I don’t know if the plane I built will fly.

[Chillpill77]

I built a flying wing plane weighing 245 grams with the battery. It uses a 2200kv motor, has an 5x4.5 tri prop, and a 850mah 3s battery. Does anyone know if it will be able to fly?

 

[LitterBug]

Give it a try and let us know!

 

[Mr Man]

It’ll need a lot of speed to keep it in the air, and I hope you get CG correct, because that’s the most important thing. 👍👍👍

 

[bisco]

if you throw it, it will definitely fly for a few yards at least, all the best!

 

[LitterBug]

The control horn geometry on the elevons is kind of backwards.. The connecting point should be over the hinge, not the back of the control surface. This may limit the usable deflection of the elevons, espescially when moving down.

 

[Chillpill77]

It’ll need a lot of speed to keep it in the air, and I hope you get CG correct, because that’s the most important thing. 👍👍👍

How far back should the cg be?

 

[Chillpill77]

The control horn geometry on the elevons is kind of backwards.. The connecting point should be over the hinge, not the back of the control surface. This may limit the usable deflection of the elevons, espescially when moving down.

How can I fix that?

 

[Chillpill77]

if you throw it, it will definitely fly for a few yards at least, all the best!

Is there a way to make sure that it will be able to stay in the air as long as there is still battery left?

 

[LitterBug]

How can I fix that?

The holes in the control horns should be above the hinge when the control surface is in the flat/neutral position.

 

[Houndpup Rc]

Is there a way to make sure that it will be able to stay in the air as long as there is still battery left?

He was just joking that it it fly as long as it's in the air after you throw it...

 

[Houndpup Rc]

How far back should the cg be?

I am guessing it will be about here...

 

[Chillpill77]

I am guessing it will be about here...
View attachment 252828

It seems that my cg is an inch too far back. How can I move it forward

 

[Chillpill77]

View attachment 252827
The holes in the control horns should be above the hinge when the control surface is in the flat/neutral position.

Thanks

 

[AIRFORGE]

It seems that my cg is an inch too far back. How can I move it forward

Try these a little at a time:
Move the battery more to the front, if possible.
Reposition the ESC and /or RX toward the front.
Add weight to the front. Washers, coins, lead, hot glue, etc.
You could try removing a small amount of foam from the back of the control surfaces to remove rear weight.

 

[Chillpill77]

View attachment 252827
The holes in the control horns should be above the hinge when the control surface is in the flat/neutral position.

Try these a little at a time:
Move the battery more to the front, if possible.
Reposition the ESC and /or RX toward the front.
Add weight to the front. Washers, coins, lead, hot glue, etc.
You could try removing a small amount of foam from the back of the control surfaces to remove rear weight.

Will it be too heavy if I put weight in the front? (I already moved the ESC and the RX in the front

 

[Houndpup Rc]

Will it be too heavy if I put weight in the front? (I already moved the ESC and the RX in the front

Do you have the battery all the way up in the front?

 

[Chillpill77]

yes it. is all the way in the front

 

[Chillpill77]

but the esc and rx are not all the way, ut are still. in the front

 

[Houndpup Rc]

but the esc and rx are not all the way, ut are still. in the front

I wouldn't add any more weight....Maybe just get it as close as you can and try it..Or get a lighter motor like this: https://www.getfpv.com/emax-e3-seri...?afid=LyujPEurbgACGxPz&referring_service=link

 

[Chillpill77]

thanks