Sagitta 900
03-23-2003, 10:13 PM
#1
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Sagitta 900
Hello to all glider guiders.
In October last year I purchased a Sagitta 900 kit from a forum member whilst on holiday in the USA. This was built exactly to plan soon after Xmas. Here in the UK the weather has not been too kind to us glider enthusiasts this winter but at last some nice sunny weather has arrived so a maiden flight was organised.
A gentle launch on an electric winch and everything was perfect.
The question is where to put the C of G for optimum results? The recommended distance from LE is 3.5" however, a colleague here in the Uk tells me that the best position is 4.2" back which seems a lot on a 10" chord. So far I have moved it back to 4" without any problem and it flies extremely well and not a bit 'twitchy'.
Anyone over there have any comments? (Not rude ones)
Cheers,
In October last year I purchased a Sagitta 900 kit from a forum member whilst on holiday in the USA. This was built exactly to plan soon after Xmas. Here in the UK the weather has not been too kind to us glider enthusiasts this winter but at last some nice sunny weather has arrived so a maiden flight was organised.
A gentle launch on an electric winch and everything was perfect.
The question is where to put the C of G for optimum results? The recommended distance from LE is 3.5" however, a colleague here in the Uk tells me that the best position is 4.2" back which seems a lot on a 10" chord. So far I have moved it back to 4" without any problem and it flies extremely well and not a bit 'twitchy'.
Anyone over there have any comments? (Not rude ones)
Cheers,
03-24-2003, 02:07 AM
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Location: Chilliwack, BC, CANADA
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Sagitta 900
The best option for setting the balance on any model is the dive test. Do a google search on "model glider dive test" without the quotes and a 1/2 dozen good sites will pop up. If not stick "sailplane" in to replace "glider" and then they'll pop up.
If it's all good at 4 inches then it'll be different but fine at 4.2. It's not THAT critical.
Good luck with a good model.
If it's all good at 4 inches then it'll be different but fine at 4.2. It's not THAT critical.
Good luck with a good model.
03-24-2003, 12:52 PM
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Thanks Bruce,
I did try a dive test on the first flight and it pulled out fairly quickly so I added a small weight to the rear of the fuz. This gave a better result in that it still pulled out of the dive but quite slowly.
I will be shifting the C of G back bit by bit until it gets twitchy.
I'll also have a look at the web sites you recommend.
Safe flying,
I did try a dive test on the first flight and it pulled out fairly quickly so I added a small weight to the rear of the fuz. This gave a better result in that it still pulled out of the dive but quite slowly.
I will be shifting the C of G back bit by bit until it gets twitchy.
I'll also have a look at the web sites you recommend.
Safe flying,
