF Outrunner (450w) running on 4s in my RCB Kits F-35. Static thrust was very low. I can't measure it, but is was nowhere nere 1:1 on this plane that weighs roughly 1.1Kgs. I only did a static balance so that was not perfect. I will be building a jig where I can do dynamic balancing using my iPhone.
The F-35 flew very nicely and already much, much quieter then with my previous Minifan Pro and Typhoon 2W20 motor. It was also a bit slower, but for this plane that is not so important. I do feel that the restricted thrust tube and maybe also the inlets are holding back this fan. On full throttle I was pulling almost 600 watts on 2500mAh Gens Ace 25C LiPo's. The motor was cool after landing.

The L2855-2800kv should be a better match for that 4S setup.
Capable of 1.4Kg area, then whatever loss the aircraft causes.

Originally Posted by PeterVRC

The L2855-2800kv should be a better match for that 4S setup.
Capable of 1.4Kg area, then whatever loss the aircraft causes.

Thanks Peter for the advise. But would that setup not draw much more Amps? Are there real life numbers for this combo in a restricted flow environment?

Originally Posted by MrBlobby

Thanks Peter for the advise. But would that setup not draw much more Amps? Are there real life numbers for this combo in a restricted flow environment?

Around 60amps.

I have an Extreme RC Alloy with the Typhoon 2w20 just sitting in a Modified 64 mm F-18 airframe I'm getting 655w at 48 amps. I only got about 780g of thrust (on dodgy kitchen scales) . I'm sure the exhaust is restricting it quite a bit I think it will go in a better airframe.

Tam did you forget to put the wing spar in on purpose? Are we getting a little nervous with Sean being able to kick your butt in flying skills?

MrBlobby, yeah have to agree, intake and exhaust on this fan are critical to getting everything out of it. Just look at the differences in running them with/without a fan lip and how it changes the specs, on a test stand.

The more air you can get to the fan the more you get out. And in the same vein, having all that air to the fan won't do diddly if it can't get out.

Didn't stay at a Holiday Inn last night, but I'm beginning to wonder if the bi ducting is causing problems with clean airflow to this fan. Maybe just me, but I see a single straight inlet giving a straight shot of air, where as the bi ducts are having the air come in at multiple angles and if the Y is too close to the fan you are getting all kinds of turbulence in the air before it hits the fan. I don't know, I just see it as two streams of air colliding in front of the fan like two streams of water. Outer portions are fast and smooth, inner are all muddled together, bouncing off one another.

Yeah I know the tips are generating the thrust, but all that jumbled air before them has to have an effect on the fan being able to cut through it.

Well here is my flight footage from yesterday! Everything seemed to be going well! I probably should have used better throttle management because I ended up toasting my motor! After the last high speed pass came the dreaded white smoke!!! Somehow though i was able to glide that heavy f-18 to safety. Bent the landing gear just a little but the plane is more or less in one piece!! It sucks because the plane sounded great!!!

F/A-18 70mm EDF Jet ChangeSun 10 Blade 70mm CyclonePower 2500kv (3 min 53 sec)

Originally Posted by jk671

Well here is my flight footage from yesterday! Everything seemed to be going well! I probably should have used better throttle management because I ended up toasting my motor! After the last high speed pass came the dreaded white smoke!!! Somehow though i was able to glide that heavy f-18 to safety. Bent the landing gear just a little but the plane is more or less in one piece!! It sucks because the plane sounded great!!!


https://www.youtube.com/watch?v=Id4j...e_gdata_player

Shoot, scratch the 2500kv for 6s...

Looks like the 2800kv will have to do for 5s or 3300 for 4s

Jk, Did you fly wot about 90% of the flight. WOW, sounded great. Did it have a greater than 1/1 thrust? Lee

Originally Posted by erh7771

Shoot, scratch the 2500kv for 6s...

Looks like the 2800kv will have to do for 5s or 3300 for 4s

I know! I am searching for a strong 2300kv 6S motor while not having to spend $75 on a e-flite bl32!!! I wish cylonepower had a 2300kv moto that can handle rhis fan on 6S!!! (You hear that cyclonepower/rc lander manufactuers!!! We need a strong 2300kv 6S motor that can handle the load of the changesun fan!! Give it to us! We will be so grateful!!)

Originally Posted by jk671

I know! I am searching for a strong 2300kv 6S motor while not having to spend $75 on a e-flite bl32!!! I wish cylonepower had a 2300kv moto that can handle rhis fan on 6S!!! (You hear that cyclonepower/rc lander manufactuers!!! We need a strong 2300kv 6S motor that can handle the load of the changesun fan!! Give it to us! We will be so grateful!!)

There's the MB2 which is 37usd from rc-castle - http://rc-castle.com/shop/product_in...oducts_id=2143

Has anyone tested this yet?

The CP480 2500 was giving me 5.5lbs of thrust on the bench...I'd still take it if it was 5lbs of thrust.

Didn't the CP480-2800kv do around 4.5lbs?

Regards

Edit: Yesterday I had around 8 flights of my A-4 with the 8blade Go-Eagle fan in it and with the CP480-2500kv motor I'm at 80amps on 6s with the 45c packs and around 85 amps with 65c 6s pack and no thrust tube. Those where in the plane amp numbers

You sure you were only pulling around those amps installed?

Maybe bifurcated ducting ups the amps, seems like the motor is already being pegged...

Thx for any input

Originally Posted by mopetista

The broad flight envelope and good performance is due to the RG-15 airfoil which is still one of the best for slope soaring, and more versatile than the RG-14 which is often used on EDF jets....
The HET motor is for a minifan, no CS70 I would guess (or will you use 2s ;-)

where did you order it for 69 Euros shipped to Canada, that's a very good price...

Well I'm hoping to run it on at least 3S in the CS, and then 4S down the road.

I've got a 100amp ESC on the way.

Has anyone done any testing on the 1W-30 using a CS70?

I'm guessing 1.5KG of thrust would be enough to really get this plane moving. Especially if I keep it light with a 3S setup.

Originally Posted by jk671

I know! I am searching for a strong 2300kv 6S motor while not having to spend $75 on a e-flite bl32!!! I wish cylonepower had a 2300kv moto that can handle rhis fan on 6S!!! (You hear that cyclonepower/rc lander manufactuers!!! We need a strong 2300kv 6S motor that can handle the load of the changesun fan!! Give it to us! We will be so grateful!!)

For CS10 you need 1900 to 2100KV for 6S LiPo!!!

Originally Posted by bamaguy

For CS10 you need 1900 to 2100KV for 6S LiPo!!!

The CP480's outrunner bells are longer and thus produce around 5.5lbs of thrust on the bench at 80 amps but I think that is pegging this motor seeing in place ducting etc up the amps past it's ability to dissipate heat.

5.5lbs is a lot of get gone, really sounded nice in that F18

Originally Posted by erh7771

Shoot, scratch the 2500kv for 6s...

Looks like the 2800kv will have to do for 5s or 3300 for 4s

That's what I gathered from your tests. Just ordered a 2800kv to run on 5S.