68" Extra 300 with Moki 1.35: is that too much of power for pattern flying?  
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All Forums >> RC Airplanes >> Pattern Flying >> 68" Extra 300 with Moki 1.35: is that too much of power for pattern flying?
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68" Extra 300 with Moki 1.35: is that too much of ... - 3/26/2003 12:40:06 AM   
Zaquron


 

Posts: 54
Joined: 3/12/2003
From: ., HUNGARY
Status: offline 		I am just about to finish my 68" Extra 300 which will weigh about 9lbs or a lil' less.
What do you people thinkof it? Isn't it too much power for a model that size? I'm a little worried about the excessive torque. Wouldn't it affect the low speed behaviour of the plane?

Zaquron
       Post #: 1

You should be OK - 3/26/2003 2:49:10 AM   
MarkNovack



Posts: 1546
Joined: 2/9/2002
From: Nameche, BELGIUM
Status: offline 		I don't know the structure of your airplane, but at 9lbs you will have a well overpowered airplane. However, I do not think you will be dangeroulsy overpowered. Just going by C.C.s, the 1.35 is probably optimal for airplanes between 9.5-10.5 pounds where the goal is unlimited performance.

In this size to CC ratio, it depends mostly upon achieving a good balance without lots of extra weight in the tail.

As far as flying pattern, I don't know of any pattern pilots complaining about too much power. Swinging a larger propellor will help for aerodynamic braking when pulled to idle, and it's always nice to have some more throttle at the top if you want to go up faster.

Mark

(in reply to Zaquron)
       Post #: 2

68" Extra 300 with Moki 1.35: is that too much of ... - 3/26/2003 4:14:34 PM   
walshy


 

Posts: 24
Joined: 3/24/2003
From: Bundaberg, AUSTRALIA
Status: offline 		Hey no worries Zaquron, I have a 66inch composite extra 300, 4.7 kilo. with a OS 160 fx swinging 14x10 wood @8 K. I will be useing it at my next comp in Expert. (It is only 5 flights old). It handles the shedule easily except it is a little short and as such does not dampen out yaw adjustments as well as a regular pattern ship. The greatest friend you can ever have in pattern is heaps and heaps of power, it helps you to fly the pattern larger and slower this gives you time to position your craft for the next manouver and give you time to hide and fix your mistakes with out the judges noticing so much.... Me I would use a 180 moki ... I,m serious.

(in reply to Zaquron)
       Post #: 3

68" Extra 300 with Moki 1.35: is that too much of ... - 3/26/2003 8:25:07 PM   
Brian Dorff


 

Posts: 349
Joined: 11/27/2002
From: Grand Forks, ND, USA
Status: offline 		My 11.25 lb Cap has a Moki 1.35 in it, and it has unlimited vert, hovers about 1/2-2/3 throttle. My Goldberg extra (68", 8.25 lbs) could have used a bit more than the ST 90 that it had, but not that much. My prop on the cap is a 17x6 I t is the best I have found for the moki- both the APC 17x8 and 17x6 are good props for aerobatics

GET STRONG SERVOS!!!!!!!!!!!!!!!!

_____________________________

Brian Dorff, CD
Grand Forks, North Dakota- where time stands still but the air is always moving

(in reply to Zaquron)
       Post #: 4

68" Extra 300 with Moki 1.35: is that too much of ... - 3/26/2003 11:19:35 PM   
Zaquron


 

Posts: 54
Joined: 3/12/2003
From: ., HUNGARY
Status: offline 		thanks for the info guys!

I think my prop will be a 16*8 MenzS clone made of carbon.
According to my measurements it will turn at 9300 +/-100 generating more then enough pull on the nose of the bird.
About the servos i'm not worried at all... i use Dymond 6500s on the ailerons, 2 piece of 45Ncm servos on the elevator and one for the rudder.

(in reply to Zaquron)
       Post #: 5

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All Forums >> RC Airplanes >> Pattern Flying >> 68" Extra 300 with Moki 1.35: is that too much of power for pattern flying?
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