Gliders > Combat

PSS-JET T1000

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IceWind:
Hi Brian,

Thanks for the details, i just wanted to see what method/values you were using.
To try and figure how the T1000 designer comes up with the 110mm value, as from the calculations i made and i was using 33% i didn't get that value.

Fred, thanks for the excellent graphical explanation.
When it comes to online CG calculators i usually use this one:
 http://www.blueskyrc.com/cg/index.php

But there are many more.

For the next fly I'm going to keep along those lines using 30% to 33% and see how it fly.

Also the T1000 is made of EPP and what i noticed is that the body bends easily, could this make any influence while flying?
Because if it bends during flight the angle between the tail and the main wing is going to be different.
Not used to these full EPP planes so not sure if this can be a problem.

Thanks.

Fred:
Hi Fernando,

Well, if the tail keep moving up and down, that will definitively change the way the glider is flying. (incidence change).

Might worth to put a carbon tube underneath the fuselage  :?:

By the way, talking about the CG, the CG depend also of the tail incidence. Change the tail incidence, you will need to change the CG, and that's something lots of people forget when looking for the perfect CG (alright, on a sport model, you will barely see the difference anyway !), and of course, of the profile used (for the cg range).

IceWind:
Hi Fred,

When i noticed that behavior i thought in that, insert a CF tube along the fuse to prevent it. It's also tricky to identify the tail incidence because of this.

Fred:
I have an incidencemeter... I can bring it to check the next time we fly together.
But no worries, I'm sure the bottom of the fuselage is flat ? Keep it flat when you put the tube, and that should be enough.

IceWind:
Thanks for the help Fred.

To help things out the bottom of the fuse is not straight, i wish i had photos to put here to show I'll try and get some.

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