Here is my version of a FunBat. A very good flying model with low wingloading and excellent low speed characteristics.

Spec's;
Wingspan - 32"
Airfoil - KFm2
Motor - Bue Wonder 1700 Kv 24g to 2208-12 1800 Kv 39g unit
Prop - 7X6
ESC - 10-15A unit
Servo - Two 9g units
AUW - 7.9 oz
Battery - 850 mAh 2s

Attached are the .cnc and .skp files along with some pics Attached files FunBat with access slot.cnc (40.3 KB)Â FunBat.skp (2.1 MB)Â

 

Thanks Ken!

Before I built my PP the Funbat was a popular fast scratch build in my circle of RCfliers. Can't wait to pop one off the PP. It is a very fun plane.

 

Here are some build sequence photos.

Attached files

 

Thanks Blind Flight!

I was able to put the Rx and ESC behind the firewall, and the battery sat right on the CG.

 

It has very nice manners, but never tried AP with it. Also tried a model called the F&F (Fast & Furious), not sure it really lives up to that name. So between these two models I developed my own combat wing that has both of these beat hands down. Not sure I am ready to post the files here yet but here is a glimpse. Here is the current build thread with plans http://www.rcgroups.com/forums/showthread.php?t=1542672 Attached files

 

I built one of these last week... really like the way the the cuts went.. Saved the templates.. but I got my phlatprinter yesterday... Any chances of some cut files for the stingray?

 

Yes, very similar to the Alula. Am also working on a sloper version of the StingRay. I believe the Funbat is a bit draggy for a good sloper though.

 

Has anyone else cut one of these out? I just cut one out with my MK3 and the main wing section was skewed off center a little bit... Quite possibly user error... But if it is... I cannot see it.

JJ

 

my funbat came out perfect. I did hit the hinge sections with a corner of foam sanding block to get a nice hinge as there was a little material left to sand away...

still top of my favorite for a fast build and great flier

 

OK... I will recalibrate it and try it again tomorrow... this plane was one of my favorites to build when i was hand cutting foam.... that and Leadfeathers Yak

 

Ken, in the pictures it looks like you are using FFF ,which is about 1/4", but in the plan the slots are 0.200" and in the parameter box you've put material thickness as 0.210". Is that on purpose?

 

All intentional!

I make my slots on the snug side. This means less glue is required making joints easier to sand and or clean up. Since I have rarely found FFF to actually be .25" in thickness, and usually closer to .21" down to .2" I model for the minimum thickness. It is a whole lot easier to take material away than to add it on. The .21" in the parameter box makes sure I get through the thicker areas of foam, but not cut through my control surface hinge lines.

There is some method to my madness, or is that the other way around? LOL

 

Here is my latest Bat with colored packing tape applied by My NON colorblind Honey...30 foot streamer for combat from Dollar Tree


edit: Sorry it was a little blurry Attached files