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Old Sep 28, 2012, 01:00 AM
Extreme CNC Alloy EDF
Extreme_RC's Avatar
Australia
Joined Mar 2006
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Quote:
Originally Posted by Prof100 View Post
With all the posts on this thread could someone summarize or identify whether the stock CS fan and some HK or other low cost motor work acceptably on a 4S? Or do you have cough up $150 for modified fan and housing with a $125 motor to get it to work. Please advise.
You certainly dont have to cough up your lifes savings! The Extreme Alloy CS10 fan unit is AUD$75.00 complete, motors to suit range from $50-77, not a huge expense, or you can get a fully assembled balanced ready to install fan unit with HET motor to suit 4s or 6s for $170.00.
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Old Sep 29, 2012, 09:59 AM
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juanjulian's Avatar
Guatemala, Guate
Joined Jul 2007
282 Posts
At last recieved my two stock fans.

Was looking for a low watts aplication for my newly build rbc ta 183.

Had in hand only two motors a het 2w that for sure is not for this fan, and a kontronic fun 480-33

After balancing with stock adapter (was not easy) measured the fallowing with trumpet lip:
Battery: haiyin 3s 40c 3300 mah
Freshly charged
Amps:75 (too much but only for a short period as voltage drops)
Watts: 700

This is out of spec for motor but at 3/4 of throtle can manage
Amps 55
Watts 550
This is very similar to the het 2w amp draw and watts,so as voltage drops there is no danger of having the extreme amps.

Think this configuration should work

The sound is better as with wemotec fan, but waiting the results in the air. Lets see if the eficiency penalty is worth. Was pulling 450 max amps with freshly charged same lipo.
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Old Sep 29, 2012, 10:10 AM
Big gov never Works
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Skunk Water, Rhode Island
Joined Jul 2002
12,327 Posts
It has been said, that short can 28mm motors cannot be used for this fan. But, I have to differ. It's all in how much power you intend the little motor to use.
http://www.rcgroups.com/forums/showp...postcount=4776 The best thing with this set=up, is the light weight for the system. Only a 2200 4s pack is needed.

Before I opted for a different fan, in the intended model, I ran (6) pack cycles though it. The motor got reasonably quite warm. But no more than a HET 3W in a minifan on 4s. But with 100+W and about the same amp draw.

Fuzz
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Old Sep 29, 2012, 11:23 AM
EDF rules... :)
AirX's Avatar
Joined Nov 1999
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Quote:
Originally Posted by St. Martin View Post
It has been said, that short can 28mm motors cannot be used for this fan. But, I have to differ. It's all in how much power you intend the little motor to use.<snip>

Fuzz
Yup I said this fan is not for short can motors and this was qualified to higher end of kv range 2800 to 3000 kv. The reason was the load causes the motor to run well outside of its design when motor mass is low.
My current motor is the L2855-2300 on 4s. 97grams and only runs warm. Good for 2.5lb ~650watts.
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Old Oct 01, 2012, 11:49 PM
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Madison, MS
Joined Oct 2006
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Who's running the Turnigy L2855-2300 on 5s installed in an airframe and what thrust, amps, watts are you getting? Are the motors burning up or are they hanging in there?

Thanks,
D
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Old Oct 02, 2012, 12:05 AM
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Australia, VIC, Melbourne
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5S L2855-2300kv..... lasts long term.
900w to 1050W sort of ranges. 52A to 55A ranges.
800W in my Vampire at 43Amps. Due to airflow restriction.

Dynam Meteor 160kph. 1.3Kg thrust in-plane
Dynam twin CS10 Me-262 140kph 2.7/2.8Kg thrust in-plane (mediocore efflux speed but very strong thrust).

They are not a 'high' power combo, just 'good'/above-average combo.
A very nice and cheap 5S solution, to match/beat 4S - for less cost and same weight etc.
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Old Oct 02, 2012, 12:42 AM
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Greece, Attica, Athens
Joined May 2011
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Quote:
Originally Posted by dpowellmeii View Post
Who's running the Turnigy L2855-2300 on 5s installed in an airframe and what thrust, amps, watts are you getting? Are the motors burning up or are they hanging in there?

Thanks,
D
In the EGO panther I get 1.5 Kg thrust and 55amps using 3700may 25c.

In the ME-262, 1.7kg 58amps using nanotech 4400may 65c for both motors.
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Old Oct 02, 2012, 01:15 AM
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Australia, VIC, Melbourne
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Ambiguous:
"In the ME-262, 1.7kg 58amps using nanotech 4400may 65c for both motors."
Just 58Amps for both motors?
One battery powering both motors?

I know the 58A and 1.7Kg is for each motor.... but 1 or 2 batteries used? hehe
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Old Oct 02, 2012, 01:22 AM
Not enough hours in the day
Slaanesh's Avatar
Melbourne
Joined Feb 2009
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Quote:
Originally Posted by dpowellmeii View Post
Who's running the Turnigy L2855-2300 on 5s installed in an airframe and what thrust, amps, watts are you getting? Are the motors burning up or are they hanging in there?
I'm running a L2855-2100 on 5S in a HET ME-163 Komet. Sounds great, though it's not super-duper fast. Can hand launch no worries.

I'm also running a L2855-2300 on 5S in a Hobbyking/ProEDF composite F-16.
It's really disappointing! It weighs 1350g ready to fly but it certainly doesn't produce anywhere near that thrust - I would say more like 1100g or so as doing a vertical test (holding it vertical and letting go) results in it dropping. It flies nicely but is "not-fast"

From memory, I'm getting about 620 - 650W on these.

