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Official Freewing 90mm F-15C Eagle Thread

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  • shortround91
    replied
    Another successful day flying the F15 not a scratch seems like 106 is all she’s gonna get other than steep dives. Super happy with this plane even more forgiving than the J-10 on grass, gets a little hard to see up there but what a amazing sound it has
    Attached Files

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  • shortround91
    replied
    Just got to speed test my new 90 F15 today she’s all stock exception FW twin burner, running SMC hivlt 53-4600 packs getting 3-4 min flights. She’s so forgiving to fly not as fast as my J-10 but not bad either
    Attached Files

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  • davegee
    replied
    Originally posted by Hugh Wiedman View Post

    Interested in how the F15 performs with the SMC. Good luck!
    Hi Hugh: I just got back from the field. I have flown the SMC battery on my T-33 yesterday, and one flight on my F-15C this morning. I started near the very beginning of the runway and went to full power for takeoff right away. It accelerated pretty well, and sorta lifted off by itself with plenty of runway to spare. Once I got the gear up, the plane still seemed to be a bit "doggy" and I didn't try any maneuvers except for a bunch of passes at about 80 percent power. It still definitely lags behind planes I have like the F-18 and the T-33. I did have an issue with the right gear wheel hanging up on the wheel well (these are 60mm wheels and electric brakes) so it was less than perfect aerodynamics for the flight. I think probably the biggest issue I have is the altitude that I fly at, and the Density Altitude, which makes it worse. I only fly in the early mornings when the air is smooth and it is relatively cool. If I was flying at sea level, I would bet the performance would be much better. But I can live with what I have flying at my home field.

    It still comes around nicely for landing in a high-alpha pitch attitude perfect for landing. Brakes work great and there was no damage to the plane on its 3rd flight.

    I like what I've seen with the SMC batteries, and think I'll order at least one more of these for further evaluation. It is a bit smaller, slightly heavier than the Admiral batteries on my scale, but with the tight space of a plane like the F-15 for batteries, anything smaller is good, and I think the performance is probably better than the Admirals. I also like the pricing, too!

    Thanks for recommending these batteries. I could see slowly transitioning to these over the Admirals down the road.

    Happy flying!

    Cheers

    Davegee

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  • Hugh Wiedman
    replied
    Originally posted by davegee View Post
    I took my F-15C Eagle out for its second test flight early this morning. Nice time to fly, cool, and light winds. I recently purchased a SMC 6S 5000 MaH battery that Hugh Wiedman had suggested I give a try, since my last flight with the Eagle was pretty doggy. I always fly my T-33 first as a weathership before taking up a more valuable plane like my F-18, F-4, F-15, or B-2 Spirit. I brought the new SMC battery with me, but didn't feel comfortable making its first flight in my new F-15, so I put it into the T-Bird to see how it went.

    My thoughts were that performance improved with the SMC battery in the T Bird. I don't have empirical evidence to back that up, but it did seem to fly with more authority and at a lower power setting. It is also a bit smaller size than the comparable MRC Admiral batteries, so that was a good test of the battery before I put it in one of my other jets.

    I used a pretty new Admiral 6S 5000 MaH battery for my second flight of the F-15. I have installed a new 12 blade fan and the stock inrunner motor that is currently sold with F-15 kits. I do have a little extra weight with the JP Brakes and wheels and a simulated afterburner in the tail.

    Takeoff was normal when I started near the approach end of the runway for a full run at our approximately 500 foot long runway. Still, it took up much of the runway to take off. The whole flight was better than the first with the outrunner motor and 9-blade fan I had on the first flight, but still, I'd have to say "pretty doggy." (My field elevation is 5,000 feet MSL.)

    Next flight I will use the new SMC battery to see if that helps its "dogginess" a bit. It's still a fun plane to fly, but even my T-33 totally outclasses it in performance at this time.
    Interested in how the F15 performs with the SMC. Good luck!

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  • davegee
    replied
    I took my F-15C Eagle out for its second test flight early this morning. Nice time to fly, cool, and light winds. I recently purchased a SMC 6S 5000 MaH battery that Hugh Wiedman had suggested I give a try, since my last flight with the Eagle was pretty doggy. I always fly my T-33 first as a weathership before taking up a more valuable plane like my F-18, F-4, F-15, or B-2 Spirit. I brought the new SMC battery with me, but didn't feel comfortable making its first flight in my new F-15, so I put it into the T-Bird to see how it went.

