More power needed for my HK450

[Tony]

Wow, me fly a gobby... Wow.... Need that on video... Haha

That would be mint

[Derek]

I'm making my own radio bag. Started on it two nights ago. Should be pretty nice!

Lee....can I come to Spain and fly your Goblin??? ha ha ha

[Derek]

First off..do you have a timer set on your tx? I noticed that both those flights were more than 6 minutes each. How many MAH are you putting back into the batteries when you charge them?

Next, from what I've heard, colder batteries will perform differently than warm ones. if you feel comfortable with the idea, put your fresh batteries in your coat pocket, preferably an inside pocket to keep them warm before a flight. Some people don't want to do this because, well let's face it, lipo's can be dangerous. I keep my packs in my coat pockets and haven't had an incident.

A higher C rating, as suggested, would possibly help. I have the Turnigy nano tech 2200mah 45C packs. They are 45C constant and 90C burst. I'm starting to progress with my mild 3D and this packs never even come down warm...and no signs of puffing. Over 30 flights on each of the 3 packs. In your other thread, you mentioned seeing a turnigy battery that had 25 contstant and 50 burst. I'd look for something with a higher "constant" C rating. Ive puffed all my 20 and 25C packs, lol. You were also questioning the COG. A high C rating pack won't change the COG. To my understanding, the packs are the same size, just made differently.

Ok....here's the one that I'm most curious about. What is it about Idle Up that bothers you? is it the high head speed? Twitchy cyclic? Even if you do get a newer motor, I think you'll find happiness and smoothness with a higher head speed.......lot less bog than the lower head speed. As far as the twitchy cyclic...you can dial down your dual rates a bit (I wouldn't though). Or you can add more Expo (this is what I recommend). Add a bit of expo to the aileron and elevator and try the idle up. I think you'll notice a difference. At one time, I was running 70 % dual rates and 15% expo. Then I got more confident with the helicopter and more confident with myself, now I'm at 80 or 85% dual rates and 10% expo. My 450 is very crisp....I love it.

Good luck buddy! Keep us posted! Stay warm!!!

[Tony]

Thanks for all that info Derek..

I'm getting just over 2200ma back into the lipos, charged at 1.1amp. Bare in mind these are all new lipos, on there 4th cycle now.

I set my timer to 4 minutes the other day but I keep forgetting to flick the switch...lol, and 4 mins is probably wrong anyway...haha

I usually keep the batteries in the jeep, then just put them on picnic table when there done...guess I could keep them in pockets, I'll try today..

Yeah Clay suggested a higher C discharge rate, I'll order one today to test...

Ok IU scares me because of the negative pitch below half stick, last time I done that on the blade I nearly went through the ground to Aussie land... Haha, it's easy to forget this when you never used it before...

It's not the HS now, unlike the blade that topped well over 3500 before it destroyed itself...

So today I have set it up as follows

Normal

Throttle 0,40,85,85,85

Idle up

IU 95,92.5,90,92.5,95

My pitch curve is 40,44,50,75,100

IU is the same as above, I've changed it to get rid of that fear of negative... I will learn one thing at a time I think...

Got 5 packs to get through today, so off I go..

[KevG]

Are you sure your putting 2200 plus back into a single lipo, that is 100% capacity,

[cml001]

Wow.. 2200 @ 80% should be around 1760 being put back in... Starting voltage at 4.2 per cell.. Finished flight voltage at 3.7'ish.. On ur bird u should be getting 5-6min flight times depending... Trac it while u fly today.. If u constantly drain packs that low... Packs won't last long & ur likely to run into voltage cutoff depending on ur ESC settings. Yeah trac u #s today.. Good luck bud!

[Tony]

Are you sure your putting 2200 plus back into a single lipo, that is 100% capacity,

Absolutely, I'll photograph the charger display on next charge..

