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heliaddict2424
05-30-2011, 07:18 PM
It seems to help allot my Scorpion HK-4530-540KV (Limited Edition) comes down allot cooler. I did not have my heat gun with me when I do I will post the temps. Looks messy with all the eagle tree crap on it but I dont fly with it on all the time.

im4711
05-30-2011, 08:47 PM
looks interesting indeed. However I see a lot of batteries. What setup do you use for your TDR? If I am not mistaken I see 2 receiver packs.

ZuvieleTeile
05-30-2011, 09:21 PM
It seems to help allot my Scorpion HK-4530-540KV (Limited Edition) comes down allot cooler. I did not have my heat gun with me when I do I will post the temps. Looks messy with all the eagle tree crap on it but I dont fly with it on all the time.

Geez, you could almost hover with this thing! :)

helicraze
05-30-2011, 09:35 PM
LOL, lots of wires to get tangled up!

heliaddict2424
05-30-2011, 10:05 PM
YaYa I knew I would catch hell for the wires:face. I dont fly it like that only if I am logging speed. Here is what it looks like normally and I run one 3s pack for the fans and it last a long long time..:peace

helicraze
05-30-2011, 10:25 PM
Collecting jives are we???

heliaddict2424
05-30-2011, 10:33 PM
Collecting jives are we???


Yes I have two 80hv's and an 80lv I plan on hooking them together to handles 14s for my XXtreme when I get it...think it will work???:rotf..

im4711
05-31-2011, 03:48 AM
Yes I have two 80hv's and an 80lv I plan on hooking them together to handles 14s for my XXtreme when I get it...think it will work???:rotf..

Disappointed -> only 14S and not right up to 20S setup running them in series ???? :wow2::rotf

Heli G
05-31-2011, 06:46 AM
Sorry and with all due respect, I just canít get past that wiring nightmare. It would worry me all the time while flying... :wow2:
Personally, I believe that a properly constructed Naca Duct is the way to keep the crocos cool. To date the temp readings has been under 70, but that was measured with an ambient of 20 and under. Not sure what will happen when we get to 30+ and running at 2000+ RPM...sizzling bacon perhaps...:bacon

ZuvieleTeile
05-31-2011, 10:06 AM
+++++1 Heli G

If Mick will not come up with a final solution, I'll start something. :roll:
It is my belief, that a NACA duct is the way to go.
Very effective, proven over some 30 years and no additional electric/electronics.

jointer
05-31-2011, 10:35 AM
+1
I will get angry one day and just cut a hole somewhere... :)

ZuvieleTeile
05-31-2011, 11:18 AM
+1
I will get angry one day and just cut a hole somewhere... :)

If you get really angry Jointer, then just cut the nose off by an inch (2.5cm)
That's the easiest way to do it. No mess, nothing to glue, just a quick circumcision with a Dremel blade and plenty of air is coming in.:lol:

jointer
05-31-2011, 11:45 AM
Yeah, i was seriously thinking about that, really!
But it would look really strange on the yellow canopy, but i have black pilot window...

The thing is i do not need fancy canopy for regular flying, but i also do not want to fly without it in hot summer.
The FFF would not be probably possible without canopy (must try it).
Naca...
Cut somewhere, bend the laminate inside (will break probably)... or... do not know. :thinking

Edit: i will definetly not be sticking fans everywhere inside and LiPo or another BEC for them...

heliaddict2424
05-31-2011, 03:27 PM
Sorry and with all due respect, I just canít get past that wiring nightmare. It would worry me all the time while flying... :wow2:
Personally, I believe that a properly constructed Naca Duct is the way to keep the crocos cool. To date the temp readings has been under 70, but that was measured with an ambient of 20 and under. Not sure what will happen when we get to 30+ and running at 2000+ RPM...sizzling bacon perhaps...:bacon

I really don't worry about the wires its just 2 sets of wires from each fan and people already running an ESC fan its just one more set of wires no big deal. The first photos are with the Eagle Tree crap on I only use that when logging speed. I think the duct is a great idea and pretty easy but this solution seems to work great I do full 3d with this setup no problem. I am going to cut a small hole above the motor fan to let the heat out better but will do it in a clean manner. As far as the duct goes does anyone have a concept I own a CNC machine shop maybe I can help..

jointer
05-31-2011, 03:47 PM
What is the purpose of the fan above motor?
I would understand it if there was no heatsink, but why you have the heatsink there?
Is the frame for it mounted only on one screw per side?
I would be affraid if it stay in right position.

Also, the fans blow the air OUT, right, not ON the motor and ESC?
It is more effective like this?

No matter how much i consider it insane, i would like to know how this insanity is working. :)

helicraze
05-31-2011, 04:36 PM
Here is my 2 cents:

I cut the hole in the lower part of the canopy as Jan suggest, did not really do much for temps but i could tell it slows it down.

I put a fan on the esc to blow (via jive BEC) it was noisy and again did not make much difference.

The motor when it stops the outside temp rises, when its spinning its cooling and like all good motors even though its hot its normal and designed for this. The only issue is when ambient is hot the main gear and motor get hotter. If its humid it makes it worse also. I like flying in 15-20degC weather (like it is now in au) temps are really good nothing too hot, in summer when it gets really hot i don't like flying as everything runs quite hot inc the lipos.

heliaddict2424
05-31-2011, 05:53 PM
What is the purpose of the fan above motor?
I would understand it if there was no heatsink, but why you have the heatsink there?
Is the frame for it mounted only on one screw per side?
I would be affraid if it stay in right position.

Also, the fans blow the air OUT, right, not ON the motor and ESC?
It is more effective like this?

No matter how much i consider it insane, i would like to know how this insanity is working. :)

The purpose of the fan is to pull the heat from the motor just as the fan on the ESC does. I am no expert but I can say that certain 800 class heli that has not hit the market yet and will be in XFC is running fans lots of them motor and ESC. It does help there is allot of heat to get rid of and any little bit helps to prevent over temps shutdowns and better efficiency. I have seen the results of running with and with out fans and its been proven to help keep from overheating period. The bracket if very very secure there's no way the fan can touch the motor outside of a crash and yes the fans blow OUT>>>

ElectricSheep
05-31-2011, 06:54 PM
As far as the duct goes does anyone have a concept I own a CNC machine shop maybe I can help..

aussiemick? :)

aussiemick
05-31-2011, 09:25 PM
I have the Duct mould drawn, I have sent to it to a contact that has access to a CNC machine.

But....... IF you are volunteering then PM your EMail address and I will send the DXF DWG and STP file to you.

There is no one keener than I am to get the ball rolling on the Duct.

Mick

heliaddict2424
05-31-2011, 09:44 PM
I have the Duct mould drawn, I have sent to it to a contact that has access to a CNC machine.

But....... IF you are volunteering then PM your EMail address and I will send the DXF DWG and STP file to you.

There is no one keener than I am to get the ball rolling on the Duct.

Mick

Pm sent...

aussiemick
05-31-2011, 09:48 PM
File sent!

Thanks for the offer to help out!!

Mick

aussiemick
05-31-2011, 10:01 PM
Just in case anybody wants to know what the mould/duct will look like

http://www.helifreak.com/picture.php?albumid=1876&pictureid=56652

Mick

shaman3
06-01-2011, 01:50 AM
Mick, that really looks good :)
What are the dimensions of your design? Am I right with my assumption that the last section, where the shape is designed more straight won't be cut out from the canopy, so that the opening is sort of encased?

aussiemick
06-01-2011, 01:56 AM
The duct will be about 40mm long x 15mm wide and 9mm deep.

The cut out in the canopy will be the same size and shape as the duct.
But how you cut your canopy to pieces is your business. If you cut the hole short it would be easy enough to enlarge the hole later if you felt it necessary.

The rest of it is for glueing to the inside of the canopy.

Mick

shaman3
06-01-2011, 03:55 AM
On my "adverse weather canopy", I have recently experimented with a pair of "Dubro Lazer Pushrod Exits". Removed the inner base and glued them to the canopy from the inside. Looks pretty neat (painted black of course, matching the window color).

http://pics.towerhobbies.com/image/d/dubq1419.jpg

I have no definite results yet, but the Jive heat sink seemed to stay noticable cooler.

Its good that your design will feature much larger openings, as that will certainly improve the effect.
IMHO, the most difficult decision is to chose the proper "angle of attack" for the ducts.
If you align the openings for FFF, it looks a little bit odd.
But if you align horizontally, I'm afraid that air intake will be limited...
What do you reckon?

Regards, Daniel