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nitromodels f16 pusher?

Old 05-13-2009, 10:21 PM
  #1  
XWind
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Default nitromodels f16 pusher?

Im thinking of buying this plane and coverting it to EDF. Has anyone had any luck and what was the setup? motor/esc/battery..etc. Any help would be great.
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Old 05-13-2009, 11:47 PM
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Moxus
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got any link to the model?

http://www.nitroplanes.com/ffifaarfbrel.html

is it this one?
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Old 05-14-2009, 01:14 AM
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Yes, that is the one. Thanks for the reply. Any comments on that one? I heard some complaints about the wing area not to scale but thats ok with me. Im sure it will fly just fine with the right EDF gear put in it.
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Old 05-14-2009, 03:18 AM
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Alpea42
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The fuse is fiberglass with a lotta ply bulkeads. It's heavy so wing loading is high , and C G is very critical. I saw one guy try 3 times to fly it.It wasn't balanced well and throws were not set up right. I heard his last attemp was with a Turnigy S K out runner equal to a .40. The ground killed it on that 4th attemp. Minni Steve has another one and he's gonna put it together as a pusher and try his luck with it. One problem with a pusher is by the time you get a large enough motor the prop hits when you try to rotate on take off. Ask Steve at Renegades about it. At this thread http://www.wattflyer.com/forums/show...35751&page=224 It sure is a good looking plane
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Old 05-14-2009, 03:58 AM
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it is about the same dimensions as my het rc f-20 tigershark.
i run it with a hacker b40 8l on a 6cell a123 battery pack, and turnigy 100 amp esc.
this is a bit hard on the wemotec mf 480 that i use, and it does rub a bit against the housing, but it works. the rubbing does eventually stop as the blade tips gets worn down :P i know it sounds a bit "agricultural", but it does really work well. the alternative is to get carbon impeller or something like that, wich costs about the same as a real turbine engine.

anyway, if you go for the minifan 480 setup, check the diameter of your duct/engine bay. if it does fit, i recommend it. becuase its pretty good on performance, and very "all round" (as far as allround goes for edf anyway).
i get over 1 kilo on thrust on my setup, and as mentioned in previous post, you need a powerful motor for this plane. its a bit on the heavy side.
the hacker b40 performs WAY in excess of what its rated for, and i guess the same applies for any hacker motor, or other quality brands (for example, mega or lehner, wich also is popular in the power-edf setups).
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Old 05-14-2009, 04:30 AM
  #6  
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hey, thanks for all the comments. I will have to think more about it. The plane really does look sharp and a great bargain.
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Old 05-14-2009, 05:09 AM
  #7  
Papa Jeff
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Default Nitro F-16 Pusher to EDF conversion

I have been working on this for a while now and I think that I finally
have a handle on it. I'll post some photos and a few concepts in the
next few days.

Last edited by Papa Jeff; 05-14-2009 at 05:19 AM. Reason: to add image
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Old 05-14-2009, 05:57 PM
  #8  
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Thanks Jeff. Here is what I think I will need for the setup. Anyone please correct me if I am wrong.

Flight weight- 3.5lbs

Motor- 90mm 700w (72A) EDF Unit, Brushless
ESC- Brushless (72A+)
Battery- 11.1V 3300mah Lipo.

However, according to my calcs the flight time is very very short.

3.3/72Ax60=2.75 minutes(approx). Even if I go with a high mah, flight time is still short.

