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Chris Barlow28/02/2016 21:26:56
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1858 forum posts
1266 photos

I think it's still a little nose heavy John. I'll try another 2g on the tail as she's already spot on the CoG but the nose was dropping a little in the turns.

2nd flight was a little more exploratory with some simple aerobatics thrown in, for evaluation purposes of course! The rudder is huge and very effective for stall turns etc. Needed very little rudder in rolls which were sedate but not slow. The loops were a little more aggressive but still not too tight, just nice and scale like.

She is very lightly loaded though and was showing up every little bump of turbulence and gusts. She'll look a little untidy in the wind if you leave her alone but I expect she'll be a dream on those calm summer evenings. laugh

AndyD28/02/2016 21:34:40
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712 forum posts
503 photos

your writeup describes mine exactly,i found it alittle floaty as well,lovely for slow flybys though,you looked as warm as i was today,roll on summer.

Martyn K28/02/2016 22:06:42
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5005 forum posts
3658 photos

Hi Chris

thats great news. That is at least 4 completed now. I have enjoyed this mb more than most. It's nice to get back to a one model community project

regarding your nose down in turns, have you considered aileron differential as being a possible cause? Just a thought if the inboard aileron was more draggy rather than the outer one - a bit like reverse aileron yaw.

Best wishes

Martyn

Martyn K28/02/2016 22:32:19
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5005 forum posts
3658 photos

Cracking video Chris.

I recognise Bosley Cloud in the background so I guess you are just east of Congleton

 

what video camera do you use? I am looking for something a big more upmarket than an iPhone.

Martyn

 

Edited By Martyn K on 28/02/2016 22:33:44

Chris Barlow29/02/2016 00:18:25
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1858 forum posts
1266 photos

Thanks Martyn, yes our site is east of Bosley Cloud, just outside Congleton. Ideal for powered flying or sloping! laugh

The video camera is a Sony Handycam HDR-CX330. I set it on landscape mode for flying videos as it doesn't seem to hunt for focus so much.

Chris Barlow29/02/2016 01:25:14
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1858 forum posts
1266 photos
Posted by AndyD on 28/02/2016 21:34:40:

your writeup describes mine exactly,i found it alittle floaty as well,lovely for slow flybys though,you looked as warm as i was today,roll on summer.

Yes it was quite cold at the field but with a few layers on and waterproof over trousers I was quite warm. Then the sun popped out from behind the clouds and I was toastie warm! laugh

Chris Barlow29/02/2016 01:33:01
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1858 forum posts
1266 photos
Posted by Martyn K on 28/02/2016 22:06:42:

Hi Chris

thats great news. That is at least 4 completed now. I have enjoyed this mb more than most. It's nice to get back to a one model community project

regarding your nose down in turns, have you considered aileron differential as being a possible cause? Just a thought if the inboard aileron was more draggy rather than the outer one - a bit like reverse aileron yaw.

Best wishes

Martyn

Yes I agree I do prefer a one model mass build. Definately more interest following the other blogs. yes

I might have too much diff on the ailerons but I have also added quite a bit of trim on the elevator too so I'll evaluate it tomorrow during the post maiden inspection. When I get the cowl off to check the engine mountings I'll also re connect the remote glow connector I pulled off to change the plug!

For reference I have o% expo on the ailerons and 30% on the elevator which was probably just as well as it was very responsive in pitch.

I'll measure the throws and AUW tomorrow.

Martyn K29/02/2016 08:47:54
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5005 forum posts
3658 photos

I tend to stick to about 30 - 35% rates for all surface controls but reduce the EPA rather than increase the 'rate' value when I want less sensitivity. I found that the ailerons were very responsive on medium 'rates' - the elevator less so. However, it was never twitchy. I'll manually reduce the travel on the aileron servo arms so that at medium 'rates' , 'll have it flying as I want it it.

I noted that on full throttle vertical uplines, it was leaning decidedly to the left. I may be ale to fix that will a bit of programmed in right rudder deflection mixed in with the throttle. It wont be very easy to add additional right thrust without having to do some metalwork on the cowl

Martyn

Martyn K29/02/2016 09:05:09
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5005 forum posts
3658 photos
Posted by Chris Barlow on 29/02/2016 00:18:25:

The video camera is a Sony Handycam HDR-CX330. I set it on landscape mode for flying videos as it doesn't seem to hunt for focus so much.

I was quite impressed by how well it maintained focus. I'll have a look around

Thanks

Martyn

john stones 129/02/2016 11:27:03
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10765 forum posts
1481 photos

Yep i'll go with that as well, lots of variety around a common theme and you've all behaved very wellcheeky

John

Chris Barlow04/03/2016 23:54:27
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1858 forum posts
1266 photos

Possibly my last post in this blog. I put most of the build photos together in a 10 minute video (with some pretty music) so anybody can sit back and watch the photos instead of trawling through all the posts.

