Minimum Headspead

[Jactor]

Just trying to find what would be the minimum headspead suitable for foward flight on the Hurricane. Trying to get maximum runtime out of my 2250mAh batteries. Does anyone have any flight current draw for the hurricane at lower headspeeds.

[oppie]

Go to the Ready-Heli site and on the left side of the page under Quick links go to the Head Speed Calculator. There you can put in your data and it will tell you what the head speed will be at 80%. For forward flight all you need is 1850. For 3D you need to get around 2200.

[ke6d]

Go to the Ready-Heli site and on the left side of the page under Quick links go to the Head Speed Calculator. There you can put in your data and it will tell you what the head speed will be at 80%. For forward flight all you need is 1850. For 3D you need to get around 2200.

I am running 1700-1800 headspeed on mine. I use the RCP H/18 motor with 13 tooth pinion. Even at 1800 headspeed, I can do big loops, rolls, and all the standard 3D maneuvers. My 2200 mAHbattery packs last for 4:15 min (putting back 1600 mAH) If you are only interested in FF, I am pretty sure you can run at much slower headspeed than 1800.

For a set of 2200 mAH packs, I would not fly longer than 5:30 min. Trying to squeeze every possible second out the packs will kill the battery very quickly. I would suggest you start your timer at 4:30 min, fly the heli, take a log of the current charger is putting back. Increase the timer until the charger is putting back around 1600-1700 mAH.

Dan

[Jactor]

Thank you for the replies. My kit came with the 75 amp esc and 1100kv (1500W) motor I am currently running a 61T front main gear and 15T motor pinion. Using the headspeed calculator gives me a headspeed of 1870 at 100% efficiency and 1777 at 95% efficiency. I have my throttle curve set around 85% at hover and the Hurricane kinda feels a bit funny when flying (I can only compare it to my trex 450 which has around 2800rpm) it almost feels mushy in the cyclic controls kind of like the trex in normal when the headspeed drops a little bit too much when descending (before I started flying in idle up)

I'm trying to keep the headspeed down to help the batteries chances of survival - I dont have a tach or Eagletree logger yet so I cant measure headspeed or current draw only get the average by calculating from mAh put back into the packs when recharging. I brought the hurricane to help me with circuits and forward flight I can currently do figue 8's with nice banked tunrns on the trex (but it gets small very quickly the further you go out - hurricane is nice and big and part prices are very appealing here - cheaper spares than my 450) and am trying to keep it on on a budget so I would like to try and keep using my 2250mAh batteries if possible. Once or if I get in to harder style flying I'll get some 3300 mAh batteries for this and bump the headspead up.

Any ideas on the limit of the standard wood blades and plastic grips?

Thanks again Jactor

[ke6d]

Thank you for the replies. My kit came with the 75 amp esc and 1100kv (1500W) motor I am currently running a 61T front main gear and 15T motor pinion. Using the headspeed calculator gives me a headspeed of 1870 at 100% efficiency and 1777 at 95% efficiency. I have my throttle curve set around 85% at hover and the Hurricane kinda feels a bit funny when flying (I can only compare it to my trex 450 which has around 2800rpm) it almost feels mushy in the cyclic controls kind of like the trex in normal when the headspeed drops a little bit too much when descending (before I started flying in idle up)

I'm trying to keep the headspeed down to help the batteries chances of survival - I dont have a tach or Eagletree logger yet so I cant measure headspeed or current draw only get the average by calculating from mAh put back into the packs when recharging. I brought the hurricane to help me with circuits and forward flight I can currently do figue 8's with nice banked tunrns on the trex (but it gets small very quickly the further you go out - hurricane is nice and big and part prices are very appealing here - cheaper spares than my 450) and am trying to keep it on on a budget so I would like to try and keep using my 2250mAh batteries if possible. Once or if I get in to harder style flying I'll get some 3300 mAh batteries for this and bump the headspead up.

Any ideas on the limit of the standard wood blades and plastic grips?

Thanks again Jactor

I have the same motor (1100KV) but only rated for 1000W. I use a 13 tooth pinion and stock gears (42 front, 61 rear) to get the headspeed down to about 1800 rpm at 85% (measured by the Eagle Tree data logger) The headspeed calculation predicts a headspeed of around 2000 rpm at 85%.

As mentioned above, I can fly for 4:15 min on a set of 2200 mAH packs.

I would not run the wood blades/plastic grips higher than 2000 rpm.

Hope this helps,

Dan

[bstock]

What you are describing... really sounds like you are going to need to get your headspeed up.

It sounds like you are looking for more pop.

You are going to give up more battery... but this heli is more fun & a little easier to fly (even for the novice) with a little more pop... and it sounds like that is what you are looking for.

If you want to fly those batteries... your 1500w motor is just to hot for long flight times.

The most efficent motor that guys have tested so far... is the Zpower Z20 980kv. That would be my choice for your 2200 batts.

You can also get a Rator30 flybar... it is longer... and many have said it helps the cyclic (which it also sounds like you are looking for) ... especially at lower headspeeds... so try that for sure.

Brushless setups run at higher efficiency above 85%. They develop smoother power and are more efficent doing it. I see you mentioned you are running 85%... try 90... and see if that helps a little... I think it might.

I have the RCP 1100kv 1500w motor (it sounds a lot like yours) & 75a align esc... with Revco gears on a 22t pinion. I am running 100%... and have been thinking of slowing it down a little to 90 or 95%. It POPs now... climb outs (my best trick so far *grin*) are hard and fast - pattern flying like you - with 500 carbons blades. Not sure on the head speed... but it is over 2000 easily. Metal head.

With 3200 batts... I get 6.5 - 7 min (more often 6.5)... putting back 80%... if that helps you to figure out what your 2200 might provide for time.

I would shoot for 1900 hs - and see how you like that. Try starting there... to get it to feel closer to your 450... and you can go from there.

Hope this helps - Brent