    My thoughts were that performance improved with the SMC battery in the T Bird. I don't have empirical evidence to back that up, but it did seem to fly with more authority and at a lower power setting. It is also a bit smaller size than the comparable MRC Admiral batteries, so that was a good test of the battery before I put it in one of my other jets.

    I used a pretty new Admiral 6S 5000 MaH battery for my second flight of the F-15. I have installed a new 12 blade fan and the stock inrunner motor that is currently sold with F-15 kits. I do have a little extra weight with the JP Brakes and wheels and a simulated afterburner in the tail.

    Takeoff was normal when I started near the approach end of the runway for a full run at our approximately 500 foot long runway. Still, it took up much of the runway to take off. The whole flight was better than the first with the outrunner motor and 9-blade fan I had on the first flight, but still, I'd have to say "pretty doggy." (My field elevation is 5,000 feet MSL.)

    I got one surprise on my first attempt at landing when I saw that one of the main gear had not deployed. I went around, recycled the gear, and the second time I got a nice landing in a pretty high-alpha attitude like the real planes. Brakes worked great and I'm glad I have them.

    Next flight I will use the new SMC battery to see if that helps its "dogginess" a bit. It's still a fun plane to fly, but even my T-33 totally outclasses it in performance at this time.

    I'll attach a pic after today's flight.

    Click image for larger version

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  • davegee
    replied
    I have flown one flight on my ARF+ F-15C Eagle. I had an old 90 mm fan on an outrunner motor, and an ESC from a crashed F-4.

    It was definitely heavy and underpowered (also I fly at 5,000 feet MSL). I have an order in for an upgraded ESC, inrunner motor and 12 blade fan. Should be here next week to install.

    My main question is to anyone out there: do you use a flap/elevator mix on your airplane when at takeoff and full landing flaps? I didn't see any place in the instruction book about adding a mix, but it was very long to takeoff on the maiden, and had to pull it off the runway at the end to get it airborne. CG was right on the button.

    Thanks for any ideas or comments.

    Davegee
    Last edited by davegee; Jun 2, 2024, 10:41 AM. Reason: corrected typo: I installed and old OUTRUNNER motor and 9 blade fan and ESC. The new one will be an INRUNNER and 12 blade fan and 120 amp ESC.

    Leave a comment:


  • Gravythe clown
    replied
    Originally posted by Fury3 View Post

    If you don't mind me asking, where did you get the F-18 nozzles? I can't seem to find them on Motion's site. The EX is my favorite version of this bird.
    I get them from a friend that had crashed theirs. Try putting up a wanted thread in RCG.

    Gravy

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  • Fury3
    replied
    Originally posted by Gravythe clown View Post
    Yep I love my F-15 now. As DCORSAIR said, I changed out to the new 1960 12 bld unit. That helped get it to the close to the 100 mph range the real magic came from modifying the exhaust duct. There are 3D print files for inserts out in the forums if you look but I when a different route.
    I got a set of F-18 nozzles and bashed them together with the F-15 nozzles. End result is my F-15 is now a F-15EX and holds its own to the likes of the F-5 and Vulcan now.

    Gravy
    If you don't mind me asking, where did you get the F-18 nozzles? I can't seem to find them on Motion's site. The EX is my favorite version of this bird.

    Leave a comment:


  • SanExup
    replied
    dariobrit Ambitious project! Nice work!

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  • Elbee
    replied
    dariobrit , WOW, what a project and what a unique subject. Bravo Zulu, Sir. And welcome to Hobby Squawk! Great to have more innovators onboard. Best, LB

    Leave a comment:


  • dariobrit
    replied
    Hi there! I present you my project of my favourite F-15 ever made... the F-15 ACTIVE 😎

    As the big scale one, it uses F-18 elevators as canards; taken from the Freewing F-18 90mm. The servo mechanism is so well done that is very small size making it a perfect fit for the very little room the F-15 has in front of the wing.
    Made a 3d printed piece with the 20 deg angle, carved all the necessary foam to make it fit. Also, notice the 2 extra 3d pieces that actually holds the mechanism from the top (even though it's epoxyd in).🤩

    The interesting thing was the performance in the air. If you see videos of how the canards work on this plane it will blow your mind! Clearly they're controlled by a computerized system as it doesn't make any sense it's behaviour.😲

    Back to the project. No idea about the CG is gonna be or Canards neutral position, the first flight was trully a mystery but I gave it a try for the sake of humanity. Upon rotation, the plane did a Cobra, canard authority was enough to bring it to level, but it was impossible to fly and pancaked off the runway (unfortunately not caught in camera). That was my best save ever! I saw it completely destroyed...😬😬😬

    With the extra 160gr weight of the canards system in front of the CG, in order to achieve stock CG I've elimitated the airbrake (I rarely used it anyway) to move the battery all the way back, and removed the nose weight. ALL WRONG! CG on canards planes should be way forward, almost behind the canards.

