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Author Topic: Air One Mini Acacia  (Read 2659 times)

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Offline Butzi

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Air One Mini Acacia
« on: April 26, 2017, 15:56:04 PM »
A question for the learned throng: I've recently purchased a brand new Mini Acacia (cruciform, all moving tail version) and I'm pondering over the CG position. My initial thought, given the wing platform, is to place it at the back face of the wing spar. If anyone has an actual proven measurement I'd be very grateful for the info.
BTW, anyone want to swap some blue servo covers for my red ones? The incorrect colour covers were inadvertently supplied so someone has probably got blue covers for their red wing.  ;D


Offline Butzi

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Re: Air One Mini Acacia
« Reply #1 on: April 28, 2017, 08:02:36 AM »
Nobody?  $%&
C'mon, someone on this forum must have owned/flown/crashed one of these. I only want a pointer in the right direction for the CG, not a pint of your blood!   ;D

Offline russd

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Re: Air One Mini Acacia
« Reply #2 on: April 28, 2017, 15:30:08 PM »
Hi, quick search on rcg says 73 mm from leading edge, quite a lot of info about these on rcg.

russ
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Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #3 on: April 28, 2017, 18:20:42 PM »
I've also just acquired one from T9, having always regretted selling my 4 servo wing version, now I've got a 2 servo wing type and am looking forwards to getting this in the air, so this question is quite relevant to me too...
I'd be very interested in finding out what servos you're putting in yours?, it's a rather slim wing so I'm thinking 150's from Ripmax via PMP...
The wings have a very thin paint covering which I don't mind because I can see the spar showing, but there is some marking on the fuz just in front of the fin, looks like where it came out of the mouldy and has been poorly touched up.
However it's not going to affect the flying and I can always rub down, fill and repaint if I feel like it, it's a very strong fuz as I recall, not like some of these skinny types. Really looking forwards to kitting this out and getting it airborne...
I must get out more...

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #4 on: April 28, 2017, 18:22:05 PM »
Also, the AMT is a big step up from the previous elevator version...
I must get out more...


Offline Butzi

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Re: Air One Mini Acacia
« Reply #5 on: April 29, 2017, 11:35:15 AM »
Hi Russ, thanks for the info.  :af

BG, mine has similar marks on the fuselage in the same place, but it's no biggie for me considering the low cost of the kit and the fact it's just a light wind hack about model.

I tried SD-150 servos but they're simply too thick (and large) and put a bulge into the wing skin. I've since installed SD-100 servos as they're 1mm thinner and much smaller, and fit comfortably. I know they only have low torque, but it's not like they're having to move large heavy surfaces over a long travel. I'm using a small Sav÷x metal gear digital servo for the elevator and a 4 cell 1600mAh battery with a magnetic switch (from Hyperflight). I've had to put about 80g of lead up front and the only task left is to fit the canopy, but I'm still not sure how to attach it.  $%&
« Last Edit: April 29, 2017, 11:36:20 AM by Butzi »

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #6 on: April 29, 2017, 13:49:45 PM »
Canopy...easy fix...a length of piano wire slightly longer than the canopy.
Stick it to the middle of the canopy (inside) with a patch of glass cloth and epoxy so that a small amount of wire sticks out either end (front and back) of the underside of the canopy.
File a very small notch at the front and rear of the canopy hole so that the wire sits centrally and holds the canopy in place.
You then can slide the canopy into place and it is secured in place
« Last Edit: April 29, 2017, 15:42:21 PM by Bustergrunt »
I must get out more...


Offline Butzi

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Re: Air One Mini Acacia
« Reply #7 on: April 29, 2017, 15:24:54 PM »
Thanks BG,  I think I'll give that a try.  :af
So far the AUW with the CG set at 70mm, is 563g. I know it has 3 fewer servos than my old RCRCM Sunbird, but I just can't get over how much lighter it is!

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #8 on: April 29, 2017, 15:40:38 PM »
The AOMA has the best fuz at the tail....not skinny like my Sunbird had...
Nice and thick and strong yet still light
I must get out more...


Offline Butzi

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Re: Air One Mini Acacia
« Reply #9 on: April 29, 2017, 15:52:35 PM »
I'm not sure how far you're into the build BG, but I had to trim the aileron horns to allow enough 'up' movement.  I had set the hole in the horn exactly on the centre of the hinge line, but the forward edge of the horn was fouling on the wing's bottom surface (with only a few mm's of deflection), causing the skin to bulge.
Also, I've epoxied the aileron servo lead extensions into the fuselage wing root area and have loose leads from the wings.

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #10 on: April 29, 2017, 15:55:34 PM »
Not started yet but usually make my own horns from glassfibre board, just need to jave a look at the geometry to allow for best use of spoilerons
I must get out more...

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #11 on: April 29, 2017, 15:58:30 PM »
I may yet route the pushrod to the top surface of the aileron but we'll see...it will be more efficient geometrically and prevent any control surface slop...
I must get out more...

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #12 on: May 30, 2017, 21:51:16 PM »
All finished now just to balance and set the CG....nice....👍
I must get out more...

Offline Butzi

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Re: Air One Mini Acacia
« Reply #13 on: May 31, 2017, 15:52:05 PM »
I had to free up the aileron hinge lines as they were a bit tight causing the little SD100 servos to perspire a little at full travel (up). For the record I have 12mm up and 10mm down movement on the ailerons which feels about right (post test flight). It's a really relaxing and well harmonised plane to fly and works in the lightest of lift and so far I'm very chuffed with it.
I'll be interested to see what weight yours comes in at BG.
 Mine weighs 20ozs.

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #14 on: June 02, 2017, 21:36:59 PM »
Okie dokie....all done and ready to fly at 560gms or 19.75oz according to Wifie digital scales  :af
I must get out more...

Offline strider2

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Re: Air One Mini Acacia
« Reply #15 on: June 06, 2017, 18:51:19 PM »
Hi All
My 4 servo wing model, c/g started at 73mm from the L/G, working towards 77mm pitch neutral, as per Andy E's post on RC/g a while back.    :uk:
Pick yourself up, Dust yourself off and MOVE on !

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #16 on: June 06, 2017, 21:52:38 PM »
Yeah CG at 77mm seems the sweet spot
I must get out more...

Offline Butzi

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Re: Air One Mini Acacia
« Reply #17 on: June 07, 2017, 04:56:58 AM »
Yeah CG at 77mm seems the sweet spot

I found that mine needed only the lightest of forward stick to fly inverted at 70mm. It seems to be quite a tolerant design. Best of all, it's a very quiet airframe  :ev

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #18 on: June 12, 2017, 18:06:23 PM »
Disaster!....I took the A1MA away in my Campervan, and when I opened the tailgate, al, the bedding fell out and landed on the tail of the fuz (elevators attached)...

I now have a split fin and crushed rear fuz.....😡
I must get out more...

Offline Butzi

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Re: Air One Mini Acacia
« Reply #19 on: June 12, 2017, 19:03:54 PM »
Bummer!   >:(

I guess it's going to need copious amounts of glass cloth and whole lot of patience to fix it.  I know that's one job I wouldn't be capable of doing so I hope I never have a serious incident with mine.  :xx

Offline Bustergrunt

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Re: Air One Mini Acacia
« Reply #20 on: June 12, 2017, 20:01:49 PM »
Yeah, I can fix this, just got to be careful not to glue up the AMT fulcrum...pics when working on it to follow
I must get out more...


 

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