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Century Helicopter . MTA Hobbies . Model Rectifier Corp

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e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Did you fly today?
 
 
shizack
Veteran
Location: Augusta, GA USA

What's the AUW of the Beam? The way it just sits there sometimes is impressive. The Trex's AUW is 754g, and it wants to GO, GO, GO! Sometimes it's a bit much to handle.

I'll bet the Beam would be a wonderful platform to go scale on. I'll bet it wouldn't take much to make it a screaming 3D monster, either.

Pumping your fist and yelling, "COME ON!!!" does not increase battery charge rate.
07-06-2008 07:27 AM
HOMEPAGE  
 
 
Griffin
Senior Heliman
Location: On your Screen

I'm @ 728G AUW with my Airthunder 2200 pack onboard. This is on my wifes crappy plastic food scale, but it's pretty close. I'm very happy so far, it feels like a big brother to the king. My setup is rather tame at the moment, when I get used to it I may change the power plant. Right now I'm running the align 430L 3550kv Motor on a 13T pinion, Align 35amp ESC, Hitec HS65s on the swash, and the Hitec HG5000/5083MG on the tail.
07-06-2008 07:57 AM
 
 
TJinGuy
Elite Veteran
Location: Socorro, NM - USA

Grif: A 15T pinion? What is the tooth count on the main gear?

Greg: I wouldn't say I had a club close, as it was a 2.5 hour drive over there but there yes there is a heli club somewhere kinda near me

- Chris

Variety+spice+life+supporting_paper_towel_industry=
King2+Rex450+Protos+Concept30
07-06-2008 08:22 AM
 
 
Griffin
Senior Heliman
Location: On your Screen

150T Maingear
Edit:
That was a typo my Pinion is a 13T
07-06-2008 08:30 AM
 
 
TJinGuy
Elite Veteran
Location: Socorro, NM - USA

Man that is some serious head speed then

- Chris

Variety+spice+life+supporting_paper_towel_industry=
King2+Rex450+Protos+Concept30
07-06-2008 08:31 AM
 
 
Griffin
Senior Heliman
Location: On your Screen

Using the readyheli headspead calculator, I'm coming up with around 2903 with a 85% Drag Co-Efficient.
07-06-2008 08:58 AM
 
 
shizack
Veteran
Location: Augusta, GA USA

ReadyHeli may say 2903, but my (cheapo, but effective) Globee Intellitach told me I was running 2880 at 90% throttle/0º pitch with the 430L/11T and TP 2200 V2.

I backed down the throttle curve to have 82% at mid stick. It now tachs at 2760 at mid stick/0º pitch.

I'd guess you're really spinning somewhere in the neighborhood of 3100 or more. That would explain the stability...

Pumping your fist and yelling, "COME ON!!!" does not increase battery charge rate.
07-06-2008 10:09 AM
HOMEPAGE  
 
 
TJinGuy
Elite Veteran
Location: Socorro, NM - USA

The Mini ships with a 13T and 15T, the 13T is for 3s batteries and the 15T is for 2s. I understand that the 13T is about 3000rpm on the stock 3500 motor. I can tell you this ... the 13T is a screamer and is just too hot for me right now. Plus it hammers my batteries. That said the 15T should put it in the low 3000s if the 430L can spin it that fast. Just seems fast to me.

- Chris

Variety+spice+life+supporting_paper_towel_industry=
King2+Rex450+Protos+Concept30
07-06-2008 02:20 PM
 
 
Burlyman38
Veteran
Location: Troy,IL

Thats it! I need to hit the hobby store and get a tach.

TJin, i put on the stock motor with the 13t pinion and in normal mode it is was too tame, but in idle up its better, but still not as hot as the king. The king has a 3800 with a 10t which is supposed to be around2300 rpm in idle up. The mini with the 3500 and 13t just doesnt feel that way.

