steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166 
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Post by steadykev on Jan 2, 2014 20:51:14 GMT
Hi all,
In my forum intro, I mentioned that I am scratch building an `orion` 55" span, 2ch glider (from a west wings plan). The wing is designed with a certain amount of washout at the wing tips, but doesn`t actually state on the plan how much your supposed to end up with.
So, my question is how much is desirable and how much is too much?
What are the effects of having too much or too little?
I`ve no doubt it will fly ok and i`m thinking that the washout will help with turning and/or tip stalling---am I right??
Your thoughts?
Thanks folks.
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Post by JG on Jan 3, 2014 9:38:16 GMT
Hello Kev - To be honest i have never built a Orion but i have built a Gentle Lady and i put the washout in when covering, but if i remember correct if you put too much in it will not fly as i did with another Gentle Lady and it cashed by trying to stall all the time.
In my opinion you don't have to have washout but it helps.
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Jan 3, 2014 10:20:48 GMT
Thanks admin. I think just a little may help then. I will do as you did and wait till I cover it so I can `adjust` it by shrinking the film in strategic places.....famous last words  cheers. |
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Post by Jef on Jan 11, 2014 21:07:05 GMT
As a rough rule of thumb, if washout is required, around 1mm (on each tip) for each 10inches of span should do it. So on a 55" span model, 5-6mm would be sensible.
Personally I would build the washout in, and check it after covering, otherwise, through the everyday variations in temperature and humidity, the wing will tend towards straightening itself.
Hope this helps.
Jef
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Jan 11, 2014 21:51:25 GMT
Thanks for that Jef. Good point about humidity and temperature. I think I will build it in rather than let the covering do all the work. Obvious when you think about it !! ( I did say I had been away from modelling for quite a while  ) The wing span is actually 59.5" not 55 as I quoted (I was thinking of a previous build idea)., but I`ll go for around 6mm max washout. Many thanks |
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Jan 12, 2014 10:31:33 GMT
Morning all, I`m off into the workshop today to get this wing built. All the ribs are sanded, jigs made for the `built in` washout, plenty of tea, coffee and biscuits, radio on-----bliss  see you later |
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Post by JG on Jan 12, 2014 15:32:59 GMT
Good Evening, sounds like a good plan to me, keep us all posted on your progess |
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
|
Post by steadykev on Jan 12, 2014 17:22:29 GMT
Hi everyone, Well, after a good few hours in the workshop, the wing is built and i`ve ended up with 4mm of washout at the tips. Slightly less than prescribed but i`m ok with that. From what I gather it`s better to have too little than too much. At least it`s the same amount at both ends ! I`ll try and post some pics once admin have kindly re-sized them for me ( a hint there admin to check your email  ) Cheers all. |
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
|
Post by steadykev on Jan 12, 2014 20:09:51 GMT
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
|
Post by steadykev on Jan 12, 2014 20:18:39 GMT
A few more pics of the tail feathers and fuz. The cut out on the balsa canopy by the way is for the voltspy battery monitor and the black `lines down the side of the fuz are carbon fibre tows to strengthen it as these models have a habit of breaking the fuz towards the rear. Looks a mess at the moment, but once sanded and covered it will be fine. Note also the enlarged rudder (about 20%) to give better control and the (perhaps excessive) lightning holes. Cheers everyone.    |
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Post by JG on Jan 12, 2014 21:04:15 GMT
Looking good Kevin, good to see some building going on, that reminds me i have some work to do as well |
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Jan 12, 2014 21:53:07 GMT
Yes,there`s always something to be done and I reckon that`s one of the great aspects of the hobby.  |
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Feb 3, 2014 13:47:43 GMT
Hello everyone, thought I`d post some pics of the now finished `orion` Cheers all.   |
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steadykev
Junior Pilot
.....of course it`ll fly....
Posts: 166
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Post by steadykev on Feb 3, 2014 13:49:14 GMT
......and one more.  |
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Post by JG on Feb 3, 2014 14:04:58 GMT
Good Afternoon Kevin
WOW well done i do like that, looks very nice and shiney and well covered, i bet your pleased with the finish. What's in the boxes under the build board ??
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