Any feedback would be appreciated.
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Old 05-14-2009, 06:30 PM
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Alpea42
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My personal opinion is IT'S TOO HEAVY to make a good EDF project. A 3 cell battery will be a weak power sorce. But if Jeff knows what he's up against I'll reserve those opinions and eat those words if he can make it fly. If it interrests anybody the Nitro Planes photo is a photo shop rendition of the plane against the sky. They couldn't even get an in flight picture
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Old 05-14-2009, 06:59 PM
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Yes, it may be a little heavy, but hopefully with a 90mm EDF Midi fan,
using an Ammo 36 1800kv motor with a Castle HV80 ESC and CCBEC
plus a 4S or 5S 4000-5000mAh pack.......it should fly just fine. Of
course......we shall see! I do agree with Alpea that a 3S pack is not
the best option for this conversion project. Here are a few photos.
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Old 05-14-2009, 07:03 PM
  #11  
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Yeah, you are probably right Alpea. Seems like this might be more of a turbine job and thats way too much money for me.
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Old 05-14-2009, 07:07 PM
  #12  
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Way to go Jeff, it looks sharp, almost there. I hope you post your Maiden flight. Hey, just looking at the specs of your motor, it migh very well work. I calculate at 6min flight time with a 5000mah.
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Old 05-14-2009, 08:21 PM
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its not too heavy for edf, it just demands power.
my f-20 is slightly over 1 kilo, and its powered by a 78mm fan. a 90mm will with no problem give 1.6 kiloes of thrust, and there you go, vertical performance. 1:1 power to weight ratio.
all the weight means is that you need speed. but isnt speed all what jets is supposed to be anyway?
thats just my opinion, anyway. i rather have a powerful edf with high wing loading, than a depron sheet, cut like the silhouette of a jet fighter, but flies like a leaf in the autumn wind.
the f-20 flies great, and it has even shorter stubbier wings than this f-16. all you need is speed. and a strong buddy to be your catapult, unless you actually got a catapult.
these models are surprisingly kind on landing too, with no nasty tendencies even with high nose on landings. just let them have their speed. dont take the speed down. thats bad.
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Old 05-14-2009, 09:18 PM
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Yeah that really looks nice Jeff. The speed thing is the right thing. But a sagging battery or too high of AOA or any number of other goofs and even Capt. Scully couldn't glide it in to the Hudson River. It should be fine tho with all that thrust.
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Old 05-19-2009, 10:12 PM
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Papa Jeff
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Default More photos

I did a few more mods and I just ordered some saddle packs. I'm
going for two 3S 5000's on each side of the EDF and I hope that
the battery weight over the CG will do the trick better than forward
under the cockpit. We shall see!

Removing formers & tray.
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Old 05-19-2009, 10:20 PM
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96mm MPI EDF unit was a perfect fit.
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Old 05-19-2009, 10:29 PM
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I did take the time to make the wings removable as the full length of the
wing tube went through the fuselage just where the EDF unit had to go.
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Old 05-19-2009, 10:39 PM
  #18  
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I did make some changes to the hardware that came with
the Nitro F-16 and basically it just made me feel a bit more
secure.
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Old 05-19-2009, 11:38 PM
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XWind
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Very Cool, getting closer!
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Old 05-20-2009, 12:13 AM
  #20  
Moxus
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looks nice so far keep us updated, this is interesting
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Old 05-20-2009, 10:03 AM
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Alpea42
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Nice modifications Jeff. 2 5000ma 3s batteries huh? Looks like you'll be over 5 lbs. flying weight.
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Old 05-26-2009, 05:17 PM
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So Jeff got a flight report yet? I'm beggining to think you're very busy , or it was an over weight disaster that wouldn't lift off a cliff.
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Old 05-26-2009, 06:34 PM
  #23  
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there is no such thing as overweight, just underpowered =)
when you think you got enough power, then twice the amount you got is about nice.
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Old 05-26-2009, 07:44 PM
  #24  
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O k then, hey Jeff did you have enough power???
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Old 05-26-2009, 08:16 PM
  #25  
Papa Jeff
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Default F-16 EDF

Alpea,

Well, you are kinda right, as i did get somewhat distracted with another
project that had to get done first. This weekend we maidened the Fly
Fly F-86 and it was most successful. The flying weight was 5.85 lbs. of
which 1.5 lbs. was the two 3S / 4050mAh / 30C Enerland packs. And,
there was no issue with power as 3/4 throttle produced an estimated
90-100 MPH. So, now I am confident that the F-16 will not be lacking
in power either as it should come in at about 4.5 lbs flying weight. Here
are a few photos. Now, back to the F-16.
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Last edited by Papa Jeff; 05-26-2009 at 08:25 PM. Reason: more photos
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