    So, 2nd flight, battery all the way forward + canards in negative attitude (as the real one!). Managed to do 2 successful flights, but still CG had to be moved more forward.😃

    As the real thing canards behaviour was impossible to achieve, I decided to go for a standard canard system. Moved all the electronic back to where the airbrake was, and batteries all the way forward (did I mention I'm running on 7S?), so the canards can be almost leveled to the wing (also restored the 20gr on the nose and added an extra 100gr above the gear well). WHAT A BEAUTY FLYER!!! And the looks is badass! 😈😈

    CG ended 35mm ahead of the stock wing marking (still I feel it need a little more forward).

    With the paint scheme done and only decals to be done, here's a successful flight (working on getting better focus) and some pics. Enjoy!




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    Attached Files

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  • Gravythe clown
    replied
    Thanks.
    Speed and it has better thrust to weight. the F-5, Mirage 2000 and Vulcan are rockets. even before this new 2150KV came out. The F-5 and Vulcan I raced where broth bought around a year ago so they don't have the new 2150's.
    This video is hard to see but you can get the jist of it. Race actually starts around 1:50 mark as we had to wait for the 3D guy to land because he's all over place.



    Gravy

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  • SanExup
    replied
    Gravythe clown Holds it's own with the F5? In terms of speed and thrust to weight?
    I just got an F5 as turkey day, prezent to myself, with the new motor/ esc. I.kept reading that it's a missile, and it's a classic, I didn't want to miss out.

    Nice work.with the nozzles!

    Leave a comment:


  • Radar-Guy
    replied
    ‚Lazy man‘ inserts

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  • Gravythe clown
    replied
    Delete double post

    Gravy

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  • Gravythe clown
    replied
    Yep I love my F-15 now. As DCORSAIR said, I changed out to the new 1960 12 bld unit. That helped get it to the close to the 100 mph range the real magic came from modifying the exhaust duct. There are 3D print files for inserts out in the forums if you look but I when a different route.
    I got a set of F-18 nozzles and bashed them together with the F-15 nozzles. End result is my F-15 is now a F-15EX and holds its own to the likes of the F-5 and Vulcan now.

    Gravy
    Attached Files

    Leave a comment:


  • DCORSAIR
    replied
    Originally posted by bylawes View Post

    I would love to know what mods your friend made. Thanks!
    Okay, if he sees your post he will jump in I'm sure, he posted a few posts up, Gravy the Clown, look back on this page and you will see his mods, I know he put the FW 90mm F-18 exhaust nozzles on the F-15, I will let him tell you what he does so I don't get it all wrong....

    Leave a comment:


  • bylawes
    replied
    Originally posted by DCORSAIR View Post

    I would keep it, it flies great, yes it's heavy and flies heavy but you will enjoy if you fly it scale, my buddy put the new 90mm fan unit in it and modified the exhaust nozzle, he says it flies so much better and faster too.
    I would love to know what mods your friend made. Thanks!

    Leave a comment:


  • DCORSAIR
    replied
    Originally posted by bylawes View Post
    Howdy All. I just ordered the F-15, but then I had a friend tell me this bird is way overweight and underpowered. He said it's nearly 3 pounds heavier than other planes with the same power system. I looked at the specs and it seemed like it was of similar weight. I don't fly crazy, I just like stuff that looks scale and flies well getting up and down. Should I keep it or send it back for something that doesn't require a lot of modifications to get it to fly well. Thanks!
    I would keep it, it flies great, yes it's heavy and flies heavy but you will enjoy if you fly it scale, my buddy put the new 90mm fan unit in it and modified the exhaust nozzle, he says it flies so much better and faster too.

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  • SanExup
    replied
    I've actually seen it fly well. I don't have one but a friend does. I can't comment on it not flying heavy but after watching him fly it a few times, it looks like a fun one to fly. Takeoffs and landings were smooth. Inverted fligh, easy. He flew it stock. I wonder what the newer power system would do for it.

    Also, I would think 8s would be the wrong direction weight wise.

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