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Old Apr 28, 2013, 06:06 AM
unconventional :-)
kadil's Avatar
Brisbane north, Australia
Joined Feb 2009
2,111 Posts
Build Log
Introducing the Mak22

Inspired heavily by the amazing Mako:

http://www.rcgroups.com/forums/showthread.php?t=1696964

and the equally amazing F22:

http://www.rcgroups.com/forums/showthread.php?t=740049

I have started a seaplane that combines my favorite aspects of each, hence the name based on the names of each.

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Parts are only taped up and I like where it is going.

Wingspan: 630mm
AUW: 390g
Motor: 2212/6 2200kv
Prop: APC 6x4

and I would prefer to scale this model up 10% next build. Mak22 will be elevon taileron controlled with twin servo's for rudders. There is easily room for a 7" prop. so I am thinking 7x4 with a 2C battery, but testing will be used to decide.

I am also going to let results from testing determine how much extra vertical stabilizer and rudder I need since I like low profile, tight models.

I am hoping for a seaplane that will be an easy build, with good low speed flight control, good water handling and enough power to pop out of the water with ease. As you can see this is the prototype, so wish me luck

If the owners of the respective source plans agree then I will happily share the template plans for scratch builders.
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Last edited by kadil; May 04, 2013 at 08:55 AM. Reason: Update photo's
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Old Apr 28, 2013, 07:56 AM
Registered User
Fort Smith Ar
Joined Oct 2005
923 Posts
That looks cool. I will be following your progress. Good luck.
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Old Apr 28, 2013, 03:45 PM
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ak68's Avatar
Nederland, ZH
Joined Dec 2011
667 Posts
As expected you do come up with something with a personal twist! Nice one Kadil. Good luck with the build, the glide test and the maiden.
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Old Apr 28, 2013, 04:13 PM
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Ridgewood ,NJ
Joined Jan 2000
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Old Apr 29, 2013, 02:04 AM
unconventional :-)
kadil's Avatar
Brisbane north, Australia
Joined Feb 2009
2,111 Posts
Good progress today:

mak22-01 (0 min 53 sec)



Steps remaining:
  • Control horns
  • Control rods
  • Fit Rx and ESC in fuse
  • Electrical wiring
  • Battery velcro
  • Learn to program elevons on the 9XR

Then taxi test.
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Old Apr 29, 2013, 03:14 AM
"Fly, yes... Land, No"
OutcastZeroOne's Avatar
United States, CA, Santa Cruz
Joined May 2005
1,333 Posts
looks cool! reminds me of a manta ray because of the shape of the wings to the front. Like a manta with its front fins rolled up. A full lying tail too! should be interesting to see how that much tail will throw that little of a plane around
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Old Apr 29, 2013, 03:20 AM
unconventional :-)
kadil's Avatar
Brisbane north, Australia
Joined Feb 2009
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Quote:
Originally Posted by OutcastZeroOne View Post
looks cool! reminds me of a manta ray because of the shape of the wings to the front. Like a manta with its front fins rolled up. A full lying tail too! should be interesting to see how that much tail will throw that little of a plane around
It looks VERY short

But the wing is the same as the F22. So I am hoping it will inherit a lot of flight dynamics from there.
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Old Apr 29, 2013, 03:48 AM
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kadil's Avatar
Brisbane north, Australia
Joined Feb 2009
2,111 Posts
Cool, AUW is 390g with 2C battery
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Old Apr 29, 2013, 03:53 AM
"Fly, yes... Land, No"
OutcastZeroOne's Avatar
United States, CA, Santa Cruz
Joined May 2005
1,333 Posts
I must just build really light. my F/A-241 Shrike has a total of 26" wingspan and comes in at 190g

Just from my experiance with my Shrike design, it has a very narrow wing, kind of like what youve got on you mak22, but much longer wing. It will do loops inside of 10' at half power. your Mak22 having a shorter wing may make it interesting.
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Old Apr 29, 2013, 03:59 AM
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kadil's Avatar
Brisbane north, Australia
Joined Feb 2009
2,111 Posts
My battery is 96g, motor is 55g and esc with heatsink is 60g.

Total of these components is 211g. 21g more than your whole build?

What hardware are you running?
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Old Apr 29, 2013, 05:45 AM
Aus
ʎןɟ inverted ɹǝpunuʍop
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Australia, ACT, Amaroo
Joined Jul 2011
1,268 Posts
I'll strap in for this ride . I'm sure there will be lots of twists, turns and fun. Good luck with the build.

Aus.
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Old Apr 29, 2013, 06:47 AM
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kadil's Avatar
Brisbane north, Australia
Joined Feb 2009
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Welcome Aus.

Here are some planform comparisons between the Mak22, the jewel of my fleet the Polaris (actually the only surviving model), and the (work in progress) 80% scaled mutant polaris .

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Looks like comparable wing area. My all time favorite polaris was 80% and 400g, the Mak22 is a shade lighter.

Those tail feathers are massive, my biggest concern is the elevons. Such a small hinge line for such a big control surface. I will test gently, but expect to extend the hinge across the full width of the tail and lose the outside tabs.

The Mak22 is getting wet tomorrow
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Old Apr 29, 2013, 07:41 AM
Aus
ʎןɟ inverted ɹǝpunuʍop
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Australia, ACT, Amaroo
Joined Jul 2011
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I expect it will be very pitch sensitive, so please reduce your throws and/or have dual rates set. Straight for a water maiden or just some taxi tests? Good luck and I look forward to reading your progress tomorrow.
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Old Apr 29, 2013, 07:50 AM
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kadil's Avatar
Brisbane north, Australia
Joined Feb 2009
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Quote:
Originally Posted by Aus View Post
I expect it will be very pitch sensitive, so please reduce your throws and/or have dual rates set. Straight for a water maiden or just some taxi tests? Good luck and I look forward to reading your progress tomorrow.
Yes, going to try small throws only.


Taxi test tomorrow, being a short model it may not glide very well.

Hope to keep this model on 2c batteries so power will be interesting. Maybe some short hops but no flying tomorrow.

Also have to find the cg.
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Old Apr 29, 2013, 07:59 AM
Aus
ʎןɟ inverted ɹǝpunuʍop
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Australia, ACT, Amaroo
Joined Jul 2011
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Short hops hey? I'm backing you at shorter odds than Black Caviar that as soon as she starts hoping, you'll turn it into a flight .
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