Announcement
Collapse
No announcement yet.
Official Freewing MiG-29 Fulcrum Twin 80mm Thread
Collapse
X
-
Originally posted by janmb View Post
Yeah definitely see the challenge.
I think you overestimate fuel consumption though. Unless you plan on hovering for the entire flight, a twin X45 setup will mostly fly between 10-40% throttle, in which case the fuel per minute is far lower
My twin P20 in my A-10 of similar weight gave me 5+ minutes from just 32oz total...
Normally I would say no uat being a bad idea, but having seen how ridiculous amounts of air this turbine can suck up without flaming out, I'm tempted to go without as well
- Likes 1
Comment
-
Originally posted by HaroldAnderson View Post
It may be just the camera angle but the plane looks like it was on the verge of a stall to me. When you pulled up flaps that might have been the last straw. What do others think on this video? I've gotten too slow with jets several times turning onto final and that is how mine looked. Sorry to see that. Glad it isn't too bad. I've got the same afterburners in mine and it looks awesome. 6 flights on it so far.
Edit: I just noticed you said the flaps and gear were still down after the crash.
Originally posted by GliderGuy View Post
Don’t forget....all wires form BOTH ESCs.
I have a set of chokes on both sides of the aft battery. One set per ESC.
I did not put any on the motor side of the ESCs.
-GG
Comment
-
Yeah im not sure when the uncontrolled roll you describe occurs, is it at 11 seconds as the plane levels out from the slight left roll at 9 seconds? The entire clip looks like pretty low airspeed to be climbing at, although there isnt much in frame to get a proper reference.
I actually binned mine yesterday, current diagnosis (pending further inspection) is a weak pack leading to reduced thrust from one motor shortly after turning onto downwind after takeoff (i hadnt tried these packs in the mig before, nor will i again lol). She was wallowing around in a similar fashion to the one in that video as it approached stall, but started behaving after cutting the throttle and had enough altitiude and *just* enough control authotiy to get the nose pointed down for a semi-controlled belly flop. Still more inspection work to do but so far the damage is cosmetic, save for the bent elevator horn (went full up elevator at around head height to soften the blow).
I doubt those intakes will take another hit but they're good for one emergency landing lol.
Comment
-
Originally posted by crxmanpat View Post
- Likes 1
Comment
-
He actually waited to put up the gear. Normally he takes off and immediately does a dirty roll, then sucks up the gear on the downwind. The delay has to be there in case you have something with dual stage doors (like I did with mine). But it would be nice to be able to program the gear on the blue box based on single or dual stage doors.
On all mine with the blue box, I tend to hit the gear switch about halfway through my takeoff run, that way when I'm off the ground and climbing the gear are coming up.Pat
- Likes 1
Comment
-
Originally posted by crxmanpat View PostHe actually waited to put up the gear. Normally he takes off and immediately does a dirty roll, then sucks up the gear on the downwind. The delay has to be there in case you have something with dual stage doors (like I did with mine). But it would be nice to be able to program the gear on the blue box based on single or dual stage doors.
On all mine with the blue box, I tend to hit the gear switch about halfway through my takeoff run, that way when I'm off the ground and climbing the gear are coming up.
I do the boring slow takeoff lift and retract after climbing a few feet before doing a steeper ascent. Looks scale, so I've been told ...
Comment
-
Originally posted by janmb View Post
Have looked at baggies too, just something new to get into - like you, never tried that before.
Definitely would require running a decent size UAT in addition though - almost impossible to avoid some air in that bag when filling, and absolutely no way to purge it.
I promise not to harp on anymore about this untill I actually have a model to tinker with lol.
- Likes 1
Comment
-
Originally posted by crxmanpat View PostHe actually waited to put up the gear. Normally he takes off and immediately does a dirty roll, then sucks up the gear on the downwind. The delay has to be there in case you have something with dual stage doors (like I did with mine). But it would be nice to be able to program the gear on the blue box based on single or dual stage doors.
On all mine with the blue box, I tend to hit the gear switch about halfway through my takeoff run, that way when I'm off the ground and climbing the gear are coming up.
Comment
-
Maiden report - She flies amazing! RCjetdude helped me get her buttoned up as usual and is really helping me learn. Remember, just 1 month ago I tried to fly the 80mm a-10 as my first EDF and that ended in the dreaded bounce. Since then, I have somewhere over 100 flights on the eflite f-4 and su-30 to try and get up to speed. It's been a... process but finally feeling way more comfortable and capable.
I flew the HRB 6000mAh 50c batteries at the rear and middle location. RX is up front. CG was DEAD on which some are reporting as a bit conservative or nose heavier. I have to report that i required absolutely ZERO trim at the recommended CG location. Even with flight modes to mix in elevator trim to flap I didn't need it. At both half and full flaps, it maintained attitude without any adjustment. I did add about 2-3mm more elevator trim at default than the book recommended. I haven't tried my much lighter Spektrum 5000 bats yet. High AoA landings were smooth and easier than the SU-30. She's fast, but doesn't seem like it because of how large it is. I used the inner most elevator servo hole per RCjetdude's standard practice/advice, even though I had the upgraded servos. I still got my throws so it's good. She lands in a much shorter amount of space than the f-4 or su-30.
Our maidens were pretty uneventful and I'm thankful for that. Steve flew first and it was good to watch it's characteristics. I can't wait to get back out and fly it again!
