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The Ohmen


EarlyBird
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The treatment starts with a sharp knife for a bit of whitling.

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A few big bits.

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Then I used my plane to get a rough size, making sure not to go too far.

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A bit more plane, I think.

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That's close enough with 1/16" at the bottom and just not touching the top leaving it at 5/16"

Next, I held it in place on the TE for a close shave with the plane.

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That will do nicely.

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After a bit of sanding.

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It's ready for the TE to be cut off (98 mm) and glued. Leaving the remainder for the aileron.

 

That's next then fit the hinges and finish the wing tips.

 

Steve

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My late wife's Ohman is sitting in the spare room, but I'll get it out for a flight and post the picture at the field 🙂 

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The main problem if you could call it that is the Grumpy Tiger Cub is my go to fly in almost any conditions super fun model and it goes in the car without taking the wing off.

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1 hour ago, Chris Walby said:

My late wife's Ohman is sitting in the spare room, but I'll get it out for a flight and post the picture at the field 🙂 

image.png.1ad630e4af0fe393853304029b47f30e.png

 

The main problem if you could call it that is the Grumpy Tiger Cub is my go to fly in almost any conditions super fun model and it goes in the car without taking the wing off.

image.thumb.png.e0ba48c3ad6426c1e8f56fbf62a13d7e.png

 

 

 

 

 

 

VERY NICE!!!!

 

Ah Yes!!! we have an unflown one in the club...waiting to hear how the builder likes it but his is electric. Not the same!!!

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Sorry to hear you’re not going flying at the moment Peter - perhaps a nice summer will get you out and about next year?

Re. the electrifying of your models, I think (hope) you approved of my reverse direction (EP to IC) reduced scale 40” span Ohmen which has a lovely little OS20 four stroke in it.  I've also been lucky enough to fly several standard builds - all a delight, as well as a 1.5 times version (Grohmen?)…and a twin (Twohmen!)

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1.5x version shown with my 85% IC “Glohmen”

 

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Hi Martin

I  never mind what people  do  to my designs, it is also designing  and people can improve on them in that way.

What matters is that people have fun and  enjoy  what they do.

 

I am designing an interesting model at the moment just to keep my mind working. It is the MW 9 Plank.  Look it up on You Tube.  If I don't make it I have a  very experienced builder who says He will "one day".

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8 minutes ago, Peter Miller said:

Hi Martin

I  never mind what people  do  to my designs, it is also designing  and people can improve on them in that way.

What matters is that people have fun and  enjoy  what they do.

 

I am designing an interesting model at the moment just to keep my mind working. It is the MW 9 Plank.  Look it up on You Tube.  If I don't make it I have a  very experienced builder who says He will "one day".

Well it flies very well, although I think the rudder/drag flaps are very interesting ! Would be great to see a build log of something so unusual. 

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56 minutes ago, Peter Miller said:

I agree about the drag flaps.  I wonder why they are needed when there are elevons. They might be a step too far. We shall see.  I do favour the KISS principle. Keep it simple stupid!!!

Might not be needed on a model, but full size perhaps it feels better and has its use to yaw the aircraft with say cross wind landings. The alterative would be to use the elevons to roll, but that then drops s wing..not what you want when touching down! We would just land into wind. I have found a few deltas with wing tips yaw backwards and forwards in cross wind where as the plank with a centre fin tends not to. The other interesting bit is the location of the wingtips as they look almost behind the wing. Perhaps that reduces the yawing?

Edited by Chris Walby
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