Happy May peeps! Some of you will be flying this beauty THIS MONTH! :)
Official Freewing 80mm Avanti S Sport Jet Thread
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I procrastinated too long to get in on pre-order 1 but found a work around for it. ARF Plus and pull the fan, motor, ESC from my F-5 since I seldom fly it. Then a buddy of mine decided he wanted to buy the F-5 so I ordered the Mig 21 fan/motor/ESC set and had a few bucks left over. ;)
My YouTube Videos https://www.youtube.com/channel/UCrz...4Q-xrOOtP2C-8wComment
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Anxiously awaiting delivery of the Avanti S and A-10 as the weather here in NW Ohio is starting to shape up...
I have a question on the build video as to the use of the wing fences. I noticed in the video that they were not being installed and would like to know what the advantage of installing them or not installing them is. I don't remember seeing them installed on the plane in the flight videos either.
Thanks...Comment
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G'day tom. Most of the guys that have flown the avanti have said they didn't notice any difference with or without. The idea is to supply a little side force for stabilisation, though again it doesn't seem to need it. (Much the same as sfgs on a 3D plane, just smaller).Comment
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Personally I wouldn't be too quick to dismiss the installation of the air fences as they are more than just side force generators. At low speeds, which is one of the areas this jet excels at, the air fences keep the flow from "sliding" down and across the sweep of the wing which reduces low speed stall and provides better handling at lower speeds. I grant there is probably no difference at higher speeds, but they can make a big difference when landing especially if you have a short runway or don't like landing hot.Comment
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Great point!Personally I wouldn't be too quick to dismiss the installation of the air fences as they are more than just side force generators. At low speeds, which is one of the areas this jet excels at, the air fences keep the flow from "sliding" down and across the sweep of the wing which reduces low speed stall and provides better handling at lower speeds. I grant there is probably no difference at higher speeds, but they can make a big difference when landing especially if you have a short runway or don't like landing hot.Comment
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A good point for sure. However, although we know the aerodynamic nature of fences and how they help, supposedly real world testing of them on this jet hasn't been shown to provide any noticeable difference to pilot. I plan to do some testing with mine just for fun.Comment
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I would also like to think that Freewing did some testing themselves and provide them for a reason, especially given the size and shape of them. I will certainly do an A/B test as well but I would guess at a minimum the flaps will be more effective at low speeds given their outline.
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I think the primary reason they provided them would be for mostly aesthetic purposely because the Avanti jet is known the have them. The flaps definitely help this jet land slow, very slow. Ha-ha :Cool:
I would also like to think that Freewing did some testing themselves and provide them for a reason, especially given the size and shape of them. I will certainly do an A/B test as well but I would guess at a minimum the flaps will be more effective at low speeds given their outline.Comment
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I agree completelyPersonally I wouldn't be too quick to dismiss the installation of the air fences as they are more than just side force generators. At low speeds, which is one of the areas this jet excels at, the air fences keep the flow from "sliding" down and across the sweep of the wing which reduces low speed stall and provides better handling at lower speeds. I grant there is probably no difference at higher speeds, but they can make a big difference when landing especially if you have a short runway or don't like landing hot.
The wing may stall let's say 2mph slower with the air fences than without them. Just because someone flew without them and said they're not needed doesn't mean anything thing to me unless testing at stall speed proves otherwise. Cheers!Comment








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