Official Freewing 90mm F-15C Eagle Thread

[gooniac33]

Yes. Same series connector. For both the 2S-6S and 2-4S setups. Flew her again today for 5 flights and used the 2S-6S on first flight and 2S went to 9% and the 6S was at 54% @ 3mins. With good throttle management. Flew the other 4 flights with the 2-4S combo and got a good 4mins and batteries at 25% @ 3.79v. Better results from the 2-4S combo so I'll stick with that combo.
Side note: Do you connect your afterburners to the balance lead before you plug in to the ESC?

one of the batteries must have a bad connection of some sort. Or one pack has much less internatl resistance than the other... if the 2 4s packs are ok then it has to be the batteries or the connectors on the other set...

You can do it in any order you want. I always plug in the esc first and then the burner.

[Cape Jets]

Were you using the same series connector?

Yes. Same series connector. For both the 2S-6S and 2-4S setups. Flew her again today for 5 flights and used the 2S-6S on first flight and 2S went to 9% and the 6S was at 54% @ 3mins. With good throttle management. Flew the other 4 flights with the 2-4S combo and got a good 4mins and batteries at 25% @ 3.79v. Better results from the 2-4S combo so I'll stick with that combo.
Side note: Do you connect your afterburners to the balance lead before you plug in to the ESC?

[gooniac33]

Yeh I made sure all the batteries where the same age with some break in flights on them and same C ratings on the 6S and 2S. Connections are good and performance was good. But once again after about 6 flights the 2S was draining way too fast. Since I switched to the 2- 4S setup (HRB 5000mah 50C) about a 4-4:30 flight time and both batteries at same percentage and voltage (20-22% @ 3.7-3.8) left in the tank. Not sure why the 2S-6S combo didn't work, but the 2-4S work great.....

Were you using the same series connector?

[Cape Jets]

Whenever you run batteries in series its import that they are the exact same cells and the same age if you want any kind of consistency. The connectors are often overlooked as well. In the end the load doesn't care how the voltage is made so long as it is what the system requires. Any combo should yield the exact same flight times. I choose to use 2 4s packs to make 8s but others use 5s with 3s or 6s with 2s. The age, C and make does matter though!

Yeh I made sure all the batteries where the same age with some break in flights on them and same C ratings on the 6S and 2S. Connections are good and performance was good. But once again after about 6 flights the 2S was draining way too fast. Since I switched to the 2- 4S setup (HRB 5000mah 50C) about a 4-4:30 flight time and both batteries at same percentage and voltage (20-22% @ 3.7-3.8) left in the tank. Not sure why the 2S-6S combo didn't work, but the 2-4S work great.....

[gooniac33]

Well its warming up here on Cape Cod so I've had the Eagle out about 10 times so far. One thing that puzzled me was the batteries. When I ran a 6S with a 2S the 2S would bleed out energy way faster than the 6S and was only getting about 3mins flight times. When I switched to 2- 5000mah 50C 4S batteries the flight times are now 4:30 mins and both batteries at about 3.7 @ 30% left. I almost lost it on the 6S - 2S combo after the 2S ran out of juice and just ran on the 6S (which it didnt like at all) barely got her back in one piece. So is anyone else having the same issue with the 6S-2S combo?

Whenever you run batteries in series its import that they are the exact same cells and the same age if you want any kind of consistency. The connectors are often overlooked as well. In the end the load doesn't care how the voltage is made so long as it is what the system requires. Any combo should yield the exact same flight times. I choose to use 2 4s packs to make 8s but others use 5s with 3s or 6s with 2s. The age, C and make does matter though!

[C17loadmaster]

I have heard the exact opposite of that statement. Also, I run 6S+2S on my 8S planes. As long as they are the same exact batteries, with the only difference being the cell count, the ESC cannot tell the difference. The only thing I can think of is that either you have a bad connection somewhere, OR the 2S battery has seen more use than the 6S. It is important to keep the amount of cycles on the 2S batteries near the same as the amount of cycles on the 6S if you intend on using them paired together.

[ColtPilot]

Well its warming up here on Cape Cod so I've had the Eagle out about 10 times so far. One thing that puzzled me was the batteries. When I ran a 6S with a 2S the 2S would bleed out energy way faster than the 6S and was only getting about 3mins flight times. When I switched to 2- 5000mah 50C 4S batteries the flight times are now 4:30 mins and both batteries at about 3.7 @ 30% left. I almost lost it on the 6S - 2S combo after the 2S ran out of juice and just ran on the 6S (which it didnt like at all) barely got her back in one piece. So is anyone else having the same issue with the 6S-2S combo?

Not supposed to run it that way in the first place. Running two separate size batteries the 2s will deplete first every time. Always run the same size batteries together.

