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HK-450GT CCPM Alloy T-Rex compatible - Part III

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HK-450GT CCPM Alloy T-Rex compatible - Part III

Old 08-20-2012, 10:43 PM
  #26  
ingleburn
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: mnemennth

Hmmm... How's your headspeed? If you're running slightly high pitch/low headspeed, the servo's gonna be pushing full pitch on the tailrotor, but still unable to counter the mainblades. Sure, you'll be able to get it up in the air, but you won't be turning the tailrotor fast enough to do its job, even at max pitch. Also, when you say it's "protesting" you mean a lot of noise but it turns OK, or both not wanting to turn and making lots of noise? I'd also check my slider travel on the tail rotor, make sure you have your limits set correctly on the gyro so it's not bottoming out. This can make your servo complain, though I don't know that I believe it would be loud enough to hear over the rest of the heli...

mnem
*DANGER!!!*Engineer thinking *DANGER!!!*
Id forgotten what throttle curve I had so just checked and it is 90-85-80-85-90.
Using a 12T pinion and thought that would be plenty.
Do you think I might need a bit more, maybe a flat 90?

Old 08-20-2012, 10:53 PM
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Just checked my head speed calculator and with that curve hover is roughly 2800 RPM. Maybe I need to be a bit higher.
Old 08-21-2012, 10:00 AM
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Phoenix Blathering Duex!

This Friday, same time, place and password. I am changing the audio to "direct sound" though. Hope to balther and fly with you then!

Cheers,
Ken
Old 08-21-2012, 08:06 PM
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: ingleburn

Just checked my head speed calculator and with that curve hover is roughly 2800 RPM. Maybe I need to be a bit higher.
I'd guess as much; most of the answers I got when I was first setting up recommended a headspeed of around 3000-3200 at 6ish degrees for hover; I remember with my first setup I was around 2600 at 8ish degrees and it just barely kept the tail going straight, and a bunch of wig-wagging anytime I touched the rudder. Running hottern'ell and really loaded up the tailrotor too. I'm still not exactly the best at programming the CCPM, so I'll let others offer their advice.

On another note -
I just got an eMail from HK on a wishlist item I signed up on when I first started my EXI450Pro build. They have the DLUX40AESC w/Datalogging back in stock at the USA warehouse; $20.29 after the usual thumb-twiddling period. It has a nice, compact footprint that I would have loved to try on my Pro, but it was OOS.

http://www.hobbyking.com/hobbyking/s...dProduct=18922

Hope that helps someone in need of a decent ESC at a reasonable price.

mnem
*Now suffering from mini-micro-itis*






Old 08-21-2012, 08:08 PM
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Sonuvacrap. Duplicate post; sorry guys.

mnem
It's kinda like déjà vu... kinda like déjà vu...






Old 08-21-2012, 11:04 PM
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Well an order from the AUS warehouse came to my house today! Mainly all for the upcoming quadcopter though...

2x2200mah 3S 35C batteries (bought these as they had the best value in discharge rates, apart from the 20C which is too low)
Accucel-6 LiPo charger as my mate hasn't got a lipo charger...
Extreme Accuracy Prop/Rotor balancer (Bought this because I haven't got a blade balancer and also to balance the props to have as little vibration as possible..
HK KK board which landed in AUS warehouse not too long ago. Nice and cheap.

Also found a HK550FBL from HK

Hope all is well
Old 08-22-2012, 12:31 AM
  #32  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: Kozzy_98
Well an order from the AUS warehouse came to my house today! Mainly all for the upcoming quadcopter though...
2x2200mah 3S 35C batteries (bought these as they had the best value in discharge rates, apart from the 20C which is too low)
Accucel-6 LiPo charger as my mate hasn't got a lipo charger...
Extreme Accuracy Prop/Rotor balancer (Bought this because I haven't got a blade balancer and also to balance the props to have as little vibration as possible..
HK KK board which landed in AUS warehouse not too long ago. Nice and cheap.
Also found a HK550FBL from HK
Hope all is well
I've got the Accucel-8 and it's been great. It's really neat we can get lipos from the au warehouse now.

Jonesy



Old 08-22-2012, 01:55 AM
  #33  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Anyone thought about using these.http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html
A serious battery but at a serious price.
Old 08-22-2012, 01:58 AM
  #34  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: mnemennth


ORIGINAL: ingleburn

Just checked my head speed calculator and with that curve hover is roughly 2800 RPM. Maybe I need to be a bit higher.
I'd guess as much; most of the answers I got when I was first setting up recommended a headspeed of around 3000-3200 at 6ish degrees for hover; I remember with my first setup I was around 2600 at 8ish degrees and it just barely kept the tail going straight, and a bunch of wig-wagging anytime I touched the rudder. Running hottern'ell and really loaded up the tailrotor too. I'm still not exactly the best at programming the CCPM, so I'll let others offer their advice.


