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Old Apr 29, 2003, 04:05 PM
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Central Fla
Joined Apr 2003
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Kyosho pitts special 40 size conversion

hello all

can anyone advise me of what motor combo i can use for the kyosho pitt special. it runs a .46 glow engine and weighs about 5.0lbs=80oz. this weight is without the engine acording to towerhobbies .46 it weighs 1.1lbs=16.9oz.

i really like the fact of not having to do any tweaking to the engine when going to fly.

if this is not possible can anyone tell me of an electric version of a scale looking pitts. hobby-lobby has one but its not what im looking for.

Thanks all
Wolfy
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Old Apr 29, 2003, 05:06 PM
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Jocke's Avatar
Sweden
Joined Dec 2001
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Im using this setup for my 35-60 sice converted planes.

Plettenberg HP/300/30/A2 (280g) max 1000W
Shultze Future 45 6-16 cells
14x CP 1700 cells for my smaler planes abaout 2kg 12x6-8 prop
and 14 sanyo 2400 cells for my 2,5-3,2kg planes 13x6-13,5x7 (14x4-5 for 3D)prop.

the HP300 motor swings the 13,5x7 prop at abaout 9300 RPM direct drive.
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Old Apr 29, 2003, 05:17 PM
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henke's Avatar
Sverige, Kronobergs Län, Ljungby
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Hi Wolfy

Welcome to the Zone!!

The Pitts is probably not going to be that light, approx 7lb or so by guess, so if you are looking for pattern style flying the pitts will make an exelent convertion!

I agree with Jocke, use 14-16cells SubC (Sanyo2600)

I have had good luck with the 13x6,5 prop, seem lite 13-14" props fits these planes best.

I like Geard motors(I know Jocke prefers Direct drive) , so I would use a B50 11s 5,2:1 swinging a 13x6,5, this will give you unlimited verticals and a flight time of about 6-8min depending on throttle management.


/Henke
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Old Apr 29, 2003, 05:33 PM
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I agree with Henke (if u like geard motor setups) it wold be the best setup, both Hacker and Plettenberg make great motors with very high quality, welcome to the zone.

Hehe...Henke u are a geared little devil :0)
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Old Apr 29, 2003, 08:46 PM
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Central Fla
Joined Apr 2003
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i would like to thank you all for the warm welcome. its greatly appreciated. i currently fly the great planes lear35 jet and also my first electric known as the kwik-e by gary wright which its because of the performance of this plane i decided to go all electric with my planes. but honestly my dream plane is a pitt special and i figured the kyosho would be the way to go. once again thanks for the welcome guys. can you guys give me some links to sites i can make purchases on these motors and batteries if possible. should i go nimh or should i go nicads. i hear nicads are better for speed vs the metal hydrates. can u explain this to me also. im an aircraft electrician but new to the r/c electrics so all the knowledge would help me develop my skills with my pitts project.

wolfy
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Old Apr 30, 2003, 01:27 AM
Our Daddy and Heli Junkie
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WELCOME Wolfy!!!!!!!!!!!

The Kyosho kits can easily be converted, but tend to be a bit on the heavy side.

The 2600 nimh cells are the best thing going right now for batteries (cept LP's)

Plug the Pitts into Motocalc (free for 30 days) and see what is recommended.

www.motocalc.com
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Old Apr 30, 2003, 09:36 AM
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Central Fla
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thanks fred i will try the motorcalc and see what it says.

wolfy
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Old Apr 30, 2003, 09:55 AM
310mph Kolibri T25 Swist
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Wolfy

Motocalc is good, but remember to ask before buying

motocalc numbers is´t always so easy to read out.

/Henke
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Old Apr 30, 2003, 09:59 AM
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Central Fla
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henket

what kind of amp draw will the motor give. i need more specs on the motor, speed control, gearbox setup plz. i also saw a b50 L series motor which carry more weight. can u help me on this motor setup plz.

wolfy
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Old Apr 30, 2003, 11:40 AM
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Wolfy

My guess is that the plane on 14cells will weigh 3,2kg

then find this in motocalc Hacker B50 11s 5,2:1 swinging a 13x6,5 APC prop constant and thrust constant.

also uncheck the filter check box


also in the battery box, click New and add

Sanyo HR2600
2750 mah 1,3v
0,004 Ohms
and 62g weight


at this "low" power level, only 800watts, the B50S is just fine, with a high eff.

you can also choose the 6.7:1 gearbox with a 15x7 prop....

it´s always better to go for big gearing and large prop!! this giver more thrust at a lower power input!

just make sure a 15" prop will not strike the ground :P


/Henke
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Old Apr 30, 2003, 11:44 AM
310mph Kolibri T25 Swist
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BTW,,,

I flew my Kyosho CAP from the beginning with 18cells 4,1KG weight!! flew great but FAST landings.... then changed gearing and battery to 12cells, now 3kg weight.

then I decided to rip the covering of and recover it, as I did that I also removed un nesissery weight, put in a B40 8L 4,4:1 pulling a 13x6,5 prop on 9x3000HV

now the all up weight is 2144g, and I got a flight time of 8min!!

really fun to fly! but I needed to make tha whole airplane lighter...

the pitts is probably a bit larger then the CAP, so I guess a B40L would´t handle the power...

I get well over 3kg thrust from the B40 too, but not for long term, only in bursts for steep climbing or hover.


/Henke
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Old Apr 30, 2003, 04:27 PM
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Central Fla
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hey

i was doing some engine shopping and was curious about an engine call mega L5. it states its equivalent to a .60 glow engine. anyone familiar with this motor? im still into the hacker b50 but doing the price affordability thing u know. with 3 kids its a little hard to drop a big lumpsome.

wolfy
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Old Apr 30, 2003, 05:00 PM
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Fallbrook, CA
Joined Oct 1998
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Wolfy,

I had a Mega S7 that I sold on E-Zone a while back. I had it in a high performance 40 size electric plane. Still have the plane. It flew on 16 cells, but with a high wing loading and low profile wing I had problems landing it. It would have been better using a S5 and 10~12 cells on the same prop (11 x 7 3/4).

Nowdays, I would not recommend any brushed motor. Even the Mega S/L series. You'd be better off with the equivilant brushless motor. Cost is quite similar. Especially when you consider the price of a high amp brushed ESC.

I have a Global Fokker D VII ARF I am going to make electric. I will use 16 cells with either the Mega 22/30/2 geared 2.5:1 or 22/30/3 geared 2:1 with a 14 x 9 prop. That should fly it very well. A similar setup using an Aveox motor did fly it well. You can read the review on the Hobby People web site.

Art
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Old Apr 30, 2003, 05:23 PM
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Wolfy, just for info we use Motors, not engines. (engines are those messy IC things)

You have to be carefull with manufacturer specs. Some are right on, and some can be elaborated.

Same goes for what we say here , some is right on and some is overzelous
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Old Apr 30, 2003, 06:06 PM
310mph Kolibri T25 Swist
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Sverige, Kronobergs Län, Ljungby
Joined Jan 2001
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Hi again

I had a S9 in my CAP (same Mega motor but diffrent wind)

18cells... less power on 18cellt then a B50 on 14

I know a B50 is lot´s of money, but you should stay brushless any how...

/Henke
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