[Cape Jets]

Well its warming up here on Cape Cod so I've had the Eagle out about 10 times so far. One thing that puzzled me was the batteries. When I ran a 6S with a 2S the 2S would bleed out energy way faster than the 6S and was only getting about 3mins flight times. When I switched to 2- 5000mah 50C 4S batteries the flight times are now 4:30 mins and both batteries at about 3.7 @ 30% left. I almost lost it on the 6S - 2S combo after the 2S ran out of juice and just ran on the 6S (which it didnt like at all) barely got her back in one piece. So is anyone else having the same issue with the 6S-2S combo?

[Cape Jets]

Landing gear question? Has anyone changed out the front spring for the front nose gear? The reason I ask is my front gear seems to ride lower and bounces alot more since the 8S upgrade. Prob cuz of the added weight of the batteries. I think I need to stiffen up the front gear spring to reduce the bouncing effect for take-offs & landings.... Any ideas?

[DCORSAIR]

Here's a maiden video for everyone.

Great job and nailed that landing......

[Aros]

Nice maiden djmoose ! Thanks for sharing!

[djmoose]

Here's a maiden video for everyone.

[Cape Jets]

I am really interested in how this does for you in the F15. I am really wanting to try it in the 90mm Super Scorpion.

You get the EDF from RC-Castle?

Been stupid cold up hear so only got in 3 flights with the new 8S FMS set-up. (fingers frozen). Seems to have better climb rates and take off thrust was excellent. Not sure on throttle management yet, too little time in the air. I got the FMS from Banggood for only $112.00 with shipping. Shipping was a-little slow but no rush as winter project. Wont see the air again till its gets warmer up here. Flying with frozen fingers is not the best......

[JamesonC]

Upgrade completed on the F-15 to 8S with the FMS 90mm and Freewing 150amp 8S ESC.... No issues setting up ESC but question. When you hook up the 2S then the 6S will you hear 8 beeps from the ESC? Not sure if the ESC is seeing the 8S system. It throttle ups fine and seems fine , but not sure.... Thoughts?

I am really interested in how this does for you in the F15. I am really wanting to try it in the 90mm Super Scorpion.

You get the EDF from RC-Castle?

[gooniac33]

Since you have the same set-up in your F-16 how do you hook up the batteries? Do you use the 6S & 2S combo? Do you plug both in to the series connector then to the ESC? Or do you have a special order you use?

The system won't care. All it sees is the voltage, not how it is made. I use (2) 4s on mine but always start with the negative side because of my afterburner. There is nothing wrong with you connecting the batteries on the series connection and then plugging into the system from there...

[Cape Jets]

I will most likely be doing the same thing soon. I have the new FMS 8s set up in my F-16 and it is really impressive!! It may not feel all that fabulous at first because the bearings have not broken in yet. After the 6-8th flight the plane really will come to life!! The fan is a power house!!

Since you have the same set-up in your F-16 how do you hook up the batteries? Do you use the 6S & 2S combo? Do you plug both in to the series connector then to the ESC? Or do you have a special order you use?

[Evan D]

Not all ESCs beep the number of cells. I am not sure but don't think the ESCs that are in the PNP FW 8S EDFs, what you are using, beep the cells.

[gooniac33]

Upgrade completed on the F-15 to 8S with the FMS 90mm and Freewing 150amp 8S ESC.... No issues setting up ESC but question. When you hook up the 2S then the 6S will you hear 8 beeps from the ESC? Not sure if the ESC is seeing the 8S system. It throttle ups fine and seems fine , but not sure.... Thoughts?

the 8 beeps are indicating that it is an 8s system. All good!

[Cape Jets]

I will most likely be doing the same thing soon. I have the new FMS 8s set up in my F-16 and it is really impressive!! It may not feel all that fabulous at first because the bearings have not broken in yet. After the 6-8th flight the plane really will come to life!! The fan is a power house!!

Upgrade completed on the F-15 to 8S with the FMS 90mm and Freewing 150amp 8S ESC.... No issues setting up ESC but question. When you hook up the 2S then the 6S will you hear 8 beeps from the ESC? Not sure if the ESC is seeing the 8S system. It throttle ups fine and seems fine , but not sure.... Thoughts?

[Cape Jets]

First step to the FMS 8S up-grade to the Eagle. There is some shaving of the foam to get this beast to fit. Found the best way to do it was using a solder iron to remove the excess foam needed for this EDF to fit. A good 1/8 inch needs to be removed from the cover piece and the fuse needed only small amounts removed. The ESC post needed to be cut down atleast an inch for 150amp ESC to fit under the air cheater grate. So far so good on the install and need to extend the motor leads to complete the project. Looking forward to final set-up and getting this bird in the air again....