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Aug 31, 2012, 02:52 PM
Team Aztech Aeromodels!
zmonster97's Avatar
Quote:
Originally Posted by annarelli
Hobby People have the Fun Cub on sale for $90 for the next few days.

Grampa Tony
Well, now they're out of stock.
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Aug 31, 2012, 05:44 PM
Registered User
shadow102's Avatar
first time on the water





Aug 31, 2012, 06:02 PM
Registered User
pootman's Avatar
Here's a onboard gopro vid of us flying at the bluffs near my house yesterday. It was during sunset and I was worried that the gopro vid wouldn't turn out due to the low light. To my surprise it wasn't bad.

Funcub Sunset Flight Ellwood Bluffs Aug 30, 2012 (7 min 22 sec)


pootman
Aug 31, 2012, 09:20 PM
It Flys Me
aldalo's Avatar

Flaps


I'm trying to setup flaps on a funcub using a y harness but the servos aren't in sync.
Anyone no how to fix this ?

Thanks Alan
Aug 31, 2012, 09:55 PM
Registered User
Quote:
Originally Posted by aldalo
I'm trying to setup flaps on a funcub using a y harness but the servos aren't in sync.
Anyone no how to fix this ?

Thanks Alan
What do you mean by "in sync"? If you mean they move in opposite directions, there have been several recent posts on the topic.

In summary there are several solutions.
1. Buy a reversing Y harness.
2. Connect one servo to another channel and mix the flap channel to it.
3. Flip one servo over - requires cutting foam.
Aug 31, 2012, 09:55 PM
There is Victory in the Lord!
knifeedge63's Avatar
Quote:
Originally Posted by aldalo
I'm trying to setup flaps on a funcub using a y harness but the servos aren't in sync.
Anyone no how to fix this ?

Thanks Alan
Common problem. Either do a two servo setup with your radio, or cut extra space out on one servo slot so you can rotate the servo around 180 degrees so that the face of the servo points the other way.
Aug 31, 2012, 10:09 PM
It Flys Me
aldalo's Avatar
Quote:
Originally Posted by knifeedge63
Common problem. Either do a two servo setup with your radio, or cut extra space out on one servo slot so you can rotate the servo around 180 degrees so that the face of the servo points the other way.
Thanks
Sep 01, 2012, 07:36 AM
An unexpected error occurred
Phaedra's Avatar
Quote:
Originally Posted by annarelli
When I got my pilot's license many years ago we were taught that at low speeds ailerons become ineffective. Use rudder instead. I assume the same applies for models.

Grampa Tony
It's not just that they become ineffective, you get a high risk of tip stall and even worse, a spin.
That's how I learned it, and it gets even more pronounced when you do power-on, full flaps stalls : that wing drops so fast, you really don't want that to happen at low altitude.
And of course, models are subject to the same aerodynamics, with a scale effect to it (reynolds numbers and stuff).

Conclusion remains : use rudder, no ailerons, at low speed and hi alpha.
Sep 01, 2012, 07:49 AM
Registered User
shadow102's Avatar
only thing you use the ailerons for in low speed high alpha is for flat turns you feed in some opposite aileron so you dont dip and stall the inside wing.
Sep 01, 2012, 08:15 AM
Registered User
ilium007's Avatar
OMG - 833 pages !!!! Where does one even begin to find motor prop combos !!
Sep 01, 2012, 08:17 AM
Registered User
shadow102's Avatar
Quote:
Originally Posted by ilium007
OMG - 833 pages !!!! Where does one even begin to find motor prop combos !!
whatever you can fit? seems to be the general idea.
Sep 01, 2012, 08:19 AM
Registered User
ilium007's Avatar
Hahahaah - I just remembered that I bought a smallpartscnc mount for this plane in anticipation of buying one. I remember they have compatible motors listed on their website. I'll start there !
Sep 01, 2012, 12:21 PM
Registered User
Taildragger55's Avatar
Quote:
Originally Posted by ilium007
OMG - 833 pages !!!! Where does one even begin to find motor prop combos !!
Shoot for 100 to 125 watts per lb. 300+ watts is about right.
Sep 01, 2012, 09:54 PM
Wada ya mean, over engineered?
cubcrafter60's Avatar
Quote:
Originally Posted by dome78
I have now about 15 flights on the FC with the slats. It seems they actually do reduce the stall speed a bit. She will come in at more of an angle making a tail wheel first landing possible. However the ailerons barely work at those speeds and I am yanking the sticks to keep her level fighting dropping wings left and right - most times she will wobble about somewhat inelegantly. Probably it would have been better to move the slats to the outer section of the wing.

I am wondering if some may have experimented in making the FC even slower? My slat design yielded mixed results but I feel like using my aging FC as a testbed for servo operated spoilers/Kruger flaps/droops or speed brakes on the fuse. Anybody can share their experience?

P.s. Robin, the slats are sheets of balsa molded on the wing profile and then reinforced with "cross" ribs. I have pictures in my blog.
Dome78 - Nice job, and I enjoyed the conclusion of your RC video techniques post also! Andy Lennon who designed several aerodynamically advanced models wrote a book titled "Basics of RC Model aircraft design" there’s an entire chapter (chap. 20) devoted to High Lift Devices & weight reduction, anyone who may be considering playing with HLD's might find it useful, It may still be available through Model Airplane News.
I imagine with the way things are going its just a matter of time before we see Vortex Generators on a FunCub! ~ Robin

PS - The Air Age Publishing store is out of stock on the book but I found used copies on Amazon http://www.amazon.com/Basics-Model-A...ircraft+design You may want to search a bit you may find a better deal.
Last edited by cubcrafter60; Sep 01, 2012 at 11:10 PM. Reason: Added PS
Sep 02, 2012, 04:23 AM
Agricultural flyer
mixer421's Avatar
Quote:
Originally Posted by ilium007
OMG - 833 pages !!!! Where does one even begin to find motor prop combos !!
This is a good place to look.
http://www.peakeff.com/beta/Default.aspx


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