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Home✈️Aircraft🚁HelicopterGasser Model RC HelicoptersOther › New Wally Cooling Fan Installed today along with the remote Kill switch
04-27-2009 01:37 AM  10 years ago
Dr. Fibinotchi

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Sioux Falls SD

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true test
I am not lying when I felt the engine smoothed out some from the weight diffrence, but because when I fly I was doing full throttle curcles on the deck I can see a diffrence and could prove it temp wise with numbers. This is the same as mentioned above with heat. If we fly in slow forward flight you are not going to see any results. Try load her up with rpm and heat and a load and take before and after samples. You will see the diffrence and can prove it. This is the tests that will prove something.

-Cody
If you want others to be happy, practice compassion. If you want to be happy, practice compassion.
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04-27-2009 02:24 AM  10 years ago
windy62

rrApprentice

USA

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So, what you're saying is that this fan shows an improvement when you are DRASTICALLY abusing the engine, at high RPM's or HIGH temps, or high loadings?

Otherwise the stock fan is just fine?
If we fly in slow forward flight you are not going to see any results.
windy62
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04-27-2009 03:04 AM  10 years ago
Carey Shurley

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Orlando, FL - USA

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I saw temperature differences at hover. Course its Florida and very hot and humid here.
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04-27-2009 03:36 AM  10 years ago
C.A.P.

rrApprentice

custer park IL.

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Yes you see a temp change at all flying speeds. More so with the outside temp going higher and higher , ONLY if you have been taking temp reading before you put the fan on, In Raja case, he never used a temp gun so he is just assuming the temp has been changed, because how could he realy know, He said 210deg was the hottest spot on the engine, Was that good. I said it's great if that's the hottest temp he could find on the hole engine. So you people who have been using a gun can tell him. If it is a good temp, People who buy the fan ask, What deference will be seen. I ask, Have you flown a gasser before , if they no, I say NONE, How could anyone If they never knew what the temp was before. As for performance, Raja will see no change when the outside temp get hotter because the fan will still keep the engine temp at about 210degs, the best time to put on the fan Is when it's hot outside and after first doing a temp, Then install, then do another temp after, without touching anything, There should be a 40deg drop, after retuning it. It can go lower, I tune my engine with a temp gun. The cooler the engine runs the better it will perform, Wally
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04-27-2009 03:47 AM  10 years ago
rccarguy

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Boston MA

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I'm flying in the same general area as Raja and with a stock fan setup I get readings of 245 to 255 degrees F at the top of the cylinder head with the end of the temp gauge aimed up under the edge of the shroud. Moving down to about the middle of the cylinder I see readings of 210 - 220, and on the side of the crankcase about 120.

Once I get the new fan setup and installed I'll take the same readings for comparison. Wally is saying it will be a few weeks due to the problems with the CNC machinery, so I won't have anything for comparison until late May it looks like.
XCell Spectra G
Radikal G20
Some obsolete nitro helis too...
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04-27-2009 04:58 AM  10 years ago
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I get readings of 245 to 255 degrees F at the top of the cylinder head
rccarguy: For your comparison test, will you be able to use the exact same temp gun before and after the installation of the Wally fan? I ask this because the absolute number (e.g. 255 degrees F) is irrelevant since temp guns can be calibrated differently or have different emmisivity value settings.

I would like to see a good, scientific comparison of the stock fan with the Wally fan so that we have concrete evidence to evaluate and are not just basing our arguments on speculation.

I know, however, that Wally and an engineering friend used a computer jet turbine modeling program to design this fan. Therefore, even if we do not have demonstrable empirical evidence of the improved efficiency of the Wally fan, we can probably assume it is better than stock.
Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives
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04-27-2009 05:14 AM  10 years ago
rbort

rrProfessor

Franklin, MA - USA

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I'm remembering MHA last year
Hot as Hell and a fellow flyer said to me "I never sweat so much in my life!" I was actually afraid I would faint and crash my helicopter due to loss of pilot... Wayne was driving around with water bottles making sure everyone was well hydrated.

