Will this fly?

[dogeater]

Weight - 4.5 lbs (as of right now, will probably go up to around 6 lbs once finished)
Body length - 40 inches
Body width - 5 inches
Body height - 6 inches
Back wing span - 10 inches each
Back wing chord - 7 inches
Front wing span - 60 inches
Front wing chord - 8 inches
Engines - 4x A2212 2200kv brushless motors with 30 amp ESCs
Battery - 2200mAh 50C 11.1v 3s LiPo battery

 

[bisco]

give her a toss and see if she glides

 

[Merv]

With enough power you can make a brick fly.

A wing of 60x8 is 3.33 square feet (60x8=480 480÷144=3.33). A all up weight of 6 pounds is 96 oz. Giving a wing loading of 28.8 oz/sqft (96÷3.33=28.8).

To fly well you need a wing loading of 12-15 oz/sqft.

 

[L Edge]

If the wing doesn't fold.
If the fuse doesn't fold or crumple.
If enough thrust.
Has a working large rudder or differential thrust.

 

[dogeater]

With enough power you can make a brick fly.

A wing of 60x8 is 3.33 square feet (60x8=480 480÷144=3.33). A all up weight of 6 pounds is 96 oz. Giving a wing loading of 28.8 oz/sqft (96÷3.33=28.8).

To fly well you need a wing loading of 12-15 oz/sqft.

Should I extend the wings or the chord?

 

[Merv]

Should I extend the wings or the chord?

Likely some of both. Extending the wing span a lot is likely going to require a decent spar. I would put more emphasis on the cord.

I would put far more emphasis on reducing weight. My FT planes are around 30 oz & not that much smaller, a 40-50 inch wing span.

 

[dogeater]

Likely some of both. Extending the wing span a lot is likely going to require a decent spar. I would put more emphasis on the cord.

I would put far more emphasis on reducing weight. My FT planes are around 30 oz & not that much smaller, a 40-50 inch wing span.

I dont know where all the weight is coming from. The plane weights 4.4 lbs with only the battery and the 4 motors w/ its escs on it

 

[dogeater]

I dont know where all the weight is coming from. The plane weights 4.4 lbs with only the battery and the 4 motors w/ its escs on it

The motors and batteries combined weigh 20 oz, the rest of the weight is just foam (50 oz)

 

[Merv]

The motors and batteries combined weigh 20 oz, the rest of the weight is just foam (50 oz)

Wow, that is a beast of battery & motors. 50 oz of foam, that is like 10 sheets.
How much hot glue? Hot glue is heavy, you must use it sparingly. My goal is 1 full size stick of glue for a normal size FT plane.

 

[dogeater]

Wow, that is a beast of battery & motors. 50 oz of foam, that is like 10 sheets.
How much hot glue? Hot glue is heavy, you must use it sparingly. My goal is 1 full size stick of glue for a normal size FT plane.

Oh uhhhh I might have used a lot of hot glue

 

[dogeater]

Wow, that is a beast of battery & motors. 50 oz of foam, that is like 10 sheets.
How much hot glue? Hot glue is heavy, you must use it sparingly. My goal is 1 full size stick of glue for a normal size FT plane.

Now that I think about it, I might try skeletonizing the plane if it doesnt take off. The foam I am using seems unnaturally heavy

 

[Merv]

...The foam I am using seems unnaturally heavy

A 20x30 sheet of dollar tree foamboard weighs about 4 oz. Other brands, like Elmer's, weigh significant more. You can easily tell the difference by holding a sheet of each in your hand.

 

[dogeater]

A 20x30 sheet of dollar tree foamboard weighs about 4 oz. Other brands, like Elmer's, weigh significant more. You can easily tell the difference by holding a sheet of each in your hand.

I got some from hobby lobby (20" x 30" Weighing about 10 oz)

 

[Merv]

I got some from hobby lobby (20" x 30" Weighing about 10 oz)

Well that accounts for quite a bit of excess weight.

Walmart has a pen & gear brand of foamboard that is slightly heavier than dollar tree. But DTFB is still my favorite.