Might try taking the curve up to 90% flat and see how that goes.



Old 08-22-2012, 02:05 AM
  #35  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

I reckon that unless the A-Spec batteries have a longer lifecycle than Nano-techs, they aren't really worth the extra $ unless you do Hardcore 3D, or if your motor sucks big amps.

Remember that 65Cx2200mAh=143000mAh=143 Amps Constant. This would give you a flight time of <1min, and thats really pushing the LVC...

However I have no idea how they would compare to nano-techs as I don't have any. Simon, Rob and Phil, care to order some and review them for us?


Old 08-22-2012, 02:43 AM
  #36  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.
Old 08-22-2012, 03:11 AM
  #37  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: Edmund2

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.
No thats not normal. Mine gets into a hover just over mid stick.
If your pitch and throttle curves are set right in the radio your batteries might be dying.

Old 08-22-2012, 03:12 AM
  #38  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: Edmund2

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.
If your using the default throttle and pitch curves from the manual, Iwould say no that does not sound right as you should be at 60% throttle at mid stick which is 0 pitch. Post up your throttle and pitch curves.

Old 08-22-2012, 03:26 AM
  #39  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: Edmund2

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.

Hiya Edmund!

Seat your main gear back into place by holding the your thumbs over the rotor button and using both index fingers, push the main gear back up into position!

b
Old 08-22-2012, 03:29 AM
  #40  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: rikybob


ORIGINAL: Edmund2

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.

Hiya Edmund!

Seat your main gear back into place by holding the your thumbs over the rotor button and using both index fingers, push the main gear back up into position!

b

+1

This can definately cause your problem. The main shaft should be sticking out the bottom of the main gear about 1mm. There should be no play if you move the main gear up and down.

Old 08-22-2012, 03:39 AM
  #41  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Thank you guys will have a look at it. Will also consult the manual as to how tho check let alone set the throttle curves as I do have a wrti up somewhere for the DX6i /mcpx combination. Will advise once done

Edmund
Old 08-22-2012, 03:45 AM
  #42  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: Edmund2

Thank you guys will have a look at it. Will also consult the manual as to how tho check let alone set the throttle curves as I do have a wrti up somewhere for the DX6i /mcpx combination. Will advise once done

Edmund
Posted this once before. This is a good place to start.



Old 08-22-2012, 03:51 AM
  #43  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Tx, exactly the one I have somewhere, now I can just screen dump this and print.

Edmund
Old 08-22-2012, 09:55 AM
  #44  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: ahamay

Does anyone use a servo tester, or have a recommendation for one ? I know some radios have servo testing functionality, mine doesn't. I want to be able to run servos on the bench for a time period before installing them.

Jonesy
Jonesy, if you have the field programming box for the tarot zyx FBL unit... you have a servo tester already. It's built in

jeff
Old 08-22-2012, 02:33 PM
  #45  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: ahamay


ORIGINAL: rikybob


ORIGINAL: Edmund2

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.

Hiya Edmund!

Seat your main gear back into place by holding the your thumbs over the rotor button and using both index fingers, push the main gear back up into position!

b

+1

This can definately cause your problem. The main shaft should be sticking out the bottom of the main gear about 1mm. There should be no play if you move the main gear up and down.

+1 I check/push mine up after every crash, I mean hard landing...I mean periodic maintenance!

Old 08-22-2012, 03:34 PM
  #46  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: Ddaddy


ORIGINAL: ahamay


ORIGINAL: rikybob


ORIGINAL: Edmund2

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.

Hiya Edmund!

Seat your main gear back into place by holding the your thumbs over the rotor button and using both index fingers, push the main gear back up into position!

b

+1

This can definately cause your problem. The main shaft should be sticking out the bottom of the main gear about 1mm. There should be no play if you move the main gear up and down.

+1 I check/push mine up after every crash, I mean hard landing...I mean periodic maintenance!

It's kinda funny, I crash mine ever other battery for a total of nearly a hundred crashes. I have never replaced a main gear, F/S etc. I finally DID manage to kill the actual frame!

Conversely a certain stodgy friend of mine from a from an evil empire has prollly only crashed his 1/2 dozen times. I don't know how he does it!!

Headin' out to the Flyin' Club tomorrow and look forward to gettin' shum schict time!

I cut off those big red connectors from my new 3000 batteries and soldered on my favorite XT connectors!

This gives me 7 batteries for the 500 size heli!

As for the blather fest on Friday, the irony that the "blathermeister" himself will have to absent is not lost on me!

I am attending a fundraiser for the neighbor across the street as having cancer is VERY expensive!

