Ft viggen group build!
- Thread starter The Hangar
- Start date
BATTLEAXE
Legendary member
The aluminum thrust tube will help with balooning i am guessing.
Headbang
Master member
Yes, and lighter then plastic or card stock
BATTLEAXE
Legendary member
You should have been an engineer lol
HilldaFlyer
Well-known member
This winter I think I'll rebuild the Viggen. I've been wanting to create foiled wings with a decent spar, but if that were cut into the fuselage, it would obstruct the intake. So I like the ideas in this thread of cutting out the top wing panel, but then the spar wouldn't go all the way through. The fuselage would then have to "replace" the top wing spar - which might work. The build would have complete fiberglass skin.
Here is what happens when you use a 4S 70 mm EDF on 6S.
Here is what happens when you use a 4S 70 mm EDF on 6S.
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Headbang
Master member
It was more then enough, only running a 30amp esc so 4s would be pushing it at 31-32amps. It is tempting tho, that little 30amp esc is right in the middle of the air flow through the fuse.
buzzbomb
I know nothing!
Homey
Elite member
Hi all,
I'm too lazy to check the entire thread, so forgive me if this has been covered.
I've built my Viggen with a cheapo 70mm edf that has good reviews, but may be a tad heavy! I had to add 105 grams so I wouldn't have the battery in the nose. Has anyone else experienced this?
Peter
I'm too lazy to check the entire thread, so forgive me if this has been covered.
I've built my Viggen with a cheapo 70mm edf that has good reviews, but may be a tad heavy! I had to add 105 grams so I wouldn't have the battery in the nose. Has anyone else experienced this?
Peter
I’m doing a pusher prop version for my viggen, so I don’t know about the 70mm edf, but I think you do have to place the battery pretty far forward to get it to balance. @jpot1 said that the smaller motor would make balancing easier, so I’m guessing that viggens usually tail heavy, but I guess I’ll find out when I build mine... two motors would would be twice the weight in the back, so maybe I should just stick with my original plan as a b or c pack pusher for right now. So many options...
Headbang
Master member
Funny thing is an 1808 will need a smaller battery, making everything lighter. I think it would work. Build with lighter glues and you might have a winner.
I think the b and c pack motors are the wrong fit, the viggen is much better off with a high kv motor and smaller prop.
Hmm, so a 1808 instead of a b or c pack? I think I’ll give that a shot. Maybe the twin will be a future project then. So a smaller battery like a 1000 mah 3s?
As far as lighter glue, hot glue is the only stuff I’ve used. If I go really light on it like only filling creases with a dab in several spots and stuff like that will that work? If not, what kind of gorilla glue or whatever will I need? Also, how long should I wait between steps?
Headbang
Master member
800mAh is a good fit.
As far as glue... I use "white gorilla glue" all the time. Expands less then the yellow stuff, and cures in half the time. Do not confuse it with clear, clear does not expand at all.
Notice in the background the steal bars and stuff weighting a part down that is curing. 9ah sealed gel cell ups batteries are amazing for holding things together. Bottles of water work well. Tape. 2x4's What ever is heavy and handy. A misting spray bottle with water is handy to lightly mist one side of the part to speed activation of the glue.
I’ll see about getting a 800 mah 3s. The thing I like about the 1000 mah 3s looks I get is that they fly pretty much any of my airplanes - a little on the big side for the minis and definitely on the lower side for the scout and cub kinds of things... But it works for all of them! So fill the crack with glue and then give it a light mist, then close it and “clamp” it? Does he water warp the foam at all?
jpot1
Elite member
The last time I built a viggen I used a 2200kv motor swinging a 6x4 prop. Even with the servos forward I ended up needing a 3s 2200 to balance and I had to cut a hole into the nose so the battery could stick further forward than under the canopy area. Perhaps I just built heavy with too much hot glue. @The Hangar I would not run and go buy a battery until you build this. I think the 1000 3s will be fine. Just my $0.02.
Headbang
Master member
Give one side a light mist, or in the case of folds do not mist. Depends on humidity, here in the winter at -30C there is none, so I have to mist parts. This summer it has not stopped raining, I have not been misting parts at all since the humidity is so high.
Got some gorilla glue and my viggen project is officially underway!
Headbang
Master member
Mine is officially stalled lol
BATTLEAXE
Legendary member
Something wrong with the Iced tea can thrust hectoring plan?
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