rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 623 ONLINE 74 EVENTS SEARCH REGISTER  START HERE
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]2199 viewsPOST REPLY
Advantage Hobby . GrandRC . Revolution Models

.
.
e-Lite Machines Corona > Heavy Bird?
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

Hi all,

Just wondering, whats a hopped up brushless corona supposed to weigh?

Mine seems a little overweight, according to the manual. The manual states 44oz. (1250gr.) for a stock one with brushed motor and 7s pack, but mine is doing 49oz. (1490gr.)

My setup:
Motor: Astro 020 - Ribbed corona version.
ESC: Schulze Future 18-46K.
Batt: 7s 2400mAh Sanyo NiCD.
Servos: 2x Robbe FS500, 1x Hitec HS-81MG.
Gyro Futaba GY401
Extras:
- Ultimate BEC.
- Chopper-1 Titanium Tailboom.
- Chopper-1 Tail Gearbox.
- Chopper-1 Tail Fin.
- Chopper-1 Tailboom Mount.
- Carbon horizontal Tailfin.
- JR Landing Skid.
- A bunch of ferrite filter rings.

What do you guys think? To heavy?
05-09-2006 Over year old.
 
 
Misteryez
Heliman
Location: Montgomery NY

The titanium tail boom is your extra weight.
05-09-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

Figures. You think the astro 020 can handle it?
05-09-2006 Over year old.
 
 
satnaam
Senior Heliman
Location: GTA Ontario

Loose the NiCads and go with Lipo's

Titanium boom ( if it is made of Titanium metal) it's wieght less then the aluminum one. Loose the Nicads to save lot of wieght.

satnaam
05-09-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

And exactly how am I supposed to go lipo with a 7~8 cell brushless motor?
05-10-2006 Over year old.
 
 
Misteryez
Heliman
Location: Montgomery NY

Titanium boom ( if it is made of Titanium metal) it's wieght less then the aluminum one. satnaam stated.


This is totaly untrue if the thicknees of the titanium is much thicker then the aluminum boom. The stock aluminum boom is .018 inch thick. The titanium tail boom is about .052. Of course chopper 1 tail is the boom discussed here.

The point being if all dimensions were equal then yes titanium is less then aluminum. But that is not the case here.

Figures. You think the astro 020 can handle it?

I ran a simular setup last season. The only difference was I had a phoenix 35 ESC and 2 Thunder power 3S 2100 mah packs wired together. Ran darn good. About 15 to 20 minutes flights with no problems. I was however dis appointed with the astro 20 heat temps and the phoenix heat temps. So I sold them both. Still have not replaced the motor and esc yet. I am looking for Kontronik motor and ESC.
05-10-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

So the motor ran too hot on 3s lipo? Meh, why is it so hard to find a proper motor...

Did yours have coolingfins CNCed right on the motor can though? Ive heard in the past there where finless corona motors from astro.
05-11-2006 Over year old.
 
 
Misteryez
Heliman
Location: Montgomery NY

It ran too hot for my likeing. I believe alot had to do with the phoenix 35 also. The astro 20 did have the machined cooling fines.

Finding a good quality proper motor is very expensive. Because most every brushless motor is designed and tested in Planes and other RC. Helis is still very small to this brushless tech.
05-11-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

Did you like the motor on 7 or 8 cells? And why did the ESC cause somuch heat?
05-11-2006 Over year old.
 
 
Misteryez
Heliman
Location: Montgomery NY

I always ran on lipos. The ESC heat I believe was related to the BEC circuit being too weak for 6 lipos.

Remember I ran 3S 2100 mah paks. That is a total of 6 lipos.
05-11-2006 Over year old.
 
 
bret4
Heliman
Location: Brookfield, CT

The chopper-1 tail boom is .035 of a inch wall thickness and yes it does weigh more than the stock boom. The weight is no problem but it will cut down on flight time a little. My weight is 56oz with a 8 cell battery pack. What you gain is a more stable heli and one that will never break a tail boom again. The Ti tail booms are no longer sold. Cost too much for the Ti to keep making them.

The astro motor is not that great. I have had good luck with a Hacker C40 12T motor and a Phoenix-45 esc. I run 8 cell battery packs with no problems. Of course I have all the chopper-1 upgrades and some of BT's.

Bret
05-13-2006 Over year old.
HOMEPAGE  
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

You think it would be best to later on simply upgrade to a Hacker C40 12T? Exactly how hot does it run, and in wich conditions? (canopy on? ambient temps?) My astro burns my finger after flying, but spit does not sizzle on it. I tried measuring it on the axle with a multimeter temp diode, and it gave me around 55 to 60'c (130 to 140'F). Ill get a better measuring tool soon, but im scoping out the market for a temp/watt/tacho meter tool.

I wonder though, why doesnt anybody bother with lipos? They weigh somuch less and allow you to lug around almost double the capacity youre used to get from regular NiCD/MH.

Im almost thinking of reverting to stock setup to cut the motor a better weight deal.. Like, stripping off the horizontal fin, and replacing the massive tailgrip with the 2 stock loops. Still wondering where that 5 to 6oz. of extra weight came from though.. Can all my upgrades really add up to that much extra weight?