I'd bet that will be a good day for the fan to shine. If I remember right, the 1005 was running better than the Spectra that weekend last year. The Spectra engine was "racing" more during maneuvers. With the cooler fan, the racing seems to diminish.

To answer your questions, for my flying and flying style so to speak, I cannot tell any difference in the way the motor runs with the fan, vibration wise. It flew yesterday with the new fan like it flew the day before without. Temps were in the 70's so the stock fan wasn't "challenged". But nevertheless, its always good to have a better fan on the motor so I'm quite happy to finally have it installed before the summer heat gets here. In fact they are talking 90's on Tuesday, but just for a day.

From what other people said, its quite possible my temps were in the mid 200's before with the stock fan, but, its retired now and I'm not tearing the machine back apart to try it unless Wally's fan throws a blade but sorry to say that is highly unlikely!

-=>Raja.
MA 1005 Hanson 280, 4264 flts
Spectra 27 3DMax, 3392 flts
Whiplash V1-2 Hanson 300, 1808 flts
Whiplash V2 Hanson 300, 705 flts
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04-27-2009 05:38 AM  10 years ago
Billme

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MS

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No speculation from me...I'll stand behind everything I said about the fan...
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04-27-2009 05:51 AM  10 years ago
C.A.P.

rrApprentice

custer park IL.

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So everyone knows Raja and I were on the phone through almost an hour or so while he was putting his fan on, because the shroud did not fit perfect, I offer to replace it but he said no. So we walked through it until it was right, Before Raja made his post he was kind enough to ask if I wanted to read it. I said no I think that it would not be right, He has the right to say what he belives to be correct, and I have the same, right. Raja makes one of the best thing ever made for heli's the Jewel, And he is a tuff nut to crack, when it comes to change, So it pleases me that he likes what he has got from me, (but get a heat gun). And before it get to thick here, I DO NOT WEAR A SHIRT, Wally
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04-27-2009 06:00 AM  10 years ago
rbort

rrProfessor

Franklin, MA - USA

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You made me laugh Wally, good "last post" to read before going to bed.
And...
And before it get to thick here, I DO NOT WEAR A SHIRT
What does that mean really? You fly bareback in the sun or what?

-=>Raja.
MA 1005 Hanson 280, 4264 flts
Spectra 27 3DMax, 3392 flts
Whiplash V1-2 Hanson 300, 1808 flts
Whiplash V2 Hanson 300, 705 flts
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04-27-2009 06:00 AM  10 years ago
TaleGunner

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Deer Park WA

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Even though everyone said I didn't need to balance my fan. I figured what the heck its off and my balancer is out so I threw it my hi-point.
It is perfect as you could ever get with my hi-point.

as for weight my stock spectra unit weighed 77grams the wally fan was 45grams heavier.

My shroud did need a little heat but fits very well.
CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2
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04-27-2009 06:12 AM  10 years ago
rbort

rrProfessor

Franklin, MA - USA

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Weight
Another thing I didn't think to do...weigh both fans. But I did just go down now and weighed the original Spectra-g fan with the rubber dampeners in it, 2.8oz or 79 grams.

I did remember to check the balance of the fan when I received it on my highpoint and I did find it slightly off. I called Wally about it months ago and he said to install it as is as its balanced at speed and not static. So I left if be and just put it in. My Minair fan was luckily right on. I say luckily because I've worked with several Minair models building them for autonomous flight for other people and I've had some that are right on, some somewhat off and the worst as bad as 6 dimples drilled on the heavy side to balance it. If I was to drill Wally's fan to balance it, I would have guessed it would have taken 1 dimple at most 2, as it was slightly off by my judgement with the high point balancer.

OK, love to stay and chat, but its crazy late and I gotta go to bed!

