toddh

My Feedback: (6)

I have a funtana 40 that I would like to make electric power but I want to be able to 3d with it.w
hat motor, prop, batt. combo should I use??



Todd

philpop

do a search at rcgroups.com, been done plenty of times

GoodTill

This is pretty much the standard conversion for the Funtana 40.

C50 10L acro
5S lithium
18/10 APC prop

You will need to get taller gear to get enough clearance. The are available from a few suppliers. I had one from fiberlight that was carbon, but after a few hard landing it split. Now I have one from TNT landing products, it alum and I find it very nice be it a little heavier.

Mike

matteo

Would this work for a cheaper setup

AXI 4120
20 cell 2200

a bit heaver but I think that was a setup in a venus 40 and it had unlimited vertical!

Matteo

Henke Torphammar

I like light planes, lighter means less power for the same performance..

I would probably go with a C50S 6,7:1 18x10 or so. useing 5s2p. attacing on higher voltage instead of high amps.

matteo

WHat battery and Axi would be used on this plane, Hackers are to expensive for me!

Matteo

Henke Torphammar

I would rather save for a Hacker then buying a motor that "almost" works for my hard earned money... sure the Hackers cost more, but for this kind of plane it is like day and night.


it is a very big diffrence 3D:ing a plane with 1,2:1 or 2+:1 of power to weight ratio. an AXI would fly the plane well with strong verticals but it lacks the punch, sure you could pop in a larger AXI but then you are heavy...

"only" the Hackers put out 3kW on a motor weighing under 1lb.

matteo

Also by the stats I have noticed that the hackers run at a lower amp for more power, maby just me though. I am thinking of buying a hacker b20-26s for little 15oz floamys and my OLD 3s1p TP 2100's, sorry to get a bit off topic but it seems that Hanke knows what hes talking about, so will the lipos work with the motor?

thanks,
Matteo

Matt Kirsch

My Feedback: (21)

20 cells is too much to haul around with this plane for sure. For a 40-size conversion, you want to be in the 14-16 cell range, or 4S to 5S LiPoly in most cases.

The problem with the AXi conversion is not in the motor; it's in the battery. Hauling around 16 GP3300 NiMH cells, you're going to end up around 7-1/2 pounds with this plane. From personal experience at our electric fun fly today, I can say that the Funtana does fly well on a 4120/18 with a 14x10 prop on 16 cells, but as Henke alludes, it doesn't fly like a Funtana should. That is, 3D.

You can shave off some weight, at the cost of a few minutes' flight time, by going with HR4/5FAUP NiMH cells. LiPolys will increase the advantage further.

Henke Torphammar

hi

the Hackers are a bit diffrent from the outrunners as they put out so much power/weight they get hot faster as they have less cooling surface, so a 15oz foamie and 2100mAh cells would kill the motor.

I got mine in a 9,5oz depron plane (Mini funtana) useing kokam 3s 340SHD cells I get 6-7min of 3D flight, very powerful. Thunder Power is soon do deliver a cell at the same weight but 480mAh (vs kokam 300mAh). if building a heavier plane a AXI 22/12/34 on 3s2100 would be fine, back to "sportflying" but it won´t overheat and you can fly for close to an hour.

BTW, if you have more questins about this setups please search the 3D/parkflyer/foamies forums and post there.

matteo

So for the funtana with the axi, if 4s or 5s lipos are run, then it will fly like a funfly and not a rock. right?

Henke Torphammar

AXI + 5s2p TP 4000 and it will fly with good sport/aerobatic, will probably hover but not pull out very quick.

Greg Covey

I saw the Funtana 40 fly this weekend at a local electric show using an AXI 4130 and it was very impressive! I can't remember what Lithium configuration was being used but it was Irate or Tanic cells.

The guy came all the way from Amarillo, Texas to visit family in upstate, NY. I'm glad he brought his Funtana along...maybe he'll post here when he returns home.

matteo

"AXI 4130 Rated for a 15-16lbs airplane" or as i like to put it a 5-6lbs 3D plane. I love how overpowerd planes are so, well, overpowered

Henke Torphammar

only thing that bothers me is that the AXI 4130 is almost 1lb... an 1lb motor should fly a .90 Funtana imao

Greg Covey

Henke,

It's not your mind that is closed but rather your eyes.

Re-read the thread title.

Henke Torphammar

rgr

bigbobed

I'm the guy from Amarrillo"s father. He was using an AXI 4120/18 with 6s2p Irate 2200's. Funtana weighs 6-10 ready to fly.
My son says the plane would hover if he had the skill.
Greg, those were my pictures that you scanned for the club archives. Paul emailed them to me today.
Thanks,
Bob

rthorne

My Feedback: (29)

I just found this thread per my Dad, Bigbobed.

Heres the specifics on the plane:

AXI 4120-18
6S2P Irate 2200 packs. This gives me 25.2 volts (after charge) at 4400 mah
Phoenix 60 controller
1800 mah 6 cell nimh receiver pack (this battery probably could be smaller)
14 x 7 electric prop
Hitec 5475 servo's all around
Draws 47 to 50 amps at full throttle.

I get two 8 to 10 minute flights with plenty of reserve before charging. The most I've ever had to put back in the batteries after two flights is 3700 mah's.


This plane will go straight up. But I'm not sure if this power setup is the best for a serious 3d'r. Its plenty for me. Its tough to beat the price of a 4120-18 direct drive moter as compared to a geared Hacker. But then again this plane does every thing I want it to do but may not be enough to hover and be able to pull out.

Devin McGrath

any one else thinkig of trying to do an electric funtana 90 like i am it will be very expencive but posibly well worth it in the long run

StephenT

Guys


check out the article in Oct Fly RC for the Funtana Conversion