Thanks to everybody who followed my blog and to the guys (and gals?) also building the Ballerina's for making it another fun mass build to occupy the dreary winter months. yes
Hope to meet some of you at Greenacres for some Ballet in the sky. laugh
john stones 105/03/2016 00:10:53
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10765 forum posts
1481 photos

Been a pleasure Chris wink

John

Low pass Pete05/03/2016 06:28:43
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222 forum posts
123 photos

Chris thanks for your blog. It has been the first mass build for me and it has been very interesting following everyone.

My offering is now way behind yours but I hope to be back on it soon. (delay due to health). I hope to be at Greenacres for the 1st time this year.

Cheers

Peter

PS Just watched your video.  Excellent and a masterclass indeed.  Well done.  yes

Edited By Low pass Pete on 05/03/2016 06:40:50

Luther Oswalt17/06/2016 19:37:31
138 forum posts

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George coleman 112/07/2016 07:29:33
6 forum posts
Posted by Chris Barlow on 09/01/2016 05:03:43:

This morning I woke up happy. Went downstairs and opened the curtains to a lovely bright & sunny Saturday morning. I felt happy because it was the start of the weekend and I had all day to get a good start on my Ballerina...

Then I woke up again. But this time it was still dark and worst of all, it was still Friday! It was all a dream! crying

It's funny how things like that can put you in a bad mood for the day so this evening I cheered myself up by starting my Ballerina for real! I started by marking out and cutting templates for the formers on paper transfer tape. This is very similar to masking tape but comes on a big roll 8" wide. These were transferred to a ply sheet and 1/8th balsa rectangles already cut out.

My bad mood briefly returned when I sheared the screw off whilst tightening the blade grip on my scroll saw, leaving the remaining thread deep in the metal grip! Not really feeling like cutting the couple of ply parts with a coping saw I set about removing the grip ready to drill the broken thread and extract it with a stud extractor. My bad mood disappeared immediately when the drill bit started cutting but then gripped the thread and wound it straight out for me! 5 minutes later it was all back together ready to start cutting again. Must be a good omen?

So after an hour or so of cutting and sanding on the bench sander I have a pile of formers ready.

20160109_032006.jpg

20160109_032046.jpg

Unfortunately I didn't have enough full lengths of 3/32 to cut the fuselage sides so they're on hold pending a shopping trip in the morning.

Finding a single length of medium 1/4 I cut and jointed the parts for the fin and rudder. No fancy built up framing for this Ballerina.

20160109_033138.jpg

Then onto the fun part, the wing ribs!

I started by making a template in ply which is basically the same for all the ribs except the tips. I then started cutting the ribs, marking them as I went to keep track of what I had cut and what was left. A lack of 1/8 lite ply meant I couldn't complete the set and that's on the shopping list for tomorrow as well!

20160109_031639.jpg

More progress tomorrow and hopefully this good mood will continue! laugh

It is amazing how you have cut these your self! really good craftsman ship. i would like to know what kind of tools you use to do this and what kind of time period it will take untill completion??

Thanks for the photo

Chris Barlow13/07/2016 17:29:25
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1858 forum posts
1266 photos

Hi George, welcome to the forum.

For the fuselage formers I usually trace from the plan and transfer it to the balsa or ply. For wing ribs I cut a ply template first then cut around that. If it's a tapered wing I use tracing paper the same as for the formers.

I have several hand tools for cutting. A heavy duty "stanley" knife, a heavy duty scalpel, a thin scalpel, a modelling saw, junior hack saw and a coping saw. I also have an electric scroll saw for thicker plywood.

With sharp blades and a steady and precise approach it doesn't take long to produce your own kit of parts.

George coleman 114/07/2016 03:14:33
6 forum posts

Hello Chris

Thanks for all the info, Most of the hand tools are easy enough to come across but when you say heavy duty what brand would you recommend? and possibly a nation wide store/website

Thanks chris

Peter Miller14/07/2016 08:22:15
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10331 forum posts
1231 photos
10 articles

He said Stanley knife. That is one of those witha retractable blade, The blades are double ended and so can be reversed,

If you don't want to invest in a powered fret or scrol saw you can buy hand fret saws which take a little practice to use but are the best tool for plywood. and a lot cheaper.

When I first started power models I bought a KK Ladybird kit which had a lot of 1/8 ply to cut out. I asked a more experienced modeller if he would cut them out for me. He didn't refuse but he did the best thing. He just didn't do it. I had to go and buy a fret saw and that one kit taught me to use it!! That was in 1954. Now I have a lovely power job which gets an awful lot of use.

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