Pilot (OK Model Co. ) Akromaster in Corro and Electric

sanjayrai55 · June 12, 2015, 06:51:12 AM

Originally designed as a Balsa Model for 25 size engines, this has been adapted to corro.

Plans are on Outerzone.co.uk

Brief Specs: Fuselage - 990 mm 39"
Span - 1360 mm 54''
Wing Area - 27 dm²
Weight - 1500 to 1600 g
Channels - 4
Engine - 25

sanjayrai55 · June 12, 2015, 06:55:05 AM

For anyone making this, I would recommend narrowing the fuse front by 1''. It's too wide - guess it was originally supplied with a cowling, with dual air intakes so the width was to accommodate that

sanjayrai55 · June 12, 2015, 06:58:26 AM

I will be using the following power plant:

Motor : 3536-1400 NTM
ESC : HK 60 A
Prop : 11*5.5
LiPo : 3300 3C 20s

sanjayrai55 · June 12, 2015, 07:01:53 AM

Wing is 3 mm Corro, Fuse and Horizontal Stabilizer are 4 mm, Vertical Stabilizer and Rudder 3 mm doubled to 6 mm.

The spar is 12 mm balsa doubled in the centre portion

sanjayrai55 · June 12, 2015, 07:02:59 AM

sanjayrai55 · June 12, 2015, 07:04:17 AM

Servos: 2 of 17 gm Metal Gear (Elevator & Rudder)
2 of 10 gm Metal Gear (Ailerons)

sanjayrai55 · June 12, 2015, 07:04:55 AM

Hatch for LiPo

sanjayrai55 · June 12, 2015, 07:07:44 AM

Wing bolted

I make the supports as in the picture above, and trial fit the wing with rubber bands. Then drill through, and remove the wing; fit blind nuts into the support plates

sanjayrai55 · June 12, 2015, 07:08:29 AM

sanjayrai55 · June 12, 2015, 07:09:27 AM

sanjayrai55 · June 12, 2015, 07:10:27 AM

sanjayrai55 · June 12, 2015, 07:11:40 AM

sanjayrai55 · June 12, 2015, 07:12:46 AM

sanjayrai55 · June 12, 2015, 07:13:45 AM

sanjayrai55 · June 12, 2015, 07:15:59 AM

CG Balancing. Distance pre-set at the recommended as per design

sanjayrai55 · June 12, 2015, 07:17:54 AM

Vinyl Trims applied to complete

sanjayrai55 · June 12, 2015, 07:18:47 AM

sanjayrai55 · June 12, 2015, 07:19:41 AM

Maiden planned for tomorrow

docnayeem · June 12, 2015, 08:18:31 AM

Habituated as you are ... An excellent model once again... All the best for the maiden sir

sanjayrai55 · June 12, 2015, 09:21:22 AM

Thanks Doc

aditya · June 12, 2015, 09:55:02 AM

Nice model sir ..

Waiting for maiden..

topalle · June 12, 2015, 11:10:58 AM

How did you get the glossy finish sir?
I mean the finish of the black area.

sanjayrai55 · June 12, 2015, 11:27:27 AM

Thank you Aditya

sanjayrai55 · June 12, 2015, 11:28:02 AM

Quote from: topalle on June 12, 2015, 11:10:58 AM
How did you get the glossy finish sir?
I mean the finish of the black area.

If you read the post.....I use Vinyl Trim

K K Iyer · June 12, 2015, 11:40:56 AM

Sir,
Besides the quality of professional workmanship and the quality of the accesories used, it is the small details that blow me away.
This time it is the rivets on the windscreen...

sanjayrai55 · June 12, 2015, 12:13:50 PM

Thank you Iyer sir

Believe me when I say my total spend (without electronics & Landing Gear) on a model like this is less than 600 Rs.

After crashing I recycle the parts

Rivets, glad you noticed them. I didn't

Unless you meant the 6 mm long Self Tapping Screws holding the windscreen (which is cut out from an Indigo Air drinking water glass

) to the 6 mm balsa base plate, which is black because I covered with coloured tape

sanjayrai55 · June 12, 2015, 12:19:40 PM

Someone PMd me as to how I got full size plans

1. Why PM? Put it on the forum; someone else too might have the same query
2. If you read some of my earlier posts this has been answered before
3. Go to a big photocopy shop - the type who have A0 A1 printer/plotters, normally do Engineering/Architectural drawings. The rate in my place is Rs. 80.
4. Please don't ask where I got the plans. Take your plan in a pen-drive in a .pdf format and ensure printing at 100% size