-=>Raja.
MA 1005 Hanson 280, 4264 flts
Spectra 27 3DMax, 3392 flts
Whiplash V1-2 Hanson 300, 1808 flts
Whiplash V2 Hanson 300, 705 flts
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04-27-2009 12:15 PM  10 years ago
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Can people who have the Wally fan/shroud installed on their Spectra please post a photo? I am especially interested in the comments Raja made about the shroud not fitting well with the Zimmerman muffler.Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives
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04-27-2009 01:01 PM  10 years ago
rccarguy

rrVeteran

Boston MA

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For your comparison test, will you be able to use the exact same temp gun before and after the installation of the Wally fan?
Yes, I will be using the same guage, I always check temps several times during the day while I'm at the field. If the running temps change after the fan is installed I'll know after the first flight.
XCell Spectra G
Radikal G20
Some obsolete nitro helis too...
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04-27-2009 01:19 PM  10 years ago
ddavison

rrVeteran

Brownsville, Pennsylvania

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I am also waiting on one of the fans to arrive. He was waiting on the redirects maybe now it is the new run of fans ? Trying to get everything up for the season. DaveDaveDavison,GasGob,WhiplashGas,Spectra,JRXG11MV,12X
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04-27-2009 02:55 PM  10 years ago
Dr. Fibinotchi

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Sioux Falls SD

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windy62
Hi windy62

I am not abusing the engine and do not abuse engines. I am only stating that to see a diffrence the most diffrence would be when loaded heavy and or hot outside. There are so many that just figure eight fly a gasser. That style of flying was not pointed at Raja at all. My point was that no one who does that style of flying especially in cooler weather would ever see a diffrence as pointed out above.

Sort of the same for in the electric world when many put a heat sink on the Jazz 55 speed control.

-C
If you want others to be happy, practice compassion. If you want to be happy, practice compassion.
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04-27-2009 03:19 PM  10 years ago
rbort

rrProfessor

Franklin, MA - USA

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Hey no offense taken at all Cody!
I'm just happy to know that in hot weather this fan is going to be better than my stock fan, and that's all that counts! Its the same idea as buying a balanced motor for your heli. Sure you can fly a stock motor, but a balanced motor will give your machine more miles as its gets less vibration wear and tear.

I really have to say that fan is a "work of ART!". Its absolutely pristine machining and looks awesome. I'm sure it takes alot of time to make it, and the final product is well worth it!

Jock, don't worry about the fan shroud covering the exhaust port, its not a big deal. You just put the muffler header over the shroud, mark it with a magic marker around the contour of the header, and then take the shroud off and dremel a nice moon shaped curve. When you put the shroud back on and install the muffler, it will be a nice cut just as you would with a cowl of an airplane around the engine.

-=>Raja.
MA 1005 Hanson 280, 4264 flts
Spectra 27 3DMax, 3392 flts
Whiplash V1-2 Hanson 300, 1808 flts
Whiplash V2 Hanson 300, 705 flts
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04-27-2009 03:20 PM  10 years ago
TaleGunner

rrElite Veteran

Deer Park WA

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Dr. Fibinotchi 2 quotes from the same post
I am not lying when I felt the engine smoothed out some from the weight diffrence,
If we fly in slow forward flight you are not going to see any results.
so if you say it is smoother and cooler why would we not see any results from slow forward flight?

might not be too much cooler but smoother is better with any flying style is it not
CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2
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04-27-2009 04:05 PM  10 years ago
Dr. Fibinotchi

rrKey Veteran

Sioux Falls SD

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temp wise
I was refering about the temp on the slow ff issue. I should not have included the comment on the smoothness mixed in. Sorry for the confusion. We all want a smoother running engine of course and this would help. The comment on temp alone was what I was referring to.

I agree with Raja the quality of the fan is amazing. Now that most of the country is thawing from the winter we can actually fly and have fun again.

-Cody
If you want others to be happy, practice compassion. If you want to be happy, practice compassion.
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04-27-2009 04:36 PM  10 years ago
TaleGunner

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Deer Park WA

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I was just ball busting you leave so few openings.

I have to agree on quality, I'm installing mine now.
CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2
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Home✈️Aircraft🚁HelicopterGasser Model RC HelicoptersOther › New Wally Cooling Fan Installed today along with the remote Kill switch
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