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Gary's Ballerina Build

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Gary Clark 115/04/2020 19:54:39
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275 forum posts
147 photos

Hi All,

I have the TN Hunter finished and the 1/4 scale moth minor is on hold until I can get the wing (which my friend is building as part of a joint project) so with only a Sig Kougar refurb slowly happening in the background, I needed to start something new.

I've like the look of Peter Millers Ballerina since the mass build but never got around to doing one myself yet. My plan is to stick to the original design as much as possible and looking to use an Sc46 2 stroke up front. I'd have like to have an sc52 4 stroke but it's really tough trying to get one of these now.

I started to cut the parts tonight so will hopefully start to build tomorrow. Hopefully anyone with any tips or good lessons learned can let me know as we go on.

Gary

Paul C.15/04/2020 20:40:26
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676 forum posts
159 photos

Hi Gary, shame you couldn't get a 52 FS as I use an ASP 52 FS in mine and I found it to be ideal plenty of power when you want it and half throttle stooging around. If you haven't built on of Peter's models before check out his notes on how he builds the wings, easy method of building a straight wing 👍.

Paul.

Peter Miller15/04/2020 21:20:16
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11367 forum posts
1342 photos
10 articles

I shall be watching with interest.

It will go like a rocket with n SC46.  I had a similar sized design once (Dancing Girl.)  with an SC46

That one would do knife edge loops!!!!

 

 

Edited By Peter Miller on 15/04/2020 21:22:45

Edited By Peter Miller on 15/04/2020 21:23:25

Mark Elen15/04/2020 21:58:11
527 forum posts
1022 photos

Hi Gary,

Another one here watching with interest.

Cheers

Mark

Gary Clark 116/04/2020 22:11:50
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275 forum posts
147 photos

I know the SC46 will be a bit more power than required but i do like to have a little bit extra for those max performance recoveries when it's that or sawdust....not that i have a lack of confidence in myself or anything! I don't like to fly my models fast so it should be a half throttle and just leave it kind of flight.

I got the kit cut in a couple of hours and decided to wait until tomorrow to start building

20200416_204751.jpg

So i had dinner and then.....had to start building!

20200416_213450.jpg

I didn't do much but feels great to start!

Gary

dan h16/04/2020 22:42:45
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121 forum posts
36 photos

Hi gary.

Another one following along.

Dan

Peter Miller17/04/2020 08:20:58
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11367 forum posts
1342 photos
10 articles

I quite agree, too much power is far better than too little.

David Hall 917/04/2020 10:28:51
287 forum posts
16 photos

I recently bought a complete model Ballerina, it's very nice indeed. It looks to have been built by someone that knows how to do it.... but, it has an OS40FS surpass fitted... I wondered if that is enough to rise off grass.

Peter Miller17/04/2020 10:47:13
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11367 forum posts
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10 articles

Oh trust me!!! Mine has an OS40 Surpass and it flies beautifully on that. All the aerobatics at a civilised pace. I have now converted to Electric with a 3541 1070 motor and it is almost as good, just lost the edge a little.

Edited By Peter Miller on 17/04/2020 10:47:48

Gary Clark 117/04/2020 10:56:08
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275 forum posts
147 photos

I was tempted to go electric on this model but I feel like my last few have been electric and I worry I will have fewer and fewer glow/gas models. The appeal of electric is huge due to ease at the flying field and no cleaning up after but I still love to have a proper engine up front. Just a pity it's tough to get a suitable four stroke that isn't extortionate now. If anyone has a suitable second hand one then let me know!

Peter Miller17/04/2020 11:45:53
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11367 forum posts
1342 photos
10 articles

I know just what you mean. Lugging all the gear across two hundred yards up a slope is exhausting. Even the youngsters of 70 find it a drag!!! I still have four i.c powered models and a spare 30FS but.....?

Gary Clark 120/04/2020 09:29:27
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275 forum posts
147 photos

Hi All,

I've been making some progress and getting the wing done.

20200417_153608.jpg

This photo refuses to turn the correct way up so sorry for that! The construction is standard and simple but enjoyable. Nice clear plan to build from so far.

