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Pilot-rc PREDATOR 2.2m Sport jet / full composite

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Pilot-rc PREDATOR 2.2m Sport jet / full composite

Old 10-13-2019, 08:58 PM
  #551  
bodywerks
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Where is everyone at on CG? I'm at 11", ~280mm, which is the back of the recommended range. I thought I read somewhere though that even that is on the noseheavy side?
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Old 10-14-2019, 02:43 AM
  #552  
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Originally Posted by bodywerks View Post
Where is everyone at on CG? I'm at 11", ~280mm, which is the back of the recommended range. I thought I read somewhere though that even that is on the noseheavy side?
I'm at the back of the range too and is still a bit nose heavy - I used the balance rig and with a full UAT and about 1" of fuel in the main tank it would just start to tip to the tail when suspended by the rig, In fact I was just checking the CG from moving my ECU battery back in an inverted 45 degree upline when my flameout occurred. Just before it flamed out I was saying to myself that CG seemed about right in that I wasn't pushing any down elevator to keep the 45 level. Now with using a separate UAT mounted behind the main tank I suspect it will move back a bit more. I'll post feedback and a final number after I get to fly it next weekend with the fuel system mods.
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Old 10-14-2019, 03:31 AM
  #553  
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Dreamworks has them, no?

I used an FCT in my Havoc from Dreamworks
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Old 10-14-2019, 06:01 AM
  #554  
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They only have one intairco, and it's huge with built in telemetry.
Not keen on the other canister ones because they are not clear, use a felt type filter, and I believe they are built to order and have a lead time of 5-7 days. I was able to order one through intairco direct with Express EMS shipping for the same price as an appropriate one from DreamWorks, and it's already shipped.
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Old 10-14-2019, 06:45 AM
  #555  
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Originally Posted by bodywerks View Post
They only have one intairco, and it's huge with built in telemetry.
Not keen on the other canister ones because they are not clear, use a felt type filter, and I believe they are built to order and have a lead time of 5-7 days. I was able to order one through intairco direct with Express EMS shipping for the same price as an appropriate one from DreamWorks, and it's already shipped.
My Predator 2.2m UAT had a air leak. The fuel tank was OK. I mounted a Pacific RC jets UAT tank in front of the main tank. I have never had a problem. Only a slight relocation of the plane rx battery. I balance slightly tail heavy with a full UAT with the supplied balance rig. On a 45 degree up line inverted at 3/4 power I get a slight nose drop. The plane lands easy.
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Old 10-14-2019, 10:13 AM
  #556  
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Default C.G.

I got everything set up except my satellite receivers. With zero fuel, it barely stays in a wheelie. I think it will barely fall out of a wheelie with a full uat.
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Old 10-14-2019, 12:04 PM
  #557  
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I think mine did the same after checking with the balance fixture
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Old 10-15-2019, 04:06 PM
  #558  
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Finally got around to setting the radio up. The flaps have a fairly bad flutter at mid flaps. I know what causes it, just wondering if anyone else sees a similar thing happening, and if it concerns you.
Mechanically, they are kinda poorly set up, with mechanical advantage almost favoring the flap surface over the servo. There is also play in the linkage.
Running straight 2s lipo ain't helping either...
I know they won't do this in the air, but I think I will get some shorter arms and new ball ends.
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Old 10-17-2019, 09:42 AM
  #559  
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Check the UAT from Aeropanda made by digitech, I like the fitting on the one I just got from them.
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Old 10-17-2019, 04:35 PM
  #560  
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Thanks, but already ordered the intairco.
Turned out the ball links were hella loose. Replaced them and also moved the ball link to the inner hole and had plenty of throw for factory recommended flaps. I also set up 3mm of reflex in the ailerons for landing flaps.
I'm thinking about running just the 4.6L tank with my 170. I am guesstimating that I'll consume an average of about 400-450ml/min(max is rated at 535ml and 90% throttle is claimed to be about 400ml). I think I should be good for 8 minutes easy, and I usually only fly around 6 minutes.
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Old 10-21-2019, 08:04 PM
  #561  
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Just picked up a Predator 2.2m here in Australia - going with a K140 for power

What servos other than the recommended Pilot Servos have owners been using in their builds?

Cheers
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Old 10-21-2019, 11:39 PM
  #562  
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I used 7954 hitec servos. They seem to work well.
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Old 10-22-2019, 03:15 PM
  #563  
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Thanks for the feedback airborn900 - appreciated
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Old 10-23-2019, 07:02 AM
  #564  
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I’m running,

Savox 2290s on the tail and 2270s on the wing. A 2274 for steering. Powered by a power box SRS mercury with GPS.
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Old 10-23-2019, 04:50 PM
  #565  
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Jet is ready for maiden. Finished out at 29.75lbs. The sw170b has a good bit of residual thrust at idle. It wants to get rolling at idle even with the rpm dropped 1000 below spec rpm.


Last edited by bodywerks; 10-23-2019 at 07:21 PM.
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Old 10-23-2019, 05:53 PM
  #566  
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Looks good
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Old 10-24-2019, 06:43 PM
  #567  
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Awesome.
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Old 10-30-2019, 05:46 PM
  #568  
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Successful maiden today! I have a couple short clips from the flight but they're on FB and I can't share them. This thing is a pu$$ycat!

Last edited by bodywerks; 10-30-2019 at 06:01 PM.
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Old 10-30-2019, 06:10 PM
  #569  
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Looks nice! Where did you post the vids on FB?
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Old 10-30-2019, 07:27 PM
  #570  
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On my page. My friend took the vids and added them as comments here (take space away between face and book)
https://m.face book.com/story.php?story_fbid=3053078418040006&id=100000136347536&comment_id=3053783697969478¬if_t=feedback_reaction _generic¬if_id=1572485806353694&ref=content_filter
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Old 10-30-2019, 07:41 PM
  #571  
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Was a little nervous on landing and switched from mid flap to no flap instead of landing flap. Hence, the high speed touch n go!
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Old 10-30-2019, 08:16 PM
  #572  
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I couldn’t get the link to work..
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Old 10-30-2019, 10:08 PM
  #573  
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Congratulations on the maiden. Make sure to use a lot of flaps. You can do wheelie landing with it if you use 60-70 degree flaps, 1/4” crow and carry 2-3 click of throttle when flare. Mike.
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Old 10-31-2019, 05:46 AM
  #574  
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Originally Posted by camss69 View Post
I couldn’t get the link to work..
have to be logged in and copy the whole link starting at https, then paste to browser and delete the space between face and book. Or look up Nick Radle on fb and friend me.

Last edited by bodywerks; 10-31-2019 at 05:50 AM.
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Old 10-31-2019, 03:53 PM
  #575  
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Originally Posted by mikedenilin View Post
Congratulations on the maiden. Make sure to use a lot of flaps. You can do wheelie landing with it if you use 60-70 degree flaps, 1/4” crow and carry 2-3 click of throttle when flare. Mike.
thanks Mike. I am running 3mm of crow now, and factory recommended landing flap. It landed fine for a first landing, but was a little fast due to still having a half tank of fuel, and not knowing it's stall characteristics. First flight informed me this is a VERY forgiving airframe. I will try more flaps and more crow. Are you going to AZ jets?
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