Sooo, its time to get a tack and an IR thermometer to start logging some more info. Especially since the mini heats up my batts and motor more than I like. At least until I get the fan and align blades on it.

JMO.

TripleB

TripleB
Flying by the street light.
07-06-2008 03:40 PM
 
 
toolman18
Key Veteran
Location: Portland, Texas

A bec really cooled my esc down, The fan will cool down the motor. The blades will help both.

We need video proof around here.
07-06-2008 07:14 PM
 
 
tryan02
rrProfessor
Location: Canton, Missouri

Man those mini's must be slow! My REX on 11T is much faster than my king with 3800 and 10t with a 1500mah pack. I cant push the cyclic forward in the front yard cause the rex will takeoff not so on the King.

Now that I threw out the TRIX is better than mini rant. I think you just need to look at your setup triple B. I got 12 degree deflection on my cyclic and the EPA CH4 set to 140 on my gy240 for a faster piro rate with no expo or dual rate. And midstick on these heavier machines seems that most are running 70% throttle at midstick.

Either that or your just still being mesmerized that the bigger bird seems slower.

Canton MO backyard flying club
Club President
Team No funds left.
07-06-2008 08:00 PM
HOMEPAGE  
 
 
TJinGuy
Elite Veteran
Location: Socorro, NM - USA

Well the bigger birds do react slower than the king but then again they weigh twice as much.

Burly, what th.curve are you running? And yes, grab the fan for that motor, it will do wonders.

I did something different for my flights today. First off I swapped out the 11T for the stock 13T pinion. Then I set the th.curve to 0-70-85-87.5-90. Next I enabled idle-up and set that to 90-87.5-85-87.5-90 and gave that a try. The first flight was in normal and the wind was taking it like a kite. It got so far away one time that I wasn't sure I could get it back. After a 5min flight the battery was warm but not hot and I it only took 1342mAh to fill up the 2100 pack. Not bad. So then I flew a 6min flight in normal and again the heli was getting away from me in the wind. Hovering is fine but in ff it would rise like crazy and I couldn't stop it. Put 1610mAh back in that time. Then I ran the 3rd battery in idle-up. Wow and I know I should know this but wow does it do better in the wind. When I would be flying into the wind and I would want to stop it, I would just drop the throttle a bit and pull back. If it rose at all I just dropped it more. The heli felt all kinds of better. Duh I know I should have been doing this for a long time but frankly I just forgot to do it. Anyhow after a 6min flight I only put back in 1293mAh What the hell is up with that? Maybe holding the head speed more constant makes it way more efficient?

Anyhow with a 13T and hover at nearly 90 throttle, the Mini will climb like 100ft a sec. It is scary! Actually I jut blipped the throttle hard when I first got into the air and it scared me bad. Wow can it climb. I think that now that I am used to the Mini, the 13T is doing very well and I am going to enjoy it.

- Chris

Variety+spice+life+supporting_paper_towel_industry=
King2+Rex450+Protos+Concept30
07-06-2008 08:16 PM
 
 
toolman18
Key Veteran
Location: Portland, Texas

Good to hear TJ.

Since i dont have the notion to invert, i rund my curves a little different. Everything is the same with exception to the pitch curve. I only let it have -2 degrees at low. It has plus 9 at the top but at mid stick im 75 on throttle and +3 or 4 degrees pitch. It works for me. No problem with the wind taking it away. I put about 1200-1300 back in after 6 minutes.

These are all approximations since i havent looked at my curves in a while. I do not reccommend anyone use them because i dont really follow directions well. I like to do my own thing and it works great for me.



We need video proof around here.
07-06-2008 08:28 PM
 
 
tryan02
rrProfessor
Location: Canton, Missouri

Idleup helps flying in wind you say?

I have -3/+11 in normal midstick is 70% throttle with +2 degree pitch guess big birds need a little more to keep them in the air.

Idleup is -12/+12 100%-70%-100%

And the REX is every bit as fast and faster than my king.

