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Hobbyking Pitts Special EPO Plug-n-Fly BL (RED MO)
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Fur@X View Drop Down
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Posts: 3 		  Quote Fur@X Quote  Post ReplyReply Direct Link To This Post Topic: Hobbyking Pitts Special EPO Plug-n-Fly BL (RED MO)
    Posted: 28/Aug/2011 at 10:13pm
Hi, I bought the Pitts Special Hobbyking EPO Plug-n-Fly BL and the engine is broken. The red cable is cut and it is impossible to resolder.

I search for another, but I do not have the information necessary to find the (Kv, Max Load, No Load Current, Suggested Prop, Weight) etc ...

Could someone help me?

Url : http://www.hobbyking.com/hobbyking/store/__12483__Hobbyking_Pitts_Special_EPO_Plug_n_Fly_BL_DE_Warehouse_.html
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trumpy View Drop Down
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Posts: 2983 		  Quote trumpy Quote  Post ReplyReply Direct Link To This Post Posted: 28/Aug/2011 at 10:40pm
Hi Fur@x , welcome to the forums , I dont have this plane , but was wondering if you could measure the diameter of the motor and the bell length , so that way we will at least know what size of motor to suggest for you .
From what I read these planes were a little bit underpowered to begin with , so it might be good to upsize a little ?

From what I can find the stock motor and esc, on 3S batteries is drawing about 10A which is on the limits for the esc , I would suspect we would need to look for a 2000 odd kV motor putting out around 100-110Watts ?

7X5 or 8X3 props used
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Posts: 3 		  Quote Fur@X Quote  Post ReplyReply Direct Link To This Post Posted: 29/Aug/2011 at 12:19am
Hi Trumpy,

Thank you for the quick response. I measured the motor.

It has a diameter of 27mm and a height of 10 mm.
The length of the threaded rod for mounting the propeller is 250mm.

The propeller aircraft are provided with the 07X05.

I use NONA TECH TURNIGY 25-50C 3S 1000 mah.
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Posts: 2983 		  Quote trumpy Quote  Post ReplyReply Direct Link To This Post Posted: 29/Aug/2011 at 7:07am
Does it look something like this ?
2409 bell motor

These little bell motors are plenty powerful and would give your std system a boost I think , but they might need a bigger esc
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Posts: 3 		  Quote Fur@X Quote  Post ReplyReply Direct Link To This Post Posted: 29/Aug/2011 at 6:10pm
Yes, it looks like my engine, I also found this model to look more towards it.

http://www.hobbyking.com/hobbyking/store/__2069__hexTronik_24gram_Brushless_Outrunner_1300kv.html

If I take the engine you advise me, what esc would take you?


Thanks
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trumpy View Drop Down
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Posts: 2983 		  Quote trumpy Quote  Post ReplyReply Direct Link To This Post Posted: 29/Aug/2011 at 7:11pm
Ok the 2409 I linked to would need a 25A ESC , the Plush 25A

One thing to consider tho , is that these bigger bell motors might weigh a bit more than your Std motor , they will however give you about 2X the power tho lol
You might have to play a bit to get the CG right .

The link to the 20 gram motor you posted shows me it only puts out about 80 Watts and is probably a little less than the stock motor performance

A compromise in weight between the two would be the 28-22 a little heavier than stock motor , but with much more power ... unlimited vertical on this one I think LOL
Move up to a 9X4.7 prop again with the Plush esc I linked to

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Posts: 57 		  Quote gungasnake Quote  Post ReplyReply Direct Link To This Post Posted: 24/Nov/2011 at 12:06am
Originally posted by trumpy

Ok the 2409 I linked to would need a 25A ESC , the Plush 25A

One thing to consider tho , is that these bigger bell motors might weigh a bit more than your Std motor , they will however give you about 2X the power tho lol
You might have to play a bit to get the CG right .



You shouldn't have to, just get rid of the two steel weights and adjust the prop to pull visually straight (get rid of the 50 degrees of right offset...).

As I mentioned on another thread, I was not able to get the airplane to fly as it was shipped but it flies perfectly well once the over-engineering is removed.
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