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Build report: Hobby-Lobby F-16 Pusher Jet

Old 05-19-2008, 04:17 AM
  #1  
michael7810
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Thread Starter
 
Join Date: Jul 2007
Location: Phoenix, AZ
Posts: 79
Default Build report: Hobby-Lobby F-16 Pusher Jet

I picked this up at the crash sale a couple weeks ago and finished the build this weekend. Flying weather is almost over in </O:p
I had planned to build it with two servos (1 for each elevator) and either rig the ailerons to work with the elevators OR rig the elevators as elevons. I though I could just add the aileron servo later if it didnít fly right. That was the plan; but the first step is to install the aileron servo because the forward and aft fuselage pieces and both wings bury the servo. Plan B; I traced all the foam parts on cardboard so I could build another jet later after seeing how it flies build per the plans.
<O</O
The only issue with the parts was aileron push rods were too short which required about a 1.5-inch extension.
<O</O
This is my first foamie build so I experimented with gorilla glue, FSCA, and epoxy. I tried mixing the GG with water (I read that somewhere) which was a mistake for this application. That has got to be the stickiest stuff on earth. I found 20-minute epoxy for the parts I could let set overnight and 5-minute epoxy for the parts I had to hold together worked best. I used FSCA to fasten the elevator servos. Next time I will skip the GGÖlessons learned.
<O</O
The rest of the build was easy following the instructions. The only piece of data the instructions lacked was control surface throws. It ended up with 3/8-in on the elevators and 5/8-in for the ailerons. AUW is 13.25 oz. The crash sale included a LittleScreamer Park Jet motor (MMC2800) that advertises to pull 180 watts. That would fly my 48-inch Super Sportster!! I installed a 6x4 prop and at full power with a 3S Lipo it pulls 17 Amps. Just short of the 18 amp max according to the instructions. The area around the motor buzzes pretty loud (more like barks like a dog) above 12 amps. Iím not sure how will be in flight. Iíll beef up the elevator area with carbon rods on my next build (or first rebuild). <O</O
<O </O
Iíve included some pictures of the completed project. I used a 3S1P2100 Lipo close to the nose to get the CG at the recommended 8 cm back from the leading edge. <O</O
<O </O
Iíve never flown anything like this so any tips from the readers will be appreciated. I have a fair amount of time with trainer and sport models but Iím a little nervous with this one.

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michael7810 is offline  
Old 06-01-2008, 03:54 PM
  #2  
oct2633
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Join Date: Jan 2008
Posts: 47
Smile Good Build

Originally Posted by michael7810 View Post
I picked this up at the crash sale a couple weeks ago and finished the build this weekend. Flying weather is almost over in </O:p
I had planned to build it with two servos (1 for each elevator) and either rig the ailerons to work with the elevators OR rig the elevators as elevons. I though I could just add the aileron servo later if it didn’t fly right. That was the plan; but the first step is to install the aileron servo because the forward and aft fuselage pieces and both wings bury the servo. Plan B; I traced all the foam parts on cardboard so I could build another jet later after seeing how it flies build per the plans.
<O</O
The only issue with the parts was aileron push rods were too short which required about a 1.5-inch extension.
<O</O
This is my first foamie build so I experimented with gorilla glue, FSCA, and epoxy. I tried mixing the GG with water (I read that somewhere) which was a mistake for this application. That has got to be the stickiest stuff on earth. I found 20-minute epoxy for the parts I could let set overnight and 5-minute epoxy for the parts I had to hold together worked best. I used FSCA to fasten the elevator servos. Next time I will skip the GG…lessons learned.
<O</O
The rest of the build was easy following the instructions. The only piece of data the instructions lacked was control surface throws. It ended up with 3/8-in on the elevators and 5/8-in for the ailerons. AUW is 13.25 oz. The crash sale included a LittleScreamer Park Jet motor (MMC2800) that advertises to pull 180 watts. That would fly my 48-inch Super Sportster!! I installed a 6x4 prop and at full power with a 3S Lipo it pulls 17 Amps. Just short of the 18 amp max according to the instructions. The area around the motor buzzes pretty loud (more like barks like a dog) above 12 amps. I’m not sure how will be in flight. I’ll beef up the elevator area with carbon rods on my next build (or first rebuild). <O</O
<O </O
I’ve included some pictures of the completed project. I used a 3S1P2100 Lipo close to the nose to get the CG at the recommended 8 cm back from the leading edge. <O</O
<O </O
I’ve never flown anything like this so any tips from the readers will be appreciated. I have a fair amount of time with trainer and sport models but I’m a little nervous with this one.

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Looks to me like an excellent build job Michael. Should fly well. Did you try low temp hot melt? Give us a flight report!

Last edited by oct2633; 06-01-2008 at 03:56 PM. Reason: Added suggestions
oct2633 is offline  
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