Devanesan Andrews · June 12, 2015, 12:46:27 PM

Sanjay sir... Thank u for ur words... I won't do pm here after...

sanjayrai55 · June 12, 2015, 01:18:13 PM

Hey Dev, you are always welcome! Jut ensure Personal Messages are of a personal nature

sundaram · June 12, 2015, 01:29:56 PM

Once more a beautiful model sir.

satz flying · June 12, 2015, 03:08:37 PM

Awesome work sir.

vishalrao · June 12, 2015, 03:38:28 PM

Awesome Sanjay sir

Beautifully done!

prashant_rc · June 12, 2015, 04:06:20 PM

Sanjay sir excellent build

Sir how to make cuttings in formers I want to know whether it is with jigsaw motor driven or hand driven

sanjayrai55 · June 12, 2015, 04:23:31 PM

Quote from: sundaram on June 12, 2015, 01:29:56 PM
Once more a beautiful model sir.

Thank you Colonel! Now come and fly it while it is still fresh

sanjayrai55 · June 12, 2015, 04:24:13 PM

Quote from: satz flying on June 12, 2015, 03:08:37 PM
Awesome work sir.

Thank you Satz

sanjayrai55 · June 12, 2015, 04:24:56 PM

Vishal. Now if only I had your flying skills....

ashok baijal · June 12, 2015, 04:29:07 PM

Beautiful model as usual

sanjayrai55 · June 12, 2015, 04:46:06 PM

Thank you Prashant

To cut the inside holes/rectangular openings in the formers, I first drill holes in the corners of the opening to be cut. Then either I use a coping saw, or small circular saws on a Dremel or flexible shaft grinder. Finish off with a file

sanjayrai55 · June 12, 2015, 04:47:37 PM

Thank you Ashok-ji. Now that the sweepstakes are here, I am really looking forward to your builds, to see how a master does it!

RcBazaar · June 12, 2015, 05:25:40 PM

WOWWW.... as usual what a superb build... in await for the maiden videos... can we share these pics on our facebook page?

regards
Sujju

sanjayrai55 · June 12, 2015, 05:40:10 PM

Thanks Sujju. I'm honoured

prashant_rc · June 12, 2015, 08:16:59 PM

Sir your patience while working on a model is great

Also landing gear for models are readymade or made from aluminium

sanjayrai55 · June 12, 2015, 08:36:35 PM

Both - readymade and aluminum (an Alloy)

See this - http://www.rcbazaar.com/product.aspx?productid=1177

Available also at RCD & HK

Good till 1.6~ 1.7 Kg models (25 size)

rcrcnitesh · June 12, 2015, 08:37:20 PM

Ugghhhh!! The worst build I've ever seen (being sarcastic)
What to do, you have blowed up my mind leaving only such words.

sanjayrai55 · June 12, 2015, 09:12:03 PM

Thanks Nitesh (I think

)

Last pics before maiden

topalle · June 13, 2015, 10:06:12 AM

Where is Calvin?

sanjayrai55 · June 13, 2015, 12:01:40 PM

I used a Balsa spar

No maiden possible today - Gale force winds

maahinberi · June 17, 2015, 05:40:45 PM

Beautiful Build as usual sir. Waiting for Maiden.
Personally, I feel the thick fuse looks very good.

jana.f22 · June 17, 2015, 08:33:06 PM

superb build sir I love the colour scheme

sanjayrai55 · June 17, 2015, 08:53:38 PM

Maahin, thanks! But you said the fuse had to go on a diet........

sanjayrai55 · June 17, 2015, 08:54:26 PM

Thanks Jana

rastsaurabh · June 17, 2015, 09:04:53 PM

Sir, Excellent built. But I am not able to see PICs......( I have seen it on the BOLTZ Whatsapp)

May be its office LAN or some security thing, request you to put pics the normal way on RCI.

