Official Freewing 90mm F-15C Eagle Thread

[smittymgs]

Rcjetdude

I assumed it was something I screwed up (cg,control throws, sub trim etc) however this one has me stumped. I know it is a good flying aircraft but I have checked and rechecked everything. The only thing I can think of is put it on a diet, take the heavier wheels with brakes off, change out the receiver for something else recheck everything again, weigh it and see where we are at. Maybe I will check the wing incidence. Is it possible one of the gear doors is causing drag? The odd thing was when I was full flaps, gear and SB it seemed fairly stable in the landing configuration. Now its a challenge to figure out the reason.

[RCjetdude]

Welcome to HobbySquawk and bummer smittymgs... I have not experienced anything like that on my F-15. It flies good, just a little heavy but no bad tendencies like you describe. Was it a brand new programmed model on your radio?

[smittymgs]

Ok experienced Freewing Eagle drivers. I cant figure this out. My F15 has flown twice, barely able to get it back on the ground in one piece both times. If I slow it down it starts rolling to the right to the point it is uncontrollable (I had to just roll rt gain speed in the dive to recover it). Even after trimming out it still snaps right. and very unstable.. Right ail input and it snaps over. If the speed is kept high flies ok still crazy roll sensitive, several times I had full left aileron input and until speed increased it was impossible to turn left.. Once I brought the flaps to position 1 it flew OK. With SB deployed and flaps full it stabilizes somewhat (landing was actually not bad). Here is the thing I cant figure out. After the first flight I checked and rechecked the control throws and they are spot on low rates.. Expo is 40% (the correct way). All control surfaces are streamlined with the wing and control throws are perfectly matched, elevators are spot on the required location, flaps are fully retracted. I cannot see any wing or fuselage or tail warp or abnormality. I have checked the cg multiple times both with a Xicoy cg machine as well as a visual check on a cg stand and it checks ever so slightly nose heavy (basically balanced on the forward cg) at the prescribed location ( I believe its 118mm but whatever it says in the manual). I have numerous freewing jets (F22x3, F16X2,Avanti) and have had great success with all of them and am an experienced pilot but for the life of me I cannot figure it out. the only changes I have made is it has electric brakes and a spektrum AS3X receiver ( I have the stabilization turned off). Seems like it flies much better with the flaps down but I should not have to maintain that sort of speed to keep it upright (too Heavy?). Any thoughts?

[e4dragongunner]

Gotta Build me a drone FPV Rig.... specifically for this purpose!

[simonslim]

Thanks guys, hoping to stretch the flight envelope this weekend and do some formation flying with my buddy's F22.

[gooniac33]

Maidened my F15 yesterday, wow, I love it. Just did circuits to get used to it [it's my first edf jet] and it is sooooo smooth. All three flights were full power take offs then down to half throttle cruising.
Three and a half minute flights, and used just over 60% on my 4500mah 6s packs. More than happy.
https://www.youtube.com/watch?v=52s4jDYCf9g

WOW!!!! I really love that perspective! Great video!!! Flying over the water is really cool too... thanks for sharing and great flying!

[Walo]

Walco, glad you are on board!!!! Welcome our Brother!!!!!! ;):Cool:

Thanks Hardway

My F15 ARF plus will arrive tomorrow Wednesday from MRC Europe as I am living in Switzerland. I am Pretty much excited about it but it still will take me some time to get the F15 up in the air (Need to order and install power system)!

Meanwhile I am flying the MIG, Mirage 2000, Futura and Avanti and hope all will be going well!?

[Aros]

Outstanding video! Well done and congrats!

[Alpha]

Maidened my F15 yesterday, wow, I love it. Just did circuits to get used to it [it's my first edf jet] and it is sooooo smooth. All three flights were full power take offs then down to half throttle cruising.
Three and a half minute flights, and used just over 60% on my 4500mah 6s packs. More than happy.
https://www.youtube.com/watch?v=52s4jDYCf9g

I just posted on your channel. Excellent work to both Simons!

[DCORSAIR]

Wow, nice video, looked like a great flight as well, love those over the water shots.:Cool:

[simonslim]

Maidened my F15 yesterday, wow, I love it. Just did circuits to get used to it [it's my first edf jet] and it is sooooo smooth. All three flights were full power take offs then down to half throttle cruising.
Three and a half minute flights, and used just over 60% on my 4500mah 6s packs. More than happy.

https://www.youtube.com/watch?v=52s4jDYCf9g

[DCORSAIR]

I have the F-4 also, it's okay, not my favorite but it does fly well, I put the 1680kv in it, short flight times but I have a 1835kv to try in it, just haven't had time to change it out and see if it is better. Haven't flown the F-22 yet, I think it's ugly so I haven't talked myself into it yet, would like to fly one though for fun. The F-15 is hard to beat with the 1835 in it, not much better than the 1680, just a little bit better performance.

