Originally posted by crxmanpat
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Official Freewing 90mm F-4 Phantom II Thread
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Originally posted by RickVB View Post
I ended up using this stuff from Home Depot, which was flatter (deader? :)) than the Minwax clear matte I had been using. I used pretty much a full can for this model, which is cheaper than a 12 pack of Testers Dullcote.Pat
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I tried performing a search but the search tool here leaves a lot to be desired and I came up empty.
I'm read to maiden tomorrow but I'm having a little trouble with the CG. The plane is heavy enough that it's hard for me (or my wife) to hold it to see if it balances.
From what I can tell if I push my Admiral 5000 as far forward it seems to be close, I really cannot tell if it's nose or tail heavy. If you've flown yours with Admiral batteries could you post a pic of the battery in the plane or tell me where you placed it?
EDIT: I see where Pilot Ryan posted this I cut the feet off of my pilot so I can use the forward portion of battery deck. Plane flies fine either way, its the slowing down where you benefit from the forward cg. I spun mine in twice with full flaps being too slow on base before I cut the feet off and moved cg forward a bit. I'm flying the older Admiral 5000
Hmmmmm, perhaps I'm a little tail heavy after all. Maybe I should hold off on the maiden until I can get this better balanced.
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Originally posted by Drill Sergeant View Post
Hey Sky Wolf are you coming to Joe Nall this year as well? Looking forward to meet you if so. Following your comments on Squawk. :Cool:
Hoping to meet you as well my friend!
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Originally posted by dkalwishky View PostI tried performing a search but the search tool here leaves a lot to be desired and I came up empty.
I'm read to maiden tomorrow but I'm having a little trouble with the CG. The plane is heavy enough that it's hard for me (or my wife) to hold it to see if it balances.
From what I can tell if I push my Admiral 5000 as far forward it seems to be close, I really cannot tell if it's nose or tail heavy. If you've flown yours with Admiral batteries could you post a pic of the battery in the plane or tell me where you placed it?
EDIT: I see where Pilot Ryan posted this I cut the feet off of my pilot so I can use the forward portion of battery deck. Plane flies fine either way, its the slowing down where you benefit from the forward cg. I spun mine in twice with full flaps being too slow on base before I cut the feet off and moved cg forward a bit. I'm flying the older Admiral 5000
Hmmmmm, perhaps I'm a little tail heavy after all. Maybe I should hold off on the maiden until I can get this better balanced.
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Tonight I made the maiden flight on my 90mm Freewing F-4 Phantom.
My three flights tonight were on low rates per the manual with 30% expo. This flight had recommended flap to elevator mix which I found out was not enough, flights two and three I doubled it and found it flew much better that way with the flaps deployed as little to no elevator was needed with the flaps down.
At the 1:30 mark you'll see something depart the right wing, it was one of the external fuel tanks although we called them bombs in the video by mistake. The plane was really squirrely with all the drag on the left side.
I was anxious to get it on the ground so I came around and was fast and landed down wind. Because I didn’t have enough UP elevator mixed in with the flaps you’ll see it porpoise and finally land, you’ll also notice that the other tank came off so I decided to go right back up. Perhaps I did not have them firmly attached with the magnets. I felt like I was fighting the elevator and had to give a bunch more up trip. I thought that was because the tanks were off but after landing I realized I never raised the flaps and since I didn’t have enough mix in I was getting the nose down pitch.
I did have a few clicks of up trim on flight one, for flights two and three I moved the battery back a few millimeters and she flew with zero elevator trim. I cannot tell you where my CG is, I went with the battery placement that was given to me by a fellow modeler. All flights were with the older style Admiral 5000 6S batteries. Flight one had the battery as far forward as it would go, flights two and three were with the same battery back 3-5 millimeters and that’s where I liked it and I was able to remove all elevator trim.
In summary make sure you use the flap to elevator mix (I’d double it), make sure the neutral position for the elevator is 8mm up as the manual states. I had ZERO aileron, rudder and elevator trim, she flew straight and true.
I cannot wait for more nice weather to really wring this plane out, she’s a keeper!
Thanks to Connor Johnson for taking the video for me.Tonight I made the maiden flight on my 90mm Freewing F-4 Phantom. My three flights tonight were on low rates per the manual with 30% expo. This flight had re...
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Good going Dave! Nice maiden and GREAT job on the save on the first landing...Yikes your approach put MY heart in my throat, I could only imagine what yours was doing! LOL
Is yours the 6S? I've decided to go with the 6S PNP even though I heart the 12-blade WOOSH so much...But I've heard enough from Alpha and the other test pilots that the 9-blade is the best blend of efficiency and performance. How does it sound in person? I never go off of video as I know it always sounds better in person.
Again, good job! :Cool:My YouTube RC videos:
https://www.youtube.com/@toddbreda
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Originally posted by dkalwishky View PostTonight I made the maiden flight on my 90mm Freewing F-4 Phantom.
My three flights tonight were on low rates per the manual with 30% expo. This flight had recommended flap to elevator mix which I found out was not enough, flights two and three I doubled it and found it flew much better that way with the flaps deployed as little to no elevator was needed with the flaps down.
At the 1:30 mark you'll see something depart the right wing, it was one of the external fuel tanks although we called them bombs in the video by mistake. The plane was really squirrely with all the drag on the left side.
I was anxious to get it on the ground so I came around and was fast and landed down wind. Because I didn’t have enough UP elevator mixed in with the flaps you’ll see it porpoise and finally land, you’ll also notice that the other tank came off so I decided to go right back up. Perhaps I did not have them firmly attached with the magnets. I felt like I was fighting the elevator and had to give a bunch more up trip. I thought that was because the tanks were off but after landing I realized I never raised the flaps and since I didn’t have enough mix in I was getting the nose down pitch.
I did have a few clicks of up trim on flight one, for flights two and three I moved the battery back a few millimeters and she flew with zero elevator trim. I cannot tell you where my CG is, I went with the battery placement that was given to me by a fellow modeler. All flights were with the older style Admiral 5000 6S batteries. Flight one had the battery as far forward as it would go, flights two and three were with the same battery back 3-5 millimeters and that’s where I liked it and I was able to remove all elevator trim.
In summary make sure you use the flap to elevator mix (I’d double it), make sure the neutral position for the elevator is 8mm up as the manual states. I had ZERO aileron, rudder and elevator trim, she flew straight and true.
I cannot wait for more nice weather to really wring this plane out, she’s a keeper!
Thanks to Connor Johnson for taking the video for me.
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Originally posted by dkalwishky View PostTonight I made the maiden flight on my 90mm Freewing F-4 Phantom.
My three flights tonight were on low rates per the manual with 30% expo. This flight had recommended flap to elevator mix which I found out was not enough, flights two and three I doubled it and found it flew much better that way with the flaps deployed as little to no elevator was needed with the flaps down
Neutral CG is so important for good behaviour on almost any model. I'm sure there are exceptions to that, but they are few. Nose heavy is less of a pain than tail heavy in most cases, sure, and it makes sense to always start a bit conservative, but in the end, a neutral CG should always be the goal IMO.
Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
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Good save, Dkalwishky! Smart decisions.
You mentioned not knowing what CG you were flying at... would you please check and post that for us? I see you've got other recommendations in your review but the CG is an important reference point for context.
I'm glad you liked the stock 9B 6s' sound. I hope you get better weather sooner!
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