One of the guys at the field tried to chase us around with a GoPro strapped Timber which was pretty funny. He captured some pretty cool video though and did a quick edit. Alpha : This thing is PERFECTION! Congrats!
Quick chase video from the Timber:
- Likes 6
Comment
-
Check me out on youtube at https://www.youtube.com/user/gooniac33
I am an RC addict and innovator that loves to share my knowledge with those that need help. Ask me anything via PM if you need help! Check out my Website here https://www.gooniac33.me/
- Likes 1
Comment
-
Cool video from the hill-top!
Could do with a bit of post-processing stabilization though but it was amazing nonetheless! :D
Originally posted by DCORSAIR View Post
I was waiting for someone to say it first, it looks like a stall to me as well, maybe its not and you find a problem, but I have seen that too many times from jet guys and myself included, it just looked to slow to me.
That's how excessively-nose-heavy planes stall when pulling too much on the elevator when flying slow (another reason I loathe nose heavy CGs).
But from the video alone I can't quite determine if it's just a stall or something else.
An asymmetric flap deflection could pretty much cause the same reaction, and an EDF stopping and causing assymmetric thrust would do it too.
Originally posted by RCPLANEFANATIC View PostAirguardian: was running the jet completely stock with the upgraded servos from Freewing. As per the instructions, I have the elevator servos plugged directly into the RX and everything else goes through the BB. The only modification I have done is my own centerburners which are running off my other flight battery.
I can't say anything for certain here, other than the proper use of tailerons and better CG placement would have likely helped avoid the crash.
- Likes 1
Comment
-
Originally posted by DCORSAIR View Post
I was waiting for someone to say it first, it looks like a stall to me as well, maybe its not and you find a problem, but I have seen that too many times from jet guys and myself included, it just looked to slow to me.
Comment
-
Hello all, just wanted to throw this out there. There has been a lot of talk about adding ferrite rings as an added security measure. Some have pointed out that the plane comes from the factory with the green ferrite ring on the "throttle" line. Mine has one but it is on the power supply line from the bec just like in my f22 from the factory. Is my setup messed up or am I just reading it wrong? I never had any issues with my f22 (stock original setup) but for a few cents I figure why not add a few. Thanks!2 Photos
Comment
-
Originally posted by Nickc2023 View PostHello all, just wanted to throw this out there. There has been a lot of talk about adding ferrite rings as an added security measure. Some have pointed out that the plane comes from the factory with the green ferrite ring on the "throttle" line. Mine has one but it is on the power supply line from the bec just like in my f22 from the factory. Is my setup messed up or am I just reading it wrong? I never had any issues with my f22 (stock original setup) but for a few cents I figure why not add a few. Thanks!
To be most effective, the ferrite chokes must be placed on the wires coming from the ESCs AND BE PLACED AS CLOSE TO THE ESCs AS POSSIBLE.
Any additional RF filtering is going to help. But, your best results will be with the RF chokes placed as close to the ESCs as possible.
Why? Less wire length = smaller antenna length that is radiating the RF noise from the ESCs.
This rough diagram helps make it clear....the dashes are wires coming from the ESCs...
ESC—radiating—RF Choke——-Not radiating
Now you see the need to put the RF choke as close as possible to the ESCs and on every wire coming forward from the ESCs. I don’t put chokes on the 3 wires going to the motors.
Feel free to think of this as hogwash. I can testify that my high current ESC birds are NO LONGER crashing due to radio glitches. I had 3 cases of glitches before beginning to use these RF chokes. I lost one F-4 and had the A-10 get glitchy twice. Was able to repair the A-10’s first crash....2nd one went into the trees. Not even a hint of a glitch since installing RF choke filters (in 1000+ total flights...F-4, AL37, MiG).
-GG
P.S. The radiated RF noise gets into the receiver from the receiver’s antenna, too. Not just the wires connected to the receiver. Don’t construe this to mean that a choke is needed on the antenna. It just means that chokes placed on the wires at the receiver are less effective. Need to stop the noise at the source....the ESCs.
Comment
-
Originally posted by Airguardian View PostJudging from that crash, looks like the MiG-29 and the Hornet share a problem with flap servo authority.
Using full flying stabs might had allowed you to fight it out and save the jet, but then again... these jets are 'factory reccommended' to be dumbed down. A lot of pilots may also crash their jets due to bad taileron setup. Personally I think it'd be better to teach pilots to use the full potential of the jet in a safe fashion. Using conventional elevators and ailerons on a jet designed to use tailerons is a waste.
I wish the manuals and vendors on social media would do a better job of guiding customers from a "safe" starting point into more sensible and rewarding configurations.
We have seen mild traces of that lately, but still soooo much more that could been done.
Following up the initial launch videos of a new model with one or two follow-up videos delving into more fine tuned configs would been good. Definitely keep whatever disclaimers you feel necessary, but do it! :D
Originally posted by Airguardian View PostIn short: Factory CG recommendations are pretty bad. Those of Freewing included.
But since many users act dumb, giving actually 'good CG' recommendations is a liabilty, so there's your 'enlightening reply' :)
Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
- Likes 1
Comment
-
Originally posted by themudduck View PostA friend of mine named Brent Lane, who is a professional photographer (and new RC'r that I am helping) took some pics today during a flight of my Mig. WOW!
Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
Comment
-
Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
Comment
Comment