Official Freewing 90mm F-4 Phantom II Thread

[Hugh Wiedman]

"Maiden " today with the FMS 1850 ....to be honest, compared to the Freewing 1835 ........nothing in it. The grass is longer now than the last outing with the latter which might make a difference but in the air a difference was not apparent. HRB 6000 cells all above 3.8 so no change there either. So there we have it . What it does have going for it is a very nice sound.........Time wise I just stuck to my normal 3 1/2 min. from wheels up to wheels down. You'll be glad Hugh....saved you a lot of money !!

Thanks for the info, was wondering about that fan as well. So now for my next "pet recommendation", the SMC batteries. I'm not sure if you can get these overseas and if you can, they may be price prohibitive, but after testing tons of batteries and literally going broke doing so, I've settled on the SMC's being bar far the best. Compared to Admirals, Spectrums, Roaring Tops, Venoms, and even HRB's, the SMC's test out with the highest C (despite what labels say) and the most consistent and higher individual cell amps. Their batteries test out to the labeled C, which is higher than any 100C labeled competitor. HRB's aren't bad, in fact better than most I've tried, but not as good as SMC. For that higher actual C, they still don't weigh as much as you would expect. For example, comparing the SMC graphene 6200 40C (weight 814 gr) to the HRB 6000 50-C100C burst (weight 830 gr) I've tested the 2 batteries with that 12 blade 1835 Kv fan:

HRB 6000: Actual C (Progessive IR Meter) at 34C
Power Draw fully charged at 100% throttle: 123.2 Ah and 2782 Watts

SMC 6200: Actual C at 41C
Power Draw fully charged at 100% throttle: 127.6 Ah and 2947 Watts

I'm getting 4 minutes now with the SMC in both F-4's and come down in the 3.8 range as well. I think I'm getting a bit more time since I'm at full throttle less to achieve the same flight parameters (on grass as well), but can't guarantee that since I really have no idea what I'm doing out there, flying by the "seat of my pants", and those pants aren't always dry!

[davegee]

"Maiden " today with the FMS 1850 ....to be honest, compared to the Freewing 1835 ........nothing in it. The grass is longer now than the last outing with the latter which might make a difference but in the air a difference was not apparent. HRB 6000 cells all above 3.8 so no change there either. So there we have it . What it does have going for it is a very nice sound.........Time wise I just stuck to my normal 3 1/2 min. from wheels up to wheels down. You'll be glad Hugh....saved you a lot of money !!

glad you got it down safely on the maiden and got some good information on that motor's performance for comparison.

Cheers

davegee

[locharrow]

"Maiden " today with the FMS 1850 ....to be honest, compared to the Freewing 1835 ........nothing in it. The grass is longer now than the last outing with the latter which might make a difference but in the air a difference was not apparent. HRB 6000 cells all above 3.8 so no change there either. So there we have it . What it does have going for it is a very nice sound.........Time wise I just stuck to my normal 3 1/2 min. from wheels up to wheels down. You'll be glad Hugh....saved you a lot of money !!

[locharrow]

Rain and wind has prevented "maiden" with the FMS 90 since installed but managed a few fast runs yesterday (no flights because of a few dog walkers) seems very promising .....

[davegee]

davegee the existing stock 130 amp ESC is fine for either the 12 or 9 blade inrunner and I suspect would be OK for the FMS fan as well. Considering you have the 1835 Kv outrunner in it already, then I'm not sure there will be that much of an upgrade. I got mine when they first came out and both had the 9 blade 3748-1750 Kv outrunner (same fan in the older F-18 as well), so for me on the F-4's and F-18's, going to a 12 blade 4068-1835 Kv inrunner was a fairly substantial upgrade. You may be better off not wasting money on a somewhat minimal upgrade if you're already happy with the way it flies.

Thanks, Hugh. I'll certainly consider an upgrade down the line. I think one problem I have is that I am at over 5,000' MSL, and I know that that causes some degradation in performance versus sea level, probably with whatever I put in it. I just don't know if any extra punch from the upgraded fan will be enough to justify the cost.

I'm having to stand down from doing any flying and the maiden of the new F-4 I just got due to the flap switch breaking off on my DX18 transmitter. I didn't feel comfortable trying to work the flaps with the nub of the switch sticking out of the transmitter, especially for a high performance jet that will command all my attention, so I shipped it back to Horizon to get a new D switch put in. So, I'll have to wait probably until sometime next week to fly again. But I should get a good idea if the F-4 needs some more power for my field elevation, and my flying style once I can fly again. We'll see.

Appreciate all your good comments.

cheers

davegee

[Hugh Wiedman]

davegee the existing stock 130 amp ESC is fine for either the 12 or 9 blade inrunner and I suspect would be OK for the FMS fan as well. Considering you have the 1835 Kv outrunner in it already, then I'm not sure there will be that much of an upgrade. I got mine when they first came out and both had the 9 blade 3748-1750 Kv outrunner (same fan in the older F-18 as well), so for me on the F-4's and F-18's, going to a 12 blade 4068-1835 Kv inrunner was a fairly substantial upgrade. You may be better off not wasting money on a somewhat minimal upgrade if you're already happy with the way it flies.

