Best esc/motor combo?

[Nelsonisms]

Originally Posted by torch8

I going to stick to regular pinion as I only fly my 450 on the weekends and wish to save extra $ for spare parts. Can anyone share information on the pinion they used on Eflite H450? My 450 is grounded until new motor/pinion.

Basically what you're looking for are 0.5 mod 3.17mm bore pinions.

The 0.5 mod basically means the size of the teeth. So an 0.6 mod pinion will have larger teeth than one with 0.5 mod. The 3.17mm bore means the diameter of the hole that fits over the shaft.

These kinds of pinions are fairly common and easy to come by.

Here are a few sources...

http://www.horizonhobby.com/products...0A#t4-OPTIONAL
http://www.innov8tivedesigns.com/index.php?cPath=60_73
http://www.helidirect.com/motor-pini..._44_78_513.hdx

My Scorpion 2221-8 motor is basically the same as the H450 for all intents and purposes. I am running a 13T pinion, but that is with a governor to keep the headspeed capped under 3350 rpm. If you are not running a governor, I'd stick to a smaller pinion at first.

Use this calculator to figure out which pinion to use for your desired head speed. When evaluating the results, use the middle and end speeds as a comparison.

http://heli.dacsa.net/calcv3/Default.aspx

For example, given a 12T pinion on the stock 140T main gear at 100% throttle...

Hover RPM at beginning of flight: 3631
Hover RPM at middle of flight: 3344
Hover RPM at end of flight: 3228

A general rule of thumb is that steps of roughly 200 rpm will give you noticeably improved collective response at the expense of decreased flight time. The table below is a good starting point of reference.

2800 = light sport flying
3000 = mild 3D
3200 = moderate 3D
3400+ = hard 3D

[torch8]

Thanks Nelsonisms, this is wonderful hobby learning as I go. No 3D for me so I will try 10T.

[Nelsonisms]

Originally Posted by torch8

Thanks Nelsonisms, this is wonderful hobby learning as I go. No 3D for me so I will try 10T.

Now that I look at the numbers, I think I'd probably recommend 11T over 10T for you. The low end on the 10T looks pretty low...about 2690 rpm which is getting down into the very mushy range. The 11T will give you around 3000 rpm tops and allow you a little room to run a lower percentage throttle curve if you wish to drop it down a little bit closer to 2800 rpm. The most common size pinions for this motor combination are 12T to 14T. So if you think you'll plan on flying it harder in the near future, I'd pick up a 12T pinion while you're at it.

Given a 11T pinion on the stock 140T main gear at 100% throttle...

Hover RPM at beginning of flight: 3328
Hover RPM at middle of flight: 3065
Hover RPM at end of flight: 2959

[torch8]

Just purchased 12T

http://www.helidirect.com/rhino-gear...450-p-6695.hdx


Can't wait to get it going.

[Nelsonisms]

Originally Posted by torch8

Just purchased 12T

http://www.helidirect.com/rhino-gear...450-p-6695.hdx

Can't wait to get it going.

I think you made the right choice. It will be plenty fast on the top end and you'll have plenty of wiggle room on the low end before you get under 2800.

[Raysun]

Thinking of going to the 450H motor, my 440H finally blew its case side bearing and locked up (short auto onto soft grass...no damage). No way to get the bearing race out, so in the round file...but it did last one whole year. Installed a spare 440 HH had sent me but I don't expect it to last.

Question...how much effort is needed to fit the 450H...understand its not a drop in?

Thanks in advance

Ray

[Nelsonisms]

Originally Posted by Raysun

Thinking of going to the 450H motor, my 440H finally blew its case side bearing and locked up (short auto onto soft grass...no damage). No way to get the bearing race out, so in the round file...but it did last one whole year. Installed a spare 440 HH had sent me but I don't expect it to last.

Question...how much effort is needed to fit the 450H...understand its not a drop in?

Thanks in advance

Ray

As far as I know it's a direct drop in to the stock motor mount. At least I seem to recall people saying as much in here. Just be aware that motor has a different size shaft diameter so you'll need to get a pinion that will fit the 3.17mm diameter shaft. It's also a lower KV so make sure you understand that and get the appropriate pinion gear for your desired headspeed. If in doubt I'd recommend starting with a 12T 0.5mod 3.17mm bore pinion.

I'm using the Scorpion 2221-8 which is pretty similar in size and bolt pattern AFAIK. On mine I opted to get the Lynx motor mount that allows a little more flexibility to shift the motor around for larger pinions and it has built in heat sink fins which may help a little with heat dissipation.

[taildragon]

Ive had the H450 motor in 2 different 450x frames. The first frame I had to dremel a little bit of the inside frame to give the motor mount some slack. The mesh was to tight until I did it. It worked out great.

The 2nd 450x frame that i'm running now I didn't have to make any mods. There was plenty of slack to adjust the mesh. I run the 12t pinion and straight 75 TC.

It's a very powerful motor. I'm not sure if I would run the stock servo's with this motor.
I run 5065mgs cyclic and 5083mg on the tail.

[vronny]

I just added the lynx motor mount with 450 motor no problem with the fit. I was using the stock mount just the wire come out the left side either mount should fit an not contact auto gear. I'm using 12t with stock main gear.

[FailureToFly]

I've run a few scorpion 2221 motors in my 450X with up to a 14T pinion (from 11T-14T) and never had to mod the frame/mount etc

Attached pinion and set mesh. Not a single main gear issue either.

[torch8]

H450 motor and 12T pinion don't have a way to check the RPM, what is ideal throttle curve for this motor? I don't 3D or sport fly just circuits and scale flying so I don't need crazy RPM.

My current TC using stock motor was Normal = 0,40,70,70,70 and Idle-up = 80% to 100% depending on windy conditions.

[Raysun]

Thanks guys, sounds like it will be a drop in with maybe a little Dremel work, no prob. I'm running an interim solution...a Turnigy motor I had lying around from my HK450 days. I've got Spektrum H3020's on cyclic, great servos.

Sure enough the NEW 440H replacement motor started issuing loud screeches at higher HS. POS.

Maybe a 450X V2 is in the way...properly equipped?

I don't worry about HS as long as it does what I want. The 440H motor while high RPM, is very easy to bog down...little torque.

Ray

[badbandit]

which motor timing and pwm rate did you set on your cc egde lite for your H450?

i am just programming it the first time and wonder, which the best values are.

[Krea]

Originally Posted by torch8

H450 motor and 12T pinion don't have a way to check the RPM, what is ideal throttle curve for this motor? I don't 3D or sport fly just circuits and scale flying so I don't need crazy RPM.

My current TC using stock motor was Normal = 0,40,70,70,70 and Idle-up = 80% to 100% depending on windy conditions.

I'm have the same setup and run 80% for 3D. It is similar to 100% on stock setup. You could get away with less but not sure how that impacts esc. I ran 75% but it didn't feel right to me.

[raisinjack]

found my answer-duh should have searched!!!!!!!!!