Canton MO backyard flying club
Club President
Team No funds left.
07-06-2008 08:48 PM
HOMEPAGE  
 
 
Gregor99
Elite Veteran
Location: Western Wa

Quote 
Then I set the th.curve to 0-70-85-87.5-90. Next I enabled idle-up and set that to 90-87.5-85-87.5-90

How can idle-up be helping? Throttle curve is the same above mid-stick. Unless you are talking about coming down in the wind, going below mid-stick.

Canton MO backyard flying club
West Coast Chapter
07-06-2008 09:53 PM
 
 
TJinGuy
Elite Veteran
Location: Socorro, NM - USA

Of course it is Greg, why would it not be?

Using some negative pitch and still maintaining the head speed is the important change. Before when I got below midstick, the throttle started to drop and there was very little neg pitch. Now the throttle holds steady and I have neg pitch to use if I need. The biggest difference I have noted is that when it lifting at zero or slight neg pitch in the wind and it finally does start to fall, I have a hard time catching it because the throttle has dropped. That requires me to grab a bunch of collective. Now I can go a little negative and the stop it hard with just a little positive pitch. It is all about the flat throttle curve I think.

I want to make a point here. Every time people talk about normal vs idle-up, I always hear stuff like "It was windy so I went to idle-up and the extra head speed helped a lot". That had nothing to do with it. It is just your curve settings. You can setup normal any way you want. I am firm believer that the only difference between idle-up and normal should be the first two throttle curve settings and a symmetrical pitch curve. The last 3 pitch and throttle numbers should be the same. If you want another different curve then use idle2. Anyhow that is how I think.

- Chris

Variety+spice+life+supporting_paper_towel_industry=
King2+Rex450+Protos+Concept30
07-06-2008 10:46 PM
 
 
tryan02
rrProfessor
Location: Canton, Missouri

Quote 
"It was windy so I went to idle-up and the extra head speed helped a lot". That had nothing to do with it. It is just your curve settings.

Very true I am one that speaks of the headspeed as I only have one idle setting and its flat within 15% on the king 80-95%. And on a windy day when I first started with the little king and a 8t pinion I got it up one day and couldnt get it back down in normal mode. Scary as a newb to watch your heli just drifting away. I had to take it up 100ft and nosedive nosein to get it back to me I kissed it goodbye and hoped for the best. Shortly after that was when I started flying idleup. Then changed to a 10t pinion also.

But Ill keep saying you guys need to get as comfortable with idleup as you are normal. Negative pitch is used even in normal flight believe it or not. And it helps the cyclic and the collective work faster with the headspeed already there and runs the motor at a more efficient area and gives longer flight times doing so. How could you not want to fly idleup?

Canton MO backyard flying club
Club President
Team No funds left.
07-06-2008 11:07 PM
HOMEPAGE  
 
 
TJinGuy
Elite Veteran
Location: Socorro, NM - USA

But all that neg pitch is scary!

- Chris

Variety+spice+life+supporting_paper_towel_industry=
King2+Rex450+Protos+Concept30
07-06-2008 11:20 PM
 
 
tryan02
rrProfessor
Location: Canton, Missouri

Its scary but Dont you like having more control over the heli? BTW I just finished waxing my off road vehicle the Jeep Compass.

Canton MO backyard flying club
Club President
Team No funds left.
07-06-2008 11:22 PM
HOMEPAGE  
 
 
TJinGuy
Elite Veteran
Location: Socorro, NM - USA

Oh yeah ... I drove over some rocks today in my off road Jeep and it is dirty as hell ... just the way I like it

- Chris

Variety+spice+life+supporting_paper_towel_industry=
King2+Rex450+Protos+Concept30
07-06-2008 11:28 PM
 
 
136 pages [ <<    <     62      63     ( 64 )     65      66     NEXT    >> ]26278 viewsPOST REPLY
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e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Did you fly today?
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