RunRyder RC
 12  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1627 views
Scorpion Power Scorpion Power
HelicopterGasser Model RC HelicoptersOther › Spectra_G with Electric Cooling System
03-20-2009 11:41 AM  8 years agoPost 1
Andrei_S

rrNovice

Moscow, Russian​Federation

My Posts: All  Forum  Topic

not full tested yet.
without blades with full throttle temperature was 110-120C.

PM  EMAIL  Attn:RR  Quote
03-20-2009 12:05 PM  8 years agoPost 2
shawmcky

rrElite Veteran

Isle of Wight,United​Kingdom

My Posts: All  Forum  Topic

Electric fan

Nice to see some innovation,keep up the good work.Be nice to see how the temps compare to a mechanical fan.How are you powering the fan(Lipo) and what is the battery energy consumption.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-20-2009 12:39 PM  8 years agoPost 3
Andrei_S

rrNovice

Moscow, Russian​Federation

My Posts: All  Forum  Topic

Yes Lipo.
7min. work - 400maH.

PM  EMAIL  Attn:RR  Quote
03-20-2009 01:14 PM  8 years agoPost 4
shawmcky

rrElite Veteran

Isle of Wight,United​Kingdom

My Posts: All  Forum  Topic

Cooling fan

Be nice to have the fan controlled by a thermo-switch so it only comes on when needed.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-20-2009 01:28 PM  8 years agoPost 5
Andrei_S

rrNovice

Moscow, Russian​Federation

My Posts: All  Forum  Topic

Yes you are right, but i don't know where i can found this thermo-switch.

PM  EMAIL  Attn:RR  Quote
03-20-2009 01:56 PM  8 years agoPost 6
shawmcky

rrElite Veteran

Isle of Wight,United​Kingdom

My Posts: All  Forum  Topic

Switch

It would need to be small enough to fit between the cylinder head fins,im sure there must be a switch that would be perfect for this job (adjustable for temp range)I am not sure where to look,need someone who would have experience with this type of thermo switch.Heating engineer maybe?

PM  EMAIL  GALLERY  Attn:RR  Quote
03-20-2009 03:07 PM  8 years agoPost 7
kogibankole

rrKey Veteran

albuquerque/ibadan

My Posts: All  Forum  Topic

There are people using the jewel generator to charge buffer batteries. Powering a brushless fan might be a better option than having an extra onboard battery.

But then I cant imagine that a little fan powered by a BL motor will be more effective than the fan and shroud configuration

if im not blade bogging youll find me pack puffing

PM  EMAIL  GALLERY  Attn:RR  Quote
03-20-2009 03:17 PM  8 years agoPost 8
GyroFreak

rrProfessor

Orlando Florida​...28N 81W

My Posts: All  Forum  Topic

From the pictures that electric fan is your primary cooling for the Zenoha so failure of the fan motor, wire break or other will cause the engine to immediately overheat and destroy itself. You need a thermostat to kill the engine if it goes over 120C.
There is a surplus place near me that has various thermostats (miniature) and I will look to see if any available to fit your application.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

PM  EMAIL  GALLERY  Attn:RR  Quote
03-20-2009 03:34 PM  8 years agoPost 9
rbort

rrProfessor

Franklin, MA - USA

My Posts: All  Forum  Topic

Well said

You need a thermostat to kill the engine if it goes over 120C.
Exactly what I was thinking. Should the fan ever fail, you'll need to use that switch that is controlling the fan to short out the black wire to ground and kill the engine before its toast.

Trouble is, you may be low inverted and the engine may die abruptly due to a cooling fan failure (whether intentional or not) and cause more heli damage than its worth.

Its a really cool idea, but sometimes I think a mechanical fan is just the simple way to do things and may be the best choice.

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-20-2009 05:11 PM  8 years agoPost 10
TaleGunner

rrElite Veteran

Deer Park WA

My Posts: All  Forum  Topic

Although I applaud the effort and ingenuity, Why would you choose to do this? it doesn't seem like it would be more efficient than the mechanical fan and any increase in power is reversed by extra battery weight? also the failure of any part of this system would result in a burnt motor.

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-20-2009 07:04 PM  8 years agoPost 11
kogibankole

rrKey Veteran

albuquerque/ibadan

My Posts: All  Forum  Topic

plus the little electric fan simply doesnt have the power to force air like an engine fans for example wallys fan spinning at 12k will outperform any electric

if im not blade bogging youll find me pack puffing

PM  EMAIL  GALLERY  Attn:RR  Quote
03-20-2009 09:47 PM  8 years agoPost 12
shawmcky

rrElite Veteran

Isle of Wight,United​Kingdom

My Posts: All  Forum  Topic

T rex 700 with electric fan

Check out the new post,another guy using an electric,ducted on this one.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-20-2009 11:50 PM  8 years agoPost 13
rbort

rrProfessor

Franklin, MA - USA

My Posts: All  Forum  Topic

If we're gonna get fancy

Why dont you put a radiator up front and use a B&B smoke pump that works on crankcase pressure to move the antifreeze! Zenoahs have a water cooled head as an option so it will make hookup to the motor easy. You can show your buddies the little black neoprene hoses with mini clamps and impress the crap out of them.

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-21-2009 08:10 AM  8 years agoPost 14
shawmcky

rrElite Veteran

Isle of Wight,United​Kingdom

My Posts: All  Forum  Topic

Water cooling

Sorry Raja ,didnt mean to touch a nerve,just like new ideas.thats all..Innovation,innovation.innovation,its not a swear word.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-21-2009 11:16 AM  8 years agoPost 15
Markus

rrApprentice

Montreal

My Posts: All  Forum  Topic

Watercooled Zenoah, as seen at XXL Helicopters Germany nothing can be invented anymore Raja... right..LOL

PM  EMAIL  GALLERY  Attn:RR  Quote
03-21-2009 04:14 PM  8 years agoPost 16
Stall_Warning

rrApprentice

NE, Pa. - USA

My Posts: All  Forum  Topic

I like your home made fan idea.

Was considering the Odin 90 fan. They are cooling a 90
engine on a 2 cell Lipo drawing 3.5 amps. It can run on
3 cells but I don't know it's amp draw.

I like that the fan can continue to cool when the engine
is shut down.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2009 04:10 AM  8 years agoPost 17
Justin Stuart (RIP)

rrMaster

Plano, Texas

My Posts: All  Forum  Topic

This is a neat idea, and I especially like the thought of using a water cooled PUM head and a little radiator, but really what is the benefit here? I am not aware of any full-scale water-cooled airplanes or helicopters on the market (now or in the past) that use water cooling. I know that Harley-Davidson went with a water-cooled engine for their new line of motorcycles a couple of years ago, and that Porsche converted their 911 line over to water-cooled in the mid 1990's, but these do not fly. I thought that Wally's new fan was the be-all-end-all of simplicity and efficiency?

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2009 08:22 AM  8 years agoPost 18
shawmcky

rrElite Veteran

Isle of Wight,United​Kingdom

My Posts: All  Forum  Topic

Electric fan

I dont think that anyone doubts the efficiency of Wallys new fan at all,it has excellent reports.I think this post is just about new ideas,like flybarless heads,heli stabilizers,all things that are not really needed but people like new ideas,a change from the norm,keeps the hobby interesting,for me at least.I dont use flybarless,but i like the concept.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2009 11:57 AM  8 years agoPost 19
Pinecone

rrKey Veteran

Maryalnd

My Posts: All  Forum  Topic

NOt water cooling full scale these days, but think back to the P-51, P-40, P-38, Mosquito, ME-109, etc.

Water cooling allows closer tolerances in the engine due to the more stable operating temperature. This allows more power for the same displcament, although overall engine system wieght may be higher.

P-51 made some 1490 HP out of a 1650 cubic inch water cooled engine. The F8F Bearcat made 2000 HP out of 2800 cubic inches with an air cooled engine. So almost double teh displcament, but only about 33% more HP.

As for an electric cooling fan, if you pick the right fan, they can move the air needed. But you can't just pull a fan off the shelf and think that it will work well YOu have to check th e air volume moved, and the ability of the fan to deal with static pressure.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

PM  EMAIL  Attn:RR  Quote
03-22-2009 03:32 PM  8 years agoPost 20
Justin Stuart (RIP)

rrMaster

Plano, Texas

My Posts: All  Forum  Topic

No water cooling full scale these days, but think back to the P-51, P-40, P-38, Mosquito, ME-109, etc.
Yes, of course. Who could forget about the P-51 (with that big scoop)? I agree that water cooling is better than air cooling for it definitely allows finer engine heat management, and also allows the engine to be fully cowled which, like on the P-51, is both asthetically and aerodynamically pleasing. But were any of these planes you mentioned using electrical radiator fans or were they using belt driven fans?

If you use a Jewel generator to provide sufficient current to power all of the peripherals on a heli, then an electrical fan makes a lot of sense, but if you have to carry around an extra set of batteries then the electrical fan seems to not to be of much benefit.

You could use a PUM head and a redesigned shroud that used a shaft driven Wally fan to direct air over a miniature radiator mounted midship, but since it would probably be best to place the radiator on the lower front of the aircraft to take advantage of any air flow in FFF, it is my opinion that a large Jewel generator with a electrically driven fan to cool a thermostatically controlled radiator would be best.

Hey, do the full sized turbine helis have any sort of cooling (other than lots of air flowing through them)? Those engines are very tightly cowled with no fins that I am aware of.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1627 views
Scorpion Power Scorpion Power
HelicopterGasser Model RC HelicoptersOther › Spectra_G with Electric Cooling System
 Print TOPIC  Make Suggestion 

 12  Topic Subscribe

Tuesday, November 21 - 3:42 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online