[Tony]

Wow.. 2200 @ 80% should be around 1760 being put back in... Starting voltage at 4.2 per cell.. Finished flight voltage at 3.7'ish.. On ur bird u should be getting 5-6min flight times depending... Trac it while u fly today.. If u constantly drain packs that low... Packs won't last long & ur likely to run into voltage cutoff depending on ur ESC settings. Yeah trac u #s today.. Good luck bud!

Yes I realised today I'm flying far too long, I keep forgetting to flick the timer switch which I have set for 4 mins at mo...

If you look at length of videos they are far too long flight times....

[KevG]

You could set timer to activate with throttle you can't forget then

[Tony]

Is that on dx6i Kev... Nice if is

[KevG]

Yes I think so

[KevG]

Sorry Tony I lied it's only on two switches

[Tony]

No problem mate, my tx is in jeep otherwise I'd of looked on it. Lol

[Tony]

Update on my battery charger, over 2200ma on display. Obviously discharging far too much.

image.jpg (1.64 MiB) Viewed 2708 times

[KevG]

I should coco,

You defo need to get your self to use the timer all the time,

[Tony]

Yes I will Kev, it's a must, the other switch on the timer is the TH cut, can't see me using that either, unless I get into the habit of using it as soon as I power up TX. Maybe set it for an extra 30 seconds or so, give me time to power heli up and initialise... I remember WC on YT having a talking one..... Hmmmm, eBay here we come...lol

[Derek]

Yeah, you are definitely over discharging by a lot! Your charger shouldn't put back more than 1760mah.

Also....as far as your Idle Up...there is no reason that you can't set your Stunt Mode to a throttle curve that is the same as your Normal Mode curve, below mid stick, and then have a bit more RPM above mid stick.

For example:

Normal Mode: 0,40,85,85,85 (which is what you have already)
Stunt Mode: 0,40,95,95,95 (which would be a combination of your normal mode curve and your Stunt Mode curve)

"Idle up" doesn't mean that you "have" to have a flat curve. It's your tx...set it up the way that suits you. Then, instead of referring to it as "Idle Up", simply refer to it as "Flight Mode" or something similar.

Then, have your "Flight Mode" curve the same as your "Normal Mode" curve (40,44,50,75,100) and you would have no hard negative tendencies. To soften the negative pitch even more, change your Pitch Curve to 46,48,50,75,100. That's what I have my normal mode curve set at for all three of my helicopters and I've set Dustin's the same way. That way, I get just a bit of negative below mid stick.

[Tony]

I think it's down to over discharging Derek, I'm taking far too much out of the battery, so the charger puts back whatever current is necessary to get the voltage back up to charged V 12.60 volts..

Yes I'll play around with the curves Derek until I'm happy with them, I'll never be doing any flying really that requires those hard pumps. Hopefully, saying that I nearly crashed today. Hands were so cold.. I'll get the video posted soon. Took 5 packs, only got through 2. Too cold..

Anyway I'll find a happy medium based on all your variations and Clays, I quite liked the V curve. I'll change pitch so they are both the same. I actually did that this morn, and whilst driving I thought "will that really work?" Anyway when I got to field I changed it back to linear.. Lol

My IU is 95, 92.5, 90, ,92.5, 95... It feels good..

[Derek]

if you are feeling good with the V curve, then you are making progress and you are getting comfortable...despite the cold weather, lol. Very cool, Tony!

I promise you that having the same curves on Normal mode and Stunt Mode will work. Don't think of it as an "Idle Up". Don't think of it as "Stunt Mode" Simply think of it as a secondary way to fly....with a bit more RPM. When you fly, with the switch in Pos 1, that's the take off mode and casual flying...no worries there. Then, you can flip into your secondary flight mode, Pos 2, and have a bit more RPM for smoother flight and crisper response.

It will work!

Sounds like you've learned quite a bit today and you've had some great successes today. Nice job!!!

[Tony]

Hey Derek, if it wasn't for you guys I'd learn nowt... Lol.. Something I can pass on when others join with similar problems...

Yes I'll do that with the idle up. Set the pitches the same... Keep V curve...

Thanks Derek..