In case you want to put High quality images you put both so that everyone is able to see your fabulous builtz.

regds
Saurabh

sanjayrai55 · June 17, 2015, 09:14:31 PM

No

taitil · June 18, 2015, 08:30:08 AM

Lovely plane Sir

Always make nice and Attractive Look Model.

sanjayrai55 · June 18, 2015, 10:53:29 AM

Taitil-bhai, thanks

Haven't seen very much of you on RCI. Hope to see more builds from you

girishsarwal · June 18, 2015, 11:33:00 AM

I find wide fuses great because of the large volume that one gets inside. They do add to the drag, but if the front of the fuse is adequately tapered, I believe the drag/air block can be smartly tackled with.
Look forward to the maiden.

taitil · June 19, 2015, 07:48:09 PM

I was busy in work Sanjaybhai. I also want to make model for this sweepstake. And i will Try.

sanjayrai55 · June 19, 2015, 07:50:07 PM

Good luck, all the best

sanjayrai55 · June 29, 2015, 01:17:35 PM

Finally, the video

Expert Test Pilot Girish Sarwal at the controls

girishsarwal · June 29, 2015, 01:37:12 PM

As usual chief, Awefffssum build

maahinberi · June 30, 2015, 08:24:53 AM

Very nice plane. Flies very stable

Sandeeppande · June 30, 2015, 08:33:42 AM

Awesome build & great flying

b4ggu · July 22, 2015, 05:46:39 PM

Another super build Sanj.... The build quality has got better too what super decals and finish..Too Good!

sanjayrai55 · July 22, 2015, 06:11:05 PM

Thanks Dee

rcrcnitesh · July 22, 2015, 06:19:37 PM

Really amazing especially the video.

b4ggu · July 23, 2015, 05:01:52 PM

Sanj compared to MPX Acromaster, how different is this in specs and characteristics?

Also now that you have perfected the build and planes, which model flies the best in your opinion... I mean which model flies best at slow speed but is good in aerobatics at fast speed too..... Which one is the most stable model out the ones built so far?

You recommended Spad Cap 232 ..I have got that on the build should be read soon... Is coming to around 1,6KG without Lipos... Lets see how it flies??

Need to build one of these two next; .......Chris Foss Acro Wot or MPX Acromaster! Any idea where I can get some plans?

sanjayrai55 · July 23, 2015, 06:25:30 PM

Dee this has no link whatsoever with the MPX Acro. That is a 3D, and this was created in the 1970s when 3D had not yet entered aeromodelling

A model with very good slow flying characteristics - and good aerobatics at high speed? Most of the corro ones I've built have met their demise through the dreaded tip stall at low speed, mostly on the landing approach. So no, have not really come across something like the MPX FunCub

1.6 kg - something is wrong Dee! Mine was 1.1 Kg without LiPo.

b4ggu · July 23, 2015, 10:22:25 PM

I will weigh the wing and fuselage separately and upload... Ended up fitting metal gear 17gram servos throughout. The lipo hatch is 6mm Depron (2 sheets of 3mm with scrim tape in between) on the fus with hot glue instead of chart paper... Also needs some nose weight as the balance point is not as desired...

sanjayrai55 · July 30, 2016, 01:51:18 PM

Was just reminiscing the very sad end of this model. No, it didn't crash. Was unsighted, and went off the field onto the road.
Never found it

Sent from my Mi 4i using Tapatalk

gaurang.1972 · August 01, 2016, 01:57:16 PM

Very good build rai sir and good flight

wingmanbunty · August 01, 2016, 02:23:52 PM

nice

sanjayrai55 · August 01, 2016, 05:01:40 PM

Thank you Gaurang and Bunty

(It's one year old though

)

b4ggu · August 01, 2016, 07:44:23 PM

Sanj,
My Spadcap met the same fate...Its lying in the Rapefield crop somewhere. I left my number with the farmer but he never called so either it was chewed up by the combine harvester or he has passed it on to someone.. ahh never mind..
However my Akromaster is coming up very nicely, will post some more images on the blog soon..

sanjayrai55 · August 01, 2016, 07:46:47 PM

All the best, and waiting for it

b4ggu · August 13, 2016, 12:33:37 AM

Nearly completed the Akromaster today.. Will post the blog on a new thread.. Sanj you have probably made 10 models in the time it has taken me and Allan to make this one.

But we have had fun and its been very enjoyable.. Thanks for your inspiration. All we have to do now is fly it...

sanjayrai55 · August 13, 2016, 05:54:34 AM

Congratulations Deepak! Looks superb

Especially love the little curves on the wing and tail feather's tips

manojswizera · August 13, 2016, 10:19:33 AM

Beautiful model sir.
me to like those curves.

b4ggu · August 15, 2016, 11:11:04 PM

Thank you Sanj and Manoj... Had a lovely day yesterday flying other planes, would have been good if we could have test flown the Akro but Allan had to make slight alterations to it and he could not complete the same and bring it to the field.. Maybe next time..

sanjayrai55 · October 10, 2018, 05:35:15 PM

sanjayrai55 · October 10, 2018, 05:58:21 PM

Gallery

https://postimg.cc/gallery/f2q5koz0/