[Peteflys]

Wow, that was a bad crash, sorry to see that.

I think I read that the F-18 wasn't going to be ready any time soon, it's just going into production sounds like.

Yeah, that was only the second time I had to say "I GOT NOTHIN!" as I watched it turn in nose first. But hey, they all have an expiration date, right? And I did get to fly it some. It sure was a bit hit with most of the guys at the field. And you are correct, it probably will be several months before the F-18 is available. I may just go ahead and pull the trigger on the F-22, or maybe the F-4. I still have an A-4 and an F-86. They are both a blast to fly. I picked up a used SU-35 from a guy at our field. Still haven't put it in the air yet. Had a few things to fix first, but just about ready to go.

[Hardway]

Thanks Alpha

You have absolutely convinced me about using the newer 6s inrunner power system.

Walco, glad you are on board!!!! Welcome our Brother!!!!!! ;):Cool:

[Walo]

Thanks Alpha

You have absolutely convinced me about using the newer 6s inrunner power system.

[Alpha]

Dear Alpha

I am about to order the F15 ARF plus from MRC and wonder whether you could give me your experience with the all new Freewing 6s 4068/1835kva as compared to the older 1680kv high performance edf. I am inclined to installing this new unit as I find the power numbers quite attractive.

Hi Walo, the newer power system will fly your F-15 a bit "better" overall. Better is a subjective term of course, but in general you can expect a nice flying experience and balanced power, acceleration, and cruising speed compared to the older setup. If you have flown the original PNP, you'll notice a difference. But if you're flying your 1835kv setup from the start, then I can't give you a meaningful frame of reference over the internet except to say I'm confident you'll enjoy it. Thank you for the opportunity to earn your business!


Speaking of Eagles, here is photo I took the other day of "Baldie", which is the first production F-15 kept at the factory. It is used as a master reference here at the factory, so each time we produce more F-15s the team takes it off the shelf and reviews decal placement, fit, OofO, etc. She's an old bird, but she's served us well over the years.

[gooniac33]

The F4 is a 80, have plenty of 70’s

womder if FMS makes a 90mm. Their units seems more efficient? F4 for example, yea it’s a smaller bird (eflite) than FW but I got 6min out of a 5000 just cruising

Oh yeah! Forgot about that. The F-4 and F-15 should kinda land about the same. You should be fine with the F-15. And yes there is an FMS 90mm out there and its not too hard to fit into the F-15. Its not going to make it much faster but it will for sure help with weight and also increase its flight times by 1 min on the same 5000 battery. It requires less throttle to cruise which but still moving along really well. It works great in this plane so long as you aren't expecting it to go all that much faster than it does stock. I used one in my 90mm F-104 and it is much easier to fly, lighter weight and the batteries are barely warm after flying. Stock the batteries would take a beating!!

[thisguy65]

Yeah I gathered that. Do you have any 80mm? If not then I wouldn't say the F-15 is a good place to start for a larger one. The newer set ups will make it easier to fly but I am not seeing the flight times getting any better unless you use some of the ligher 6000+ batteries that are out there now. I am sure that with the stock set ups and the 6s 50c 6200 that I have been using that a stock powered bird would get at least 3.5-4 min flying time with good throttle management. The stock systems are pretty hard on batteries though...

The F4 is a 80, have plenty of 70’s

womder if FMS makes a 90mm. Their units seems more efficient? F4 for example, yea it’s a smaller bird (eflite) than FW but I got 6min out of a 5000 just cruising

[gooniac33]

Not as a first jet, been flying jets for a new months now. Just as a first 90mm. sorry if there's any confusion on my end.


What are you guys getting flight time wise for the F-15. I picked up a E-flite F4 vs the FW mainly because of flight time.

Yeah I gathered that. Do you have any 80mm? If not then I wouldn't say the F-15 is a good place to start for a larger one. The newer set ups will make it easier to fly but I am not seeing the flight times getting any better unless you use some of the ligher 6000+ batteries that are out there now. I am sure that with the stock set ups and the 6s 50c 6200 that I have been using that a stock powered bird would get at least 3.5-4 min flying time with good throttle management. The stock systems are pretty hard on batteries though...

[gooniac33]

More flying this past weekend and lots of good flights to share!