[davegee]

Thanks for the info, Hugh. This old 1835Kv outrunner is still in great shape, considering I used to fly it in an SEA scheme F-4 years ago that is now hanging in a hangar in Powell, WY for the CAP kids, and then flew a bunch with my plane that recently crashed due to my letting it get too far out, but was totally unscathed from that incident, to now in my new replacement F-4 that I had hoped to maiden this weekend. As luck would have it, the flap switch on my DX 18 broke off yesterday, still a nub of the spring sticking out of it. It does "work" but I would be foolhardy to try and maiden this F-4 with that goofy flap switch. So, tomorrow it gets shipped to Horizon for them to put a new "D" switch in, and I'll do the maiden when it gets back. The plane is fully ready to go, otherwise.

I think once I get the new F-4 all dialed in like before, I'll look into replacing the fan with what you recommended. We are at 5,000' MSL here, and I think there is a probably an appreciable decrease in power from what you probably find in the Miami area at sea level where you fly.

Do I need to change out the ESC or anything else if I go ahead and put the inrunner in place of my current fan?

Thanks,

Dave

[Hugh Wiedman]

For the time being, I just put all the old stuff from the last plane in this one that was still usable. I originally had the 6S outrunner which is adequate for my style of flying, but I think I'll probably go with a 6S inrunner down the road.

Which 6S inrunner do you recommend, again?

Thanks,

davegee

I put the FW 12 blade 1835 Kv inrunner in both of mine and it made a huge difference in the way it flew over the original 9 blade outrunner. I've put that fan in all of my 90 mm's and really like it (although it is a bit pricey ), but imagine the FMS fan locharrow put in is similar if not even better. The FW fan is a drop in fit requiring no modification. Can't say about the FW 9 blade inrunner as I don't have much experience with that one (did put it in my Stinger 90 when I swapped in the 12 blade in my 2nd Hornet), but it is considerably more economical. I'm sure I probably fly similar to you as I'm not a speed demon and rarely use full throttle, except on take-off. The big difference for me was in the take off distance on grass now less than 70 feet and it powers through any vertical maneuver like Cuban 8's and Split S's without missing a beat. The old stock outrunner seemed to labor a bit at the top end of a vertical maneuver and occasionally got too slow causing an early wing stall and a "what the hell" moment. It also powers through slower base to final turns without getting a little loose and can recover quicker if you need it. There's not much difference in flight time though and I'm getting 4 minutes on an SMC 6200 where I used to get 3:40 on the outrunner. But you can tell the difference in the flight as it is a lot smoother and holds your desired air speed easier. Just my 2 cents.

[davegee]

Best of luck with that flight, Locharrow!!👊

[locharrow]

That's the FMS 90mm 12 blade installed in the "old" F4 ...bit of foam sculpting required but no big deal. Sounds a bit louder (in a good way) than the Freewing 1835kv motor. Unfortunately only just finished and it's too dark to "maiden". If it's a flying day tomorrow I'll give it a whirl....fingers crossed !!

[davegee]

Excellent work! What fan do have in this one?

For the time being, I just put all the old stuff from the last plane in this one that was still usable. I originally had the 6S outrunner which is adequate for my style of flying, but I think I'll probably go with a 6S inrunner down the road.

Which 6S inrunner do you recommend, again?

Thanks,

davegee

[Hugh Wiedman]

On the "final assembly line" at home, waiting for better weather to do the maiden. I took a lot of the "guts" out of the crashed previous plane, which was painted identically to this one. This plane has the Chris Wolfe Afterburner lighting system, and JP brakes to help stay on the runway where I fly from. Have started some panel line shading, exhaust streaking, and some judicious use of some oil and grease acrylics on various parts of the model, like flight controls hydraulic cylinders, etc.

Excellent work! What fan do have in this one?

[davegee]

On the "final assembly line" at home, waiting for better weather to do the maiden. I took a lot of the "guts" out of the crashed previous plane, which was painted identically to this one. This plane has the Chris Wolfe Afterburner lighting system, and JP brakes to help stay on the runway where I fly from. Have started some panel line shading, exhaust streaking, and some judicious use of some oil and grease acrylics on various parts of the model, like flight controls hydraulic cylinders, etc.

[davegee]

DG, Nice detail work in the offices, Sir. Best, LB

Thanks, LB!

Best,

davegee

[Elbee]

I'm portraying an N model, circa 1975. This is VF-84, the Jolly Rogers.

DG, Nice detail work in the offices, Sir. Best, LB

[davegee]

I had a lot of fun with my last 90mm Freewing F-4, but unfortunately, I lawn-darted it a couple of months ago. Totally my fault, lost spatial orientation turning from base to final leg when I had taken it out way too far. I think it stalled and went straight in. I was able to harvest a lot of the plane, and put them in a new F-4 I just got a few days ago. This will be same paint scheme, but doing a few more details on the plane this time. I'll attach some pics of the new cockpit and the pilots glued in before I attach the canopy. I'm portraying an N model, circa 1975. This is VF-84, the Jolly Rogers. I'm looking forward to the maiden probably within the next several days.

[Elbee]

Looks very charm and powerful

AR, Welcome to Hobby Squawk. Glad to have you onboard. Best, LB

[alfarogue]

Looks very charm and powerful

[Elbee]

Hence my comment about how skilled the 'chase plane pilot' must be. Dittos all around. Best, LB.

[themudduck]

That was an amazing flight. I especially like how well the plane flew with full down elevator being held all the time....

I am a bit taken aback by how many people here (and on Youtube as well) think its a real flight video. Locharrow broke the code.

Hey, I have a brand new F4 in the box for sale for $39. Batteries are not included. (The rudder works properly)