Search: Posts Made By: Dr Kiwi
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03-26-2014, 04:55 PM
Replies: 7
Views: 472
Posted By Dr Kiwi

Nothing yet. My idea is a 40-46 ( leaning to the...

Nothing yet. My idea is a 40-46 ( leaning to the 46) brushless , a 60 a esc and I have a battery that will do the job. I will use Futaba equipment. Now I need to save a little money and begin...
03-26-2014, 04:25 PM
Replies: 3
Views: 349
Posted By Dr Kiwi

This might be useful reading....

This might be useful reading. http://www.generalhobby.com/arfmfg-sukhoi-su26-30cc-version-airplane-p-577.html

Since the equivalent of the single gas engine is suggested as 1800-2000W you can...
Replies: 14
Views: 828
Posted By Dr Kiwi

At a guess I'd say about 12x6 on 3s would draw...

At a guess I'd say about 12x6 on 3s would draw ~20A.

I'd certainly start with no more than 10" with my Wattmeter in hand!
Replies: 2
Views: 435
Posted By Dr Kiwi

Something like this:...

Something like this: http://www.e-fliterc.com/Products/Default.aspx?ProdID=EFLM4046A

Personally I'd use 5s if you want the 11x7... 4s would need 13"-14" prop.
03-23-2014, 11:09 AM
Replies: 12
Views: 639
Posted By Dr Kiwi

If you are wanting to simply shut off current...

If you are wanting to simply shut off current supply, Kurt's suggestion in his Post #2 [the Maxx Products jumper) makes the most sense. But if you have to switch batteries in and out then a hatch may...
Replies: 5
Views: 444
Posted By Dr Kiwi

If you go to 10S with a 6.7:1 gearbox Motocalc...

If you go to 10S with a 6.7:1 gearbox Motocalc suggests it will get you this (under 50A but watts-in ends up well over the rated 1200W). I honestly have no clue as to whether it can cope with these...
Replies: 5
Views: 444
Posted By Dr Kiwi

On 5s and limited to 35A -50A you'd need a tiny...

On 5s and limited to 35A -50A you'd need a tiny prop.

MotoCalc suggests that 5x5 seems okay, 6x4 is a bit much:

Motor: Hacker C50 13L; 1874rpm/V; 1.27A no-load; 0.0172 Ohms.
Battery: Thunder...
Replies: 5
Views: 444
Posted By Dr Kiwi

Is it a 10L, 13L, 14L, 15L... in other words...

Is it a 10L, 13L, 14L, 15L... in other words exactly which model do you have and what is its Kv. What gearbox do you have on it?
Replies: 3
Views: 612
Posted By Dr Kiwi

There are cheaper roughly equivalent motors to...

There are cheaper roughly equivalent motors to that PKZ4416... this one is an ounce lighter, $25 cheaper, but might be better:...
Replies: 2
Views: 1,145
Posted By Dr Kiwi

http://www.rc-super.com/download/mysteryCloudESC_2...

http://www.rc-super.com/download/mysteryCloudESC_20A30A.pdf
Replies: 14
Views: 828
Posted By Dr Kiwi

My mistake.. I looked up Himaxx 2815 and their...

My mistake.. I looked up Himaxx 2815 and their chart said 3.2mm for the three lower Kv versions... but I missed the fact that the -4000 is 4mm!!...
Replies: 1
Views: 308
Posted By Dr Kiwi

Give Castle a call!

Give Castle a call!
Replies: 14
Views: 828
Posted By Dr Kiwi

I think that a 28mm OD motor would fit, but, yes,...

I think that a 28mm OD motor would fit, but, yes, you'd need 3.2mm pinions.

Here is an Exceed 2220 motor (28mm OD) in a similar gearbox.
...
03-16-2014, 03:45 PM
Replies: 7
Views: 981
Posted By Dr Kiwi

Your link shows 99 Euros.. this RC Timer 100A ESC...

Your link shows 99 Euros.. this RC Timer 100A ESC is $29.99 http://www.rctimer.com/product_155.html Admittedly it only goes to 7S rather than 12S but ... is yours $108 'better'.
Replies: 14
Views: 828
Posted By Dr Kiwi

This should work for a 28mm OD motor....

This should work for a 28mm OD motor. http://www.allerc.com/hyperion-aluminum-hi-watt-gearbox-400-v2-p-1579.html
Replies: 14
Views: 828
Posted By Dr Kiwi

Oh heck... sorry... that battery was just in...

Oh heck... sorry... that battery was just in MotoCalc and I didn't correct for what you actually need! ANY battery which can deliver ~25A will do (1000mAh/30C... 2000mAh/15C... etc... would...
Replies: 14
Views: 828
Posted By Dr Kiwi

Why don't we go with your 25A ESC and an 8x4 APC...

Why don't we go with your 25A ESC and an 8x4 APC E: I'm guessing your motor would fit a GWS 400-style gearbox. One can get several different ratios....
03-13-2014, 07:50 AM
Replies: 4
Views: 385
Posted By Dr Kiwi

On any particular voltage the motor will only...

On any particular voltage the motor will only draw as much as the prop demands.
03-13-2014, 07:41 AM
Replies: 8
Views: 1,227
Posted By Dr Kiwi

The PJS 1000 is an 85g 1000Kv motor rated for...

The PJS 1000 is an 85g 1000Kv motor rated for 25A... so...this is pretty close: http://www.hobbyking.com/hobbyking/store/__16230__NTM_Prop_Drive_Series_35_30_1100kv_380w.html
Replies: 14
Views: 828
Posted By Dr Kiwi

The plane is around 32oz so the Himaxx is well...

The plane is around 32oz so the Himaxx is well suited for good aerobatic performance at close to 150W/lb...., since it is rated for 275W (86g @ 3W/g is close enough) .......(the 57g Hacker can't...
03-12-2014, 06:12 AM
Replies: 6
Views: 646
Posted By Dr Kiwi

About 3.4v under load is a good LVC level. You...

About 3.4v under load is a good LVC level. You should not drain more than ~80% of your packs capacity, so it is a good idea to time a few typical flights to LVC, and then see how much you are putting...
03-09-2014, 08:56 AM
Replies: 3
Views: 634
Posted By Dr Kiwi

http://edfhobbies.com/index.php?route=information/...

http://edfhobbies.com/index.php?route=information/information&information_id=7

...
03-07-2014, 05:42 PM
Replies: 2
Views: 802
Posted By Dr Kiwi

The issue with changing to Lipo is that 2s is...

The issue with changing to Lipo is that 2s is 7.4v nominal, 3s is 11.1v nominal... if you had previously used 8-cells (~9.6v nominal) the stock Zagi Speed 400 motor will be lower powered on 2s, but...
03-07-2014, 03:00 PM
Replies: 2
Views: 5,633
Posted By Dr Kiwi

1.) When do you have to use an external BEC vs...

1.) When do you have to use an external BEC vs the one internal on an ESC. Is it a hard fast rule that when your supply battery is over 12v (from the "Everything you wanted ..." eBook) you have to...
03-06-2014, 05:24 PM
Replies: 3
Views: 1,057
Posted By Dr Kiwi

http://www.e-fliterc.com/Products/Default.aspx?Pro...

http://www.e-fliterc.com/Products/Default.aspx?ProdID=EFLM4032A (http://www.e-fliterc.com/Products/Default.aspx?ProdID=EFLM4032A)

This is probably a better choice at only 770Kv.

This might work...
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