The weird part is though, Astro-Flight says its especially designed for coronas, and the motor can run 300watts and 35amps without damaging. Even though im just hovering on 155watts 18amps, and the thing still boils up like hell.
05-13-2006 Over year old.
 
 
nrthwing
Heliman
Location: Hebron KY (just south of Cincy)

Astro Motor Very Disappointing

After selling my first Corona with a Hacker motor / Hacker esc setup and then crashing several more expensive helis I purchased a second Corona to regain my confidence and flying skills. As a combo I was told the Astro Flight 020 "specially designed for the Corona" would work great. Bull*$#@!!! After 2 to 3 minutes of hovering or forward flight it gets really hot. The Corona is brand new and I am having trouble getting all the vibrations out of it. Especially since I can't fly it for any length of time.

I running an 8 cell 3600 pack.

Overall I am very disapointed with the whole thing. It's like they say, you can never go back. My first one flew perfect. Ran cool, no wobbles!

Good luck with yours. Check the classifieds later this summer, it may be bargin priced.

Mike
05-22-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

I mailed astroflight about this, and they said its allowed to run around 65'c (150'F).

Im getting my IR temp gun in a couple days, so ill see. If it screws up completely, Ill mail astroflight and demand gratification for my misinformed purchase. Its redicilous when a factory goes around telling theire motor is "purpose built" for something, and then it clearly turns out to be bull. In this case it could mean I blew 80 freaking dollars on a useless motor..

I could sell it to someone still flying brushed with a nice "its built for it" salespitch and just keep my trap shut, but Im not sure Id feel right about that..

Ill just pray the darn thing doesnt hit 65'c or more then... Or else im screwed, because a new motor is so expencive..
05-23-2006 Over year old.
 
 
bret4
Heliman
Location: Brookfield, CT

I wish I could tell you how hot the Hacker motor is. It is not that hot when I fly. In fact it isn't hot enough to have made me check the temp. I have had other motors that have went up to 150F on other helicopters. Never liked that. That is getting close to the point that I would be worried about things coming apart inside the motor due to heat.

I'm not sure about the Astro flight 020's that are made now but the old ones had a lot of problems. Some came apart inside. It's just not known as a good motor for the corona. Don't know how they get away with pushing it as good for it.

A lot of people run lipo batteries on the corona. It just cost more.

Bret
05-23-2006 Over year old.
HOMEPAGE  
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

If I ever get a new motor, I think ill get a hacker one, since that one had the least complaints sofar. Just not sure wich one though, there are tons of type numbers, lengths and what not.

150'F is indeed a tad much, the SM cobalt magnets can deal with 400'F before loosing theire power, but I guess the other stuff melts WAY earlier. If the glue gives, the whole thing starts twirling around. (wich might end in a mauled ESC?)

Just wondering though wich motor do you guys talk about? Ive heard there where 020's WITHOUT built in cooling fins a while ago? Mine has fins:


As said before, ill tempgun the thing, and if its below 150'F, ill just let it huff around like this, and if it busts up, ill just send it to those bastards (yes, I said it..) to see if I can get my money back or something. Wether its straight from astroflight, or from helihobby.com I dont care, they are just selling bullcrap motors that bust up with "specified" usage.

They say the thing can deal with 300watts though, and I measured 160watts in hover. So what the hell is messing up, beats me..
05-23-2006 Over year old.
 
 
bret4
Heliman
Location: Brookfield, CT

I never had a old 020 so I couldn't say if they had fins or not. What rings a bell is that the glue did come loose like you mention and the motor would eat itself up.

The hacker I use with great results is the C40 T12.

Bret
05-23-2006 Over year old.
HOMEPAGE  
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

Ive got a couple 2200 packs laying around, they fit quite nice actually:


Would these be nice on a hacker?
05-23-2006 Over year old.
 
 
iceman3
Heliman
Location: Fredrikstad-Norway

Freakazoid

Your Corona looks nice with the lipos. I can see that you have upgraded your tailboom holder. What is your experience with that? I have wondered to upgrade mine with a better solution than stock as I can feel some vibrations/movement from the frontgear/boom. I have upgraded mine with a Mega 16/15-3 motor and all I can say is that it feels solid with lots of power. When hovering for 5-6 minutes the motor gets only a little hot, but not to hot to hold.
05-23-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

My tail is a Chopper-1 titanium upgrade. Its rock solid, no boomstrike damage, no cracked boom mounts, no tail crown gear lifting off from the main crown gear. Its also got a vibration dampening effect. It does add a couple ounces though.

After hovering my corona for 6 minutes (sanyo 2400 pack runtime..) the motor becomes rather hot, but not sizzling hot. I can hold it for a second or 2. But the temp gun will reveal much more accurate conclusions, so ill wait for that to judge the astro.

IF I need to go to another motor, id much rather prefer one that eats lipo without ANY problems. Simply because its lighter and it gives me oedels more capacity for a decent flight time.

So I wonder, does the hacker thing chew lipo properly?
05-23-2006 Over year old.
 
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]2199 viewsPOST REPLY
CarbonXtreme . Midland Helicopters . Modefo's RC Helicopters

.
.
e-Lite Machines Corona > Heavy Bird?
  UPDATE SCREEN   PRINT TOPIC Advertisers 

Subscribe to This Topic

Saturday, May 17 - 4:55 am - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie