Originally posted by socalengineer
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Official Freewing 80mm EDF F-86 Sabre Thread
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Sharing a video flying formation/dogfight with a Sabre at an interesting field:YouTube: https://www.youtube.com/user/motionsic
Facebook: https://www.facebook.com/FPVAirCombat
Instagram: https://www.instagram.com/fpvaircombat/channel/
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My F86 is very, very stable flier, however no matter what I’ve done, I need to use about 75% of my elevator servo to keep the plane flying level. CG is measured at 180 cm, exactly where the CG needs to be, but I think the problem is the batteries I use cause the plane to be too heavy. I have the regular F86 80mm, not the performance one. I know it’s not the performance f86, but the plane still flies sluggish and slower than my propeller plane.
I use a 6000 mah HOOVO 6S battery, weighing in at 818 grams, 25 ounces. Should I get a lighter battery? Nothing else has been installed in the aircraft, and battery is pushed up as far back as it can possibly go, and i don’t have any expos on my controller. Any ideas to try and lighten up the aircraft or make it fly faster?
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Thank you for the ESC calibration, I did not know ESC's could be calibrated.
I bought the 6000 MaH 818 gram batteries because I want to make sure I wouldn't run out of battery for too long, but it sounds like it makes a small difference for the motor I have due to it taking a lot more power to keep my nose up. Ill take a look at getting 4500 MaH batteries, and maybe I can use my 6000 MaH batteries for my F-16C super scale. That plane should be able to fly with it well.
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An 818g battery is pretty heavy for this plane, particularly if you aren't running the Hi Perf. inrunner. I use a 5000 Gens Ace 725g battery on the Hi Perf. fan and it's actually very lively. With the less powerful outrunner, you might be better to use a much lighter battery. Also, that Hoovo LiPo you're using is likely not giving you more than 25C. Find something that is light but will give you a "real world" C rating of closer to 40C. Most brand name LiPos stating 70C or more will give you that 40C you need for a jet. (Hint: SMC - their 40C Lipos actually give you about 38C and they're light.)
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Originally posted by Syntha View PostThank you for the ESC calibration, I did not know ESC's could be calibrated.
I bought the 6000 MaH 818 gram batteries because I want to make sure I wouldn't run out of battery for too long, but it sounds like it makes a small difference for the motor I have due to it taking a lot more power to keep my nose up. Ill take a look at getting 4500 MaH batteries, and maybe I can use my 6000 MaH batteries for my F-16C super scale. That plane should be able to fly with it well.
https://www.rcgroups.com/forums/show...st-Comparisons
Oh, you can search YouTube for a "how to" on throttle calibration.
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Originally posted by SanExup View PostNo worries, it's common issue if a plane seems excessively underpowered.Which your description sounded that way. I'd try lighter batteries and fly it! Switching later to the high performance is easy enough.
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xviper
Yeah, I just purchased a second hp one to paint like an FJ Fury...since it continues to snow and rain here. It'll get dry and smokey soon enough so I'm not complaining loudly. It's refilling the reservoirs.
I really need to get some of the SMC batteries to try, they sound worth the while!
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Originally posted by Syntha View PostI want to buy the SMC 5300 MaH for the F86 12 blade out runner (non high performance). Do you think it would work well? Its about 685 grams.
PS. If you are going to get them, get them while they have stock. I’ve been told that supply on quality LiPo’s is and will continue to be limited. I’d love to get some but shipping from Florida to me is complicated and the only Canadian dealer has very limited stock on what I need.
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I think I'm going to plan to get the 4500 MaH Graphene V2 ones, they seem to be better than the extreme SMC batteries, performance and weight wise. The 4500 MaH batteries are 588 grams, and I think I'm going to try them in the F16 super scale, since the flight time for those is usually limited to max 4 minutes anyway. People are saying to stick with 4000-5000 MaH for the F16
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Originally posted by Syntha View PostI think I'm going to plan to get the 4500 MaH Graphene V2 ones, they seem to be better than the extreme SMC batteries, performance and weight wise. The 4500 MaH batteries are 588 grams, and I think I'm going to try them in the F16 super scale, since the flight time for those is usually limited to max 4 minutes anyway. People are saying to stick with 4000-5000 MaH for the F16
Also for those who are interested I have just added Freewing F5E trailing link oleos,55mm dia wheels to mine using 25mm long pins. You will have soft suspension with the standard spring and the plane weighing 2.8kg all up incl 715gm battery. Photos below. I would not go any heavier with this set up
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Welcome to the F-86. Unfortunatly this plane has some things you need to learn (either through your own flying it or by the experience of others).
As noted ALL ESCs need to be calibrated. They should be calibrated when you first set up any aircraft and recalibrated if you change set up, receiver, TX set up etc.
The book balance is not right for the F-86. We do a balance test called a tail sit test to get the right CG. To do it put the battery in the plane and put the canopy on. Lift the nose until the tail touches and let go. Adjust the battery until it will stay touching the tail to the ground if you let go. Once set touch the nose lightly and the nose should drop and touch the table. This is a stock plane with stock landing gear. Swapping out the main struts for trailing links changes this.
To get a proper balance many of us have had to reposition the ESC to be able to move the battery further aft. Be careful using large batteries as there is limited vertical height under the canopy.
The neutral positions of the elevators is critical too. Most align them along the line of the horizontal stab and then find they need a lot of up trim. The proper alignment is to have the top edge of the elevators evet with the top edge of the fuselage. I found this picture to show you.
While we are at it also do a good range check on your airplanes and please set a throttle kill switch for safety.
Originally posted by Syntha View PostMy F86 is very, very stable flier, however no matter what I’ve done, I need to use about 75% of my elevator servo to keep the plane flying level. CG is measured at 180 cm, exactly where the CG needs to be, but I think the problem is the batteries I use cause the plane to be too heavy. I have the regular F86 80mm, not the performance one. I know it’s not the performance f86, but the plane still flies sluggish and slower than my propeller plane.
I use a 6000 mah HOOVO 6S battery, weighing in at 818 grams, 25 ounces. Should I get a lighter battery? Nothing else has been installed in the aircraft, and battery is pushed up as far back as it can possibly go, and i don’t have any expos on my controller. Any ideas to try and lighten up the aircraft or make it fly faster?
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Originally posted by kallend View PostA friend did a gear-up landing into the grass and broke the cheater grill on his F-86, so I made a replacement for him.
I have posted the STL file at https://www.thingiverse.com/thing:5394295
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Originally posted by Evan D View PostWelcome to the F-86. Unfortunatly this plane has some things you need to learn (either through your own flying it or by the experience of others).
As noted ALL ESCs need to be calibrated. They should be calibrated when you first set up any aircraft and recalibrated if you change set up, receiver, TX set up etc.
The book balance is not right for the F-86. We do a balance test called a tail sit test to get the right CG. To do it put the battery in the plane and put the canopy on. Lift the nose until the tail touches and let go. Adjust the battery until it will stay touching the tail to the ground if you let go. Once set touch the nose lightly and the nose should drop and touch the table. This is a stock plane with stock landing gear. Swapping out the main struts for trailing links changes this.
To get a proper balance many of us have had to reposition the ESC to be able to move the battery further aft. Be careful using large batteries as there is limited vertical height under the canopy.
The neutral positions of the elevators is critical too. Most align them along the line of the horizontal stab and then find they need a lot of up trim. The proper alignment is to have the top edge of the elevators evet with the top edge of the fuselage. I found this picture to show you.
While we are at it also do a good range check on your airplanes and please set a throttle kill switch for safety.
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Thanks for sharing that, I am definitely going to swap out to the F5 trailing link. That will be an improvement for where I fly!
Fortunately and unfortunately I have been making some trips to Salt Lake lately and finally stopped at Hill AFB Air Museum. They have such a broad collection. To many great planes to mention in this thread but it's jets of all era's. And some great warbirds and prop planes. From biplanes, to a Mig21, to a F117, to a predator drone. It's well worth stopping if you find yourself in Salt Lake City!
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