Cheaper than a Actro....

[50feet]

If any of you guy know me from other site you know I am the king of finding cheaper stuff and making it work...

So since you guy sparked my interest in this Actro single stage thing I was wonder in if you power guru' s would tell me if these new large Hyperion would stand a chance in an Ion.

http://aircraft-world.com/prod_datasheets/hp/z40/z40all.htm

Im going to run the spec. In the power spread sheet but the im not sure why some motors list the resistanc like 40 ohms and these specs are in decimals.

Im may try it since this is a Pretty $150 motor.

[50feet]

This is the spread sheet using the biggest motors with 320 and 275 kv

http://img293.imageshack.us/img293/4117/kif09421bw.th.jpg (http://img293.imageshack.us/my.php?image=kif09421bw.jpg)

[mudbogger2]

77 amp peak and Sugg. Power Range 900W ~ 1800W. That motor probably ain't gonna cut it. Plus you would be needing a way to mount it.

[50feet]

You can mount it using the plane fire wall mount kit seen in the pic. That pic has a treaded pro adapter but I think you can also reverse the shaft.

As for the spec's. I dont read german but I think the actro site says the 32-x it good for 1000 1400 watts and 50 amps. But again I dont know since its in german.

What are the specs of the Actro?

[fitenfyr]

Well good for you if you want to give it a try, but remember this......

With these big electrics you have a lot of $$$$ riding on that 150.00 motor. :D

I let Chris and some of the other "electronical geneologists" :D do my testing for me. :D

The amount of heat and the internal resistance are big factors with these electic motors.
AXI has a motor that on paper looks great, but didn't hold up to testing when Chris ran one.

The resistance from a propeller is probably 1/2 or more the resistance of a gear train and rotor blade. Reistance makes heat and heat makes motors melt. :D

Do yourself a favor and stick to the ones that have been tested by guys with more $$$ than most of us. :D You will be better off in the end. :D

[50feet]

Thanks for the advise...Im not tring to be negative but that $150 remark stings Hacker is charging you 300 for a motor good for 50 flightsmade for this heli.

Some guys think High price mean quality. Those guys say you cant fly a heli with anything less than $100 servos and 300 dollar gyros and 600 lipos and 100 blades. I have prove that is not true. And while I dont mind letting someone else be the tester I dont mind doing it my self.

I have heard good things about this brand. And those actro are also airplane motors. I have not seen many brushless motor that give helicopter power specs

[MinAirChris]

Hmmm, well a motor with a resistance of 40 ohms would indeed be a slug. I'm guessing that was actually 40 milli ohms which would look like 0.04 ohms in decimal form.

The most critical things to look at when contemplating a new motor are efficiency and whether or not the motor can shed heat. ALL motors will make heat as none are 100% efficient, how much they will make and how well they get rid of it are very, very important. Thermal mass is part of this, always look for a motor in the 12 to 20 ounce range for a heli of this size. Fins and good air flow are also part of this.

I'd suggest a first purchase of the "Electric motor handbook" by Bob Boucher (Astro Flight) for basic math on how to look at motors. It's written towards cobalt motors but the formulas cross over to brushless.

I too have looked at the Hyperion line but have not gotten around to trying one yet. A hint: try a smaller (cheaper) one in a plane first and see how it does there. Usually a manufacturers motors are all kind of the same, if one has a certain trait, so will others in the line.

There are so many motors these days that may work, it's hard to keep up. But usually a good look at the base numbers will go a long way towards accurate prediction of performance without a lot of work and expence.

Chris

[50feet]

I will pick up that book.. Thanks.

In the KS power tool its 89% efficient. I find the tool to be pretty accurate.

Just some thing I was thinking of trying when this motor gives up the ghost.

[fitenfyr]

Chris hit the nail on the head....

Most of the motors out there are just not built to carry the load a helicopter places on them.

Yes the Actro is and airplane motor. It however was a VERY robust airplane motor from the start and actually Actro has now started to produce a heli line.
From what I understand the internals are not much if any different, but it is still a manufacture standing behind a specific type of use.

I am not one to shy away from less expensive products thats for sure.
I have owned my fair share of inexpensive gear. 90% of it though has found it's way out of service for one reason or another....
In this hobby there is usually a reason that the product is priced high and supply/demand is a factor. If it is priced high it is usually really expensive to produce or is in great demand because it works. :D

The margins on these products are not making anybody millionaires...well except maybe a few LiPo manufactures. :D :D :D

I have too much riding on my motors to try something that "may" work right now. I go for what the guys I trust have tested. It maybe more expensive out front, but in the long run it pays off to me.

[WillJames]

I let Chris and some of the other "electronical geneologists" do my testing for me.


Me to. This is exactly what attracted me to the Ion and ChrisS (MA) in the first place. I did not have a lot of $$ to reinvent the wheel with, I wanted a tested and WORKING setup that I did not have to mess/tweak/pour more $$ into/etc with. I have over 120 flights on my Ion/32-3 setup with ZERO problems and the performance is great. PM the machine and go fly. Turnkey setup that works DAMN WELL. So well that I got over confident and bought a couple of TREX's and poured a bunch of $$ into them.......no where near the satisfaction level of the Ion-X..... :arggg: