Help! Using a 80 mm edf

[LUMBERCAVER]

Im trying to find something to use my 80 mm edf for! Ive had it for months and i cant find any foam board plans or anything do you think oi could fi tit into one of the ft 70 kits?

 

[dberg97]

Up-scale the Viggen plans. I've built 70mm (normal scale), 80mm (150% scale), and twin 70mm (200% scale versions). Here's my 80mm version that I put thrust vectoring in. Without the vectoring, you will save weight and it should fly very well.

150% Scale, 80mm Viggen

Viggen Plans

 

[FlyingWithRyan]

Im trying to find something to use my 80 mm edf for! Ive had it for months and i cant find any foam board plans or anything do you think oi could fi tit into one of the ft 70 kits?

Up-scale the Viggen plans. I've built 70mm (normal scale), 80mm (150% scale), and twin 70mm (200% scale versions). Here's my 80mm version that I put thrust vectoring in. Without the vectoring, you will save weight and it should fly very well.

150% Scale, 80mm Viggen

Viggen Plans

did you beef up the wing in the 150%? I know Grifflyer's L39 would fold the wing being enlarged but thats also built for a 50mm.

 

[dberg97]

I doubled the wing thickness and added two parallel carbon spars that each ran the width of the wing spaced about 1/3 and 2/3 root chord distance. Since I had functioning canards, they are also doubled and so is the vertical stabilizer.

 

[dberg97]

Increasing the Viggen's size makes it a much more stable platform.

 

[dberg97]

Funny you mention the L39. I just built one this weekend.

 

[FlyingWithRyan]

Funny you mention the L39. I just built one this weekend.

What size?

 

[LUMBERCAVER]

did you beef up the wing in the 150%? I know Grifflyer's L39 would fold the wing being enlarged but thats also built for a 50mm.

how would i scale the pans? i have never made a foam plane

 

[LUMBERCAVER]

Up-scale the Viggen plans. I've built 70mm (normal scale), 80mm (150% scale), and twin 70mm (200% scale versions). Here's my 80mm version that I put thrust vectoring in. Without the vectoring, you will save weight and it should fly very well.

150% Scale, 80mm Viggen

Viggen Plans

how do i scale it

 

[FlyingWithRyan]

how would i scale the pans? i have never made a foam plane

I wouldn't start with the viggen if you've never built a foam plane. Perhaps the grunjet

 

[FlyingWithRyan]

but you can change the scale in adobe acrobat software

 

[LUMBERCAVER]

what is the grunjet?

 

[dberg97]

What size?

Normal scale. I had a 50mm lying around.

 

[dberg97]

but you can change the scale in adobe acrobat software

how do i scale it

In the print settings of Adobe switch to poster printing and increase the scale to desired size.

 

[dberg97]

I wouldn't start with the viggen if you've never built a foam plane. Perhaps the grunjet

If you haven’t built a foamie, I’d agree that you may not want to start with an EDF foamie at all. While the up-scaled Viggen is more forgiving than most EDF builds, it isn’t a good starting build. Start with a prop driver. I like the scout.

 

[FlyingWithRyan]

what is the grunjet?

Search it in the forums here. The EDF is mounted on top of a very basic fuselage and wing. If you're going to an 80mm Id recommend beefing up the wing though.