simonfly

I have built Katana MD by Precision Aerobatics with OS 30 4 stroke. It flies very well for 15 minutes at least. (fuel tank 6 ounces)

Please, could you tell me the best propeller for this engine?

Thanks a lot

Daniel Z

how much does it weight? power is enough?

Prop 10x4 9x6

Ernie Misner

Do they still make that plane? Kit or ARF? do you have a link?

thanks,

Ernie

simonfly

The model weighs around 1200 grams (42.32 ounces) and the power is very good with 11x4 propeller. But I want to try other propellers.

At this link: http://www.allerc.com/Pictures/SU31-...Label-1200.jpg
you may see electric plane Hyperion Sukhoi. It weighs 1180 grams and is a little smaller than Katana MD.

1200 grams are a good weight in windy days. 117 cm x 114 cm and 1200 grams are a good dimension and a good weight to take advantage of aerodynamic forces.

This micro model (wingspan 40 cm - weight 25 grams) instead can't take advantage of aerodynamic forces.



The requested link is: precisionaerobatics.com

simonfly

After 5 minutes electric planes []

I don't like them. Too short fun.

Without noise they are more dangerous.

simonfly

But I also have a little electric plane: E- FLITE CAP 232 BP ARF



With two Hyperion Batteries 1600 mAh in series you can enjoy for more than ten minutes.

This model is a blast

But then I like electric planes YES

simonfly

Why is nobody interested in my glow conversion?

Are you all electric flyers only?[]

wyo69cowboy

My Feedback: (2)

I think it sounds pretty neat; post us some pics or a video. Would love to hear it!

WMB

My Feedback: (1)

I'd like to see a picture of the engine mounting on this. Sounds like a good combo!

kerwin50

simonfly we are very interested we'd love to see some pic's.
I've often thought about glow conversion on the PA aircraft they are good looking planes

simonfly

Some pics of my wonderfull plane

1.bp.blogspot.com/_83Xt7V5Ohpk/TMSBafrZlVI/AAAAAAAAABI/5qUgtBm6RKQ/s1600/IMG_0756.jpg

1.bp.blogspot.com/_83Xt7V5Ohpk/TMSCLyLjADI/AAAAAAAAABQ/E85zrRWTgFc/s1600/IMG_0758.jpg

3.bp.blogspot.com/_83Xt7V5Ohpk/TMSCbckHXsI/AAAAAAAAABY/dzdApVbn0JU/s1600/IMG_0759.jpg

4.bp.blogspot.com/_83Xt7V5Ohpk/TMSCnX1MDDI/AAAAAAAAABg/U3iOo0Jjeu4/s1600/IMG_0760.jpg



<meta content="text/html; charset=utf-8" http-equiv="CONTENT-TYPE" /><title></title><meta content="OpenOffice.org 3.2 (Win32)" name="GENERATOR" /><style type="text/css"> </style>

simonfly

Have you seen the pics?

What do you think about?

wyo69cowboy

My Feedback: (2)

Looks good. How did it turn out for weight compared to the electric setup? Did ya try any different props yet? Keep us posted...

kerwin50

Does she 3d
Sure seems cheaper than going electric
I've wondered how an os 25 would power it

simonfly

The best propeller is APC 11 x 5

Fuel: 20% nitro, 20% synthetic lubricant , 60% methyl alcohol

With OS engine it weighs 1200 grams.

As I have installed engine closer to firewall than electric motor, does the center of gravity move backward? How can I see if the CG is in the right position?

Thank you

Simonfly

kerwin50

What OS engine?
I'm sure alot of guys would love to see this thread in the electric to glow conversion.
I just accidently discovered your thread

simonfly

I have a problem: when the engine stops in flight, the model goes down vertical fastly like a brick.

kerwin50

Are you nose heavy.
But why does the motor quit in flight.
need more info

simonfly

I lost idle screw and spring.

The plane should not be nose heavy because, when I fly inverted, it climbs up.

The model is too nervous.

It's too exhausting to fly it.

Simonfly