So instead of hanging out with you lovely folk I will be at an art gallery that has a cash bar[:@]

All for a good cause and will get to see the ladies dressed up!

All the best and look forward to a blatherfest in the future!

b
Old 08-22-2012, 03:43 PM
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: rikybob


ORIGINAL: Ddaddy


ORIGINAL: ahamay


ORIGINAL: rikybob


ORIGINAL: Edmund2

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.

Hiya Edmund!

Seat your main gear back into place by holding the your thumbs over the rotor button and using both index fingers, push the main gear back up into position!

b

+1

This can definately cause your problem. The main shaft should be sticking out the bottom of the main gear about 1mm. There should be no play if you move the main gear up and down.

+1 I check/push mine up after every crash, I mean hard landing...I mean periodic maintenance!

It's kinda funny, I crash mine ever other battery for a total of nearly a hundred crashes. I have never replaced a main gear, F/S etc. I finally DID manage to kill the actual frame!
b
I think the key to not toasting the feathering shafts is to not use the stock blades as they don't bend back far enough in a crash. You can dremel out a section of the stock blade so they bend back like the kbdd blades do...this will help avoid bent shafts.



Old 08-22-2012, 04:03 PM
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III


ORIGINAL: ahamay


ORIGINAL: rikybob


ORIGINAL: Ddaddy


ORIGINAL: ahamay


ORIGINAL: rikybob


ORIGINAL: Edmund2

Some advice please. Is it normal for a mCPX to only lift off with the throttle lever at about 90% of travel? Mine would spool up and only when I get almost to the end can I achieve lift off. Do not always want to fly in idle up mode working from the mid position then.

Hiya Edmund!

Seat your main gear back into place by holding the your thumbs over the rotor button and using both index fingers, push the main gear back up into position!

b

+1

This can definately cause your problem. The main shaft should be sticking out the bottom of the main gear about 1mm. There should be no play if you move the main gear up and down.

+1 I check/push mine up after every crash, I mean hard landing...I mean periodic maintenance!

It's kinda funny, I crash mine ever other battery for a total of nearly a hundred crashes. I have never replaced a main gear, F/S etc. I finally DID manage to kill the actual frame!
b
I think the key to not toasting the feathering shafts is to not use the stock blades as they don't bend back far enough in a crash. You can dremel out a section of the stock blade so they bend back like the kbdd blades do...this will help avoid bent shafts.




Ahhhhh mebbe that's it!

I used the stock blades for about a dozen flights then went to immediately to the KDBB for quality (perfect balance) and more importantly the bright orange for visibility!

b
Old 08-22-2012, 08:43 PM
  #49  
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

ORIGINAL: ingleburn

Anyone thought about using these.http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html
A serious battery but at a serious price.
Burn -
I've been abusing...err, using 2 of the 3S/2200/25-50C NanoTechs for almost 2 years; sometimes brutally overloading with bad motor/pinion combos (and a shorted out motor/ESC from time to time), sometimes by letting them just sit for a couple months at a time. They STILL test out at rated capacity, which is approx 8-10% decrease from capacity after the first 10 cycles. All in all, I am astounded they could sell a pack like this for $12, even on the swarm. I am similarly pleased with the two Zippy packs I bought a year ago for $9, though they haven't held up like the Nano-Techs; they are a year younger and already down to 90-95% rated capacity.

That said, I'm not certain any hobby flyer is going to push these A-Spec Nano-Techs to a point where they will live longer than a regular Nano-Tech simply due to age; therefore I don't know that I can justify spending even the $27.59 they're asking for these After Thumb-Twiddling, especially when the pack I bought for $12 is now $10.19 on the swarm.

OTOH - Just look at the prices of any "Name-brand" pack on any of the big USAsites, which I'm 95% certain these new A-Spec packs are equal or superior to... maybe we HK junkies have gotten spoiled? Are we simply jaded?

mnem
More power. Yumm.
Old 08-22-2012, 11:36 PM
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Default RE: HK-450GT CCPM Alloy T-Rex compatible - Part III

Well...
Ordered a massive order from HK full of well, bits and pieces! Things such as epoxy glue, hacksaw, the TGY-306G Servo and a dremel!

Also various parts for the quadcopter: ESCs, Props, Motors and alike!

Total order value was ~300$. This means I am currently in debt! (To my parents )

I have been keeping my thumbs in shape with the MCPX. It is such a great little helicopter, I just need to persuade myself to get outside and fly my 450s. Atleast when the weather is nice! Currently a thunderstorm is in my area, with windy days before that. Hopefully the weekend is clear!

Does anyone have any suggestions on a very efficient 450 motor that would give long run times? Something to learn hovers on, then I can swap it for a spare 2218 that I have. I heard that esky make a very efficient motor, but cannot recall the motor specifically...
Long flight times is what I am after @ my stage.




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