soarguy
New Pilot
So many projects, so little time...
Posts: 8 
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Post by soarguy on Feb 10, 2014 15:54:01 GMT
All,
I am working on TopModel's Astra V glider for the coming season. The design is pod and boom fuselage, and the instructions call for the wing to be at 1 degree, and the v-tail at 0 degrees. Problem is, there is no referance datum line given...
Am I correct in thinking that, as long as there is a +1 degree differance in the wing in relation to the tail, all should be well?
Thanks for all ideas,
soarguy
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Feb 10, 2014 16:46:53 GMT
Hello Soarguy, I don`t have an answer for you to be honest, but rest assured there are folk on here who will know and hopefully enlighten you.  All the best Kev. ps: just a thought but would it be worth emailing Topmodel`s to ask them ? |
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soarguy
New Pilot
So many projects, so little time...
Posts: 8
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Post by soarguy on Feb 10, 2014 21:20:38 GMT
Hi Kev,
Yep, sure enough; I e-mailed them early today. I am in the US, they are in eastern Europe, so I figure they won't see the message until tomorrow, and I just wanted to have it 'out there' in case someone else has dealt with this issue already.
We'll see what they say...
Thanks for the reply!
soarguy
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Post by Jef on Feb 10, 2014 22:12:52 GMT
If it has a tapered boom (not all booms are tapered) and the bottom of the wing section is parallel with the top of the boom, and the centre of the tailplane section is parallel with the bottom of the boom, that will be very close to the required 1 degree of decalage.
It would be good to hear what the manufacturer says though... Alignment of a vee-tail is often a very tricky process.
Best regards,
Jef
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soarguy
New Pilot
So many projects, so little time...
Posts: 8
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Post by soarguy on Feb 11, 2014 13:12:22 GMT
Jef,
Your estimation regarding boom taper is just about right. I did get a reply from TopModel, and am told that the datum is the center line [axis] of the tube; so, it should not be a huge deal to jig the fuse up and get accurate measurements.
To the bench!
soarguy
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Post by Jef on Feb 11, 2014 13:25:41 GMT
Jef, Your estimation regarding boom taper is just about right. I did get a reply from TopModel, and am told that the datum is the center line [axis] of the tube; so, it should not be a huge deal to jig the fuse up and get accurate measurements. To the bench! soarguy Good Luck SG |
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