I haven't checked the battery voltage so maybe that's the issue. I'm using 2200mah 5S nanotech 45C in each.
Or it could be the ducting, especially on the F-16 - the EDF us located right in the middle - probably a good 12 inches from the in-take.
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Old Oct 02, 2012, 01:50 AM
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United States, TX, Grand Prairie
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Quote:
Originally Posted by Slaanesh View Post
I'm running a L2855-2100 on 5S in a HET ME-163 Komet. Sounds great, though it's not super-duper fast. Can hand launch no worries.

I'm also running a L2855-2300 on 5S in a Hobbyking/ProEDF composite F-16.
It's really disappointing! It weighs 1350g ready to fly but it certainly doesn't produce anywhere near that thrust - I would say more like 1100g or so as doing a vertical test (holding it vertical and letting go) results in it dropping. It flies nicely but is "not-fast"

From memory, I'm getting about 620 - 650W on these.

I haven't checked the battery voltage so maybe that's the issue. I'm using 2200mah 5S nanotech 45C in each.
Or it could be the ducting, especially on the F-16 - the EDF us located right in the middle - probably a good 12 inches from the in-take.
yeap check ur volts
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Old Oct 02, 2012, 01:56 AM
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Australia, VIC, Melbourne
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Seeing I use the same exact same combo (motor, fan, esc, battery) across a number of planes, I see the quite notable differences are due to "airflow restriction", whether inlet, exhaust, shapes etc.

To get 1100g thrust you need approx 800W or a bit more.
1100W will give you 1500Kg approx.
That F-16 sounds close to my Meteor, and is even quite similar 'typical jet fighter' form of ducting and slick aerodynamic profile.

I have never tried a Nano for these.
$70+ for a bit more power over a $20 battery? Not worth it... and not required. Mine cover that 800W to 1100W range, for more than adequate speed in each plane.
But if you want SPEEEEEED.... you have to pay for it. (Also in motor life).

(There is now way that F-16 is 600W..... it will be 800 - 900W. It would not even fly at 600... not very well anyway! My guess....... 950W... test it again.).
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Old Oct 02, 2012, 02:20 AM
Guarantee at least one landing
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Australia, QLD, Mooloolaba
Joined Aug 2007
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Quote:
Originally Posted by Prof100 View Post
With all the posts on this thread could someone summarize or identify whether the stock CS fan and some HK or other low cost motor work acceptably on a 4S? Or do you have cough up $150 for modified fan and housing with a $125 motor to get it to work. Please advise.
I'm using this motor in the CS 10 and getting a great result on 4S. Won't break any land speed records, but it's plenty quick for me and the sound is great....It has enough power to hand launch by myself. On a Nano-tech 2650 35C lipo i'm getting just over 700w at 50 amps.
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Old Oct 02, 2012, 03:06 AM
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Just for info to Burdo and others:

You mention 50Amps from a 4S 2650mAH 35C, they cost $30
It weighs 291g
50A x 14.0V (??) = 700W
You will need a 60A ESC or higher.
It would last 3.1minutes at WOT.

If you used a L2855-2300kv on a 5S Zippy 3000mAH 20C battery, which is $20 ($19.80), and weighs 379g, you get 1100W at 55A and would last 3.3mins at WOT. Same ESC needed.
But you also have the option that you could fly at 70% throttle, for the same thrust as the 4S combo, and get over 4mins easily.

So the total combo was $10 less for 5S and you got 45secs more flight time.
The 80g heavier weight is a nothing really, plus foamies are too light anyway, and the huge amount more power will exceed that difference by miles too.
It would be about 900g thrust for the 4S and 1.30Kg for the 5S (on that battery).
For that $10 less......

Nothing compares to that 5S combo, it just slaughters all others for the cost and with 'good' output (equal or better than 4S). Nano Schmano, LOL.... all that matters is the end result - and what it cost
You can't even justify 4S on "I dont need as much power".... as it is CHEAPER to have MORE. Or, throttle limit it to get more flight time anyway. You can even restrict airflow ON PURPOSE, to get a better jet sound, whilst using the less power amount that will cause, and have the lower thrust you only 'needed' if you really wanted to.

There is just no other combo of use at all, for this 1100W and under situation.
Then above it (1100W upwards) you do start to have a FEW options/choices you could make. But even then, that next level is almost only HET (with a narrow window for cyclone power), unless you can get a cheap Turnigy XK (which none are around anymore). So really, the useful effective/cost choices in the CS10 are quite small.
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Old Oct 02, 2012, 03:55 AM
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Greece, Attica, Athens
Joined May 2011
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Originally Posted by PeterVRC View Post

I have never tried a Nano for these.
$70+ for a bit more power over a $20 battery? Not worth it... and not required. Mine cover that 800W to 1100W range, for more than adequate speed in each plane.
But if you want SPEEEEEED.... you have to pay for it....
That's for a twin. I also use cheaper banks as well. I found that others don't hold voltage well resulting in lower rpm and thrust.
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Old Oct 02, 2012, 03:59 AM
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Greece, Attica, Athens
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Quote:
Originally Posted by Burdo View Post
I'm using this motor in the CS 10 and getting a great result on 4S. Won't break any land speed records, but it's plenty quick for me and the sound is great....It has enough power to hand launch by myself. On a Nano-tech 2650 35C lipo i'm getting just over 700w at 50 amps.

+1 on this combo. It's the cheapest effective for airframes up to 1.2kv.
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