WOT 4 CofG and Throws
 

Hi. Just bought a second hand WOT 4 with no instructions and would like to know the point of CofG and the control throws. Any help greatly appreciated.

Thanks.

RE: WOT 4 CofG and Throws
 

WOT's a WOT 4?

What?

WOT's a WOT 4?

A what fer?

Ya, a WOT 4.

Well, what is a what fer?

That's what I said.

What?

No, WOT 4

What fer?

Ya.

Beats me.

RE: WOT 4 CofG and Throws
 

who's on first???





No answer from me, but the plane is here:

http://www.rcuniverse.com/product_gu...fm?kit_id=2932


With a straight wing like that... measure the wing, take 25% of that and measure that back from the leading edge... it will get you close..

as for throws....set it up with lots and use some expo... seriously, that is what I would do...

RE: WOT 4 CofG and Throws
 

Assuming you have the original type Wot4 with parallel chord wings ( not the new tapered wings ) the info from the original instructions is

C of G 3.5 inches back from leading edge plus or minus .25 inch (repeat three and half inches plus or minus one quarter inch )
Set up control movements as specified below using the lower limits initially
Aileron one quarter to three eighths inch up and down at TE

Elevator three eighths to five eighths inch up and down at widest point

Rudder one and three quarters ( 1.75 ) inch left and right at widest point

For the benefit of those who have not heard of the Wot4 its just about the best flying plane you can have. Its ideal for practising aerobatics as you can get away with errors better than a pattern model and it does just about anything. In a stiff breeze it will hover upright or inverted - great fun! Also it can be used on a wide range of engines so you can use it as an engine test model. It is a classic plane

Note the instructions say an optional three quarters inch dihedral under each tip for trainer only. Mine was built with a flat wing for aerobatic flying. I don’t think it would hover inverted with dihedral! Check this point on a secondhand model and only use a large engine if the tailplane has the spruce reinforcement.
.
Mine lasted for 554 flights before succumbing to oil soaked balsa syndrome. A great model.


Kits are still available from Chris Foss Designs [link=http://www.chrisfoss.co.uk]www.chrisfoss.co.uk[/link]

RE: WOT 4 CofG and Throws
 

Thanks for the information kdc. I have a OS 40LA engine fitted, what prop would be best suited for this aircraft?

Thanks,

Rob

RE: WOT 4 CofG and Throws
 

Most people will advise a 10 x 6 for a 40, but I always use an 11 x 7 Graupner on my 40's its quieter and pulls well. I found that on the older OS 40 FP that this prop gave almost as many revs as a 10 x 6 in all the engine tests in magazines and I have continued with an 11 x 7 on my Enya 40 SS and OS 40 FP and Irvine 40.
There should be plenty of ground clearance with a Wot 4.
What club do you fly with?

RE: WOT 4 CofG and Throws
 

Thanks KDC. I currently don't fly at a club. My dad has a farm so hopefully will be flying the wot 4 from there in a couple of weeks. Cheers.

RE: WOT 4 CofG and Throws
 

This is an LA 40, not a powerfull BB type. A 10-6 is just about right on the money for that plane (an 11-7 is wildly too big to permit the engine to develop anything close to full power).

If you need more vertical, an APC 11-4 works well with the LA 40, but it will cut top speed.

If you want a bit more top speed, either a 9-7 or 10-7 will work reasonably well, but both will cut acceleration & climb (the 9-7 will give abit more speed & the 10-7 a little more climb).

Best choice --- 10-6.

RE: WOT 4 CofG and Throws
 

Do not attempt to fly a Wot4 unless you are an experienced RC flier.....you are sure to crash and maybe injure someone. Join a club and make sure you are insured.
Joining a club and rceiving training is much cheaper than crashing. I do not know anyone who has succeeded flying a modern RC plane without assistance of a competant pilot....but I know many who tried and crashed. Eventually they joined a club and most became competant fliers.

The WOT4 is not a trainer unless it has dihedral and most are built without dihedral.
Believe me an 11 x 7 is a good prop for sports flying on a plain bearing 40.
See my club site for basic info for newcomers in my area.[link=http://www.dagenham.inspiron.co.uk/index.htm]www.dagenham.inspiron.co.uk/index.htm [/link]
also [link=http://www.bmfa.org.uk]www.bmfa.org.uk [/link] to find your nearest club. It will not cost you anything to just visit a club to chat with the members and ask for advice.