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The Ohmen


EarlyBird
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Thanks guys.

The wood is from Sarik but bought when there was a balsa shortage and quality suffered as a result.

Before that I did not know the difference between good and bad, now I do. Which is good it's all part of learning.

Also now I can tell the difference between hard and soft, hard is hard to sand.? Soft is easily dinted with a fingernail but easy to sand.

 

This experience has taught me to grade and select the balsa. I also worked out that the thick 1/16" is not 1/16" but 3/32", don't ask. ?

 

I am having fun and learning more than I expected from an easy build.

 

Another lesson learned was that Trevor advised to build the wings first and use the fuselage ply doubler as a profile gauge. Works a treat and could explain something I did not understand with the Ballerina.

 

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LE shaped, bottom cap strips added and started sanding all over.

Pleased with this.

IMG_20210830_083516432_HDR.thumb.jpg.fc90dada78b8293f106cd2ec2a6c311f.jpg

Join what join? Obviously the sheeting is one piece, why have I not done this before I ask myself.

Just a couple of minor imperfections, one where the plane dug in and the sheeting to TE join. It looks like I will have to make up some filler ☹️ or just leave it as no one will notice.

 

Servo mounts and sheeting, wing tips and ailerons is all that's left to do. The list is getting shorter, which is good.

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12 hours ago, john stones 1 - Moderator said:

Nice work Steve, I like to read a blog when the builders enjoying himself. ?

Thanks John I am pleased that my sense of fun is coming across.

 

Aileron.

Fitted hinges.

IMG_20210901_105525174_HDR.thumb.jpg.17e1675afa27b12dd8868cba68fb3ff0.jpg

 

Marked out the positions on the wing.

IMG_20210901_105954700_HDR.thumb.jpg.f37f52077340d4a279370e2b81f46f0c.jpg

 

Cut and fitted

IMG_20210901_113314890_HDR.thumb.jpg.162339b2e3688af735042e9a91f309fe.jpg

 

and shaped.

IMG_20210901_113329876_HDR.thumb.jpg.200f2aa090fc5cfd7ebc1e75f63475ab.jpg

 

Looks good to me and with practice is becoming easier hopefully the quality will improve. ?

 

What's next the other wing tip or servo bay on this wing or some gardening ?

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That's a strange looking deer, must be special to Suffolk or is it Chinese?

 

Tip of the day.

IMG_20210903_065446.thumb.jpg.3d73b0f55d4eaf2affd5fc6e870f1088.jpg

Not finished because I started thinking about

IMG_20210903_065411.thumb.jpg.8704fef10b3857d14035bd282cd6eb92.jpg

Not finished either because, dare I say, I started cleaning up onions for storage, which is not finished either.

Today I will finish something ? ? 

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and finished.

IMG_20210903_175944.thumb.jpg.797dae0ea8605b2f05df309d797a5179.jpg

 

Onto the fuselage ?

Looking at the Hound Dog has encouraged me to make some changes.

I will copy the battery hatch design but I am also considering changing the shape of the nose as well.?

Then not wanting to add weight to the tail I am thinking that I could shorten the nose by moving F1 back, but by how much 20mm?

The first step is to sketch the changes on the drawing. The second step is to make my mind up, this could take some time. ?

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11 hours ago, Peter Miller said:

With the battery in its existing position it is further back than it would be in the modified Hound Dog location.

I am using a 2200 3 cell battery in Hound dog and STILL need an ounce of lead in the tail. and the battery is about  1" back from F-1.  Hound Dog will be test flown on Sunday

Interesting, more food for thought to keep the cogs turning. I will wait for your test flight before taking a saw to the fuselage. 

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Moving F1 back 30mm.

IMG_20210904_101945.thumb.jpg.1e281e4d8da05f074cd0201c54c58abc.jpg

has very little affect on the formers and the reshaping is in the cowl.

Also the battery will easily fit and there is plenty of room to move it further back.

This is a 3S 2200 a 4S 2200 is also a good fit which gives more options.

I have also been thinking a lighter higher kv motor would help. Too much thinking maybe.

 

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Next day when the glue has had plenty of time to dry.

Clamp the two sides to check they are identical and sand as necessary.

IMG_20210905_080826.thumb.jpg.ee8c7889ac3fe024c2eba6d8cfecd0a5.jpg

 

As I have moved F1 back I cut and sanded the balsa sides to match the ply doublers.

Next prepare F1-F5 formers. F1 and F2 will need special attention as I have changed the shape in front of F3.

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