20200419_221925.jpg

I currently have the lower cap strips on and now the front 1/16 sheet on top to stiffen the wing before removing from the board. Gary's top tip, don't forget to cut the holes for the control rod in the ribs before you glue everything in.....it is much less fun to do once the wing is built! I have still to add in the dihedral brace but my plan is to gel that into both at the same time. This will mean building the second wing on the board in the same way but remembering to make a mirror image and then put the 2 sides together as peter did on his build log. I can't decide wether or not to do the wing tips now or once the wings are built and together. i am thinking later to avoid damaging them but not sure.

Enjoyable build so far.

Gary

Peter Miller20/04/2020 09:46:38
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11367 forum posts
1342 photos
10 articles

That is the secret of a warp free wing, complete the "D" box LE befre un pinningthe wing.

I then prop up the completed wing agaainst the second wing before fitting R-1 to the second wing. This means a perfect fit.

I had one person who phoned me and complained that there was no teplet to show what angle to fit the R-1s. He had ended up with a big gap between them. MY Comment was "Read the instructions" He was a club member so I could be a bit "less polite"

Definately fit the tips later.They are less likely to get knocked that way.

Gary Clark 120/04/2020 09:53:05
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275 forum posts
147 photos

Thanks Peter.

I totally agree with the idea of leaving R1 until a attaching the wings. Even if there was a template, that would rely on the rest of the build being perfect and also the wing being set at the perfect angle for the joint to be flawless. Doing it our way means that even if you dont have the exact dihedral the designer planned, the joint is perfect (in theory obviously!)

Gary

Peter Miller20/04/2020 11:52:08
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11367 forum posts
1342 photos
10 articles

I developed that sequence because I always had a gap.

It also makes my system of making the hole for the front wing dowel work better.

The person mentioned above used a piece of brass tube instead of a wing dowel and didn't glue it in.

On the first flight when the model was inverted the wing fell offdisgust.

Gary Clark 120/04/2020 12:31:12
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275 forum posts
147 photos

haha well if that's not a good reason to change your technique then i don't know what is!! Just blame it on interference or something wink that's my favourite excuse to hear after a crash!

Peter Miller20/04/2020 12:34:54
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11367 forum posts
1342 photos
10 articles

I have learned that honesty is the best policy.

My usual excuse is "I goofed!!"

They always believe that!!!

Gary Clark 121/04/2020 16:05:15
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275 forum posts
147 photos

Hi guys,

More progress made to the Ballerina wing. I have the second wing up to the stage of joining it to the starboard side. I still have to complete the box section at the front so it is still pinned to the board but i needed the R1 in place so that i could sheet the top and close the box up to prevent warps.

I used the method Peter and I discussed earlier and attached everything whilst the wing was still pinned. This means a very tight joint and hopefully a straight, strong warp free wing.

Sorry about the photos, they seem to rotate when i upload then and i can't seem to sort that. Crinked neck it is...

20200421_154714.jpg

I made 2 jigs to sit the end of the wing on. Peter has in the plan that each wing is to have 1" at each end rib so because one end is pinned down i put these at 2". Hopefully I've interpreted this correctly but if i have not, it's too late and that's the dihedral she is getting! blush

The joint ends up fairly tidy using this method and the ply brace fits perfectly so that's reassuring when it comes to dihedral angle.

20200421_151355.jpg

Hopefully that makes sense and please chip in if anything has anything to add.

Gary

Mark Elen21/04/2020 16:10:10
527 forum posts
1022 photos

Hi Gary,

Looking good. What are you using to take photos with? I have found that I have to take my photos ‘landscape’ to get them into the forum album the right orientation with my IPhone.
Keep up the good work with the Ballerina, it’s a beaut.

Cheers

Mark

Gary Clark 121/04/2020 16:40:51
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275 forum posts
147 photos

Cheers Mark.

I'm using my samsung S8 but you may be right, I'll have a play about and see what orientation helps because it only happens with some of the Photos. I'm looking forward to starting the fuse so that I get an idea for how she looks for real.

Gary

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