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Thinking of starting an F-18 pusher

Old 09-07-2008, 07:35 PM
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aero_k
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Default Thinking of starting an F-18 pusher

I've decided I want to try a pusher jet for my next build. I've chosen to try the F-18 from plans by jetset44 from here: http://www.parkjets.com/F-18-jetset44.html

I've never done a jet before, and this will probably be the most complicated build I have done, but it doesn't look too bad. I still haven't chosen a power setup. Anything I should be aware of before starting this project?
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Old 09-07-2008, 07:38 PM
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GreenAce92
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It'll be fast lol
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Old 09-10-2008, 02:55 PM
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aero_k
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Well fast would be nice. I'm not really looking for blazing speed, but something that will be exciting to fly. I've started cutting out the pieces of foam. As usual, I'm using Elmers foam board. The plan calls for 6mm depron, and the Elmers foam is 5mm, so I think I should be okay, just a few modifications. My only concern is making sure the wing is strong enough with the thinner foam.

I've got a few options for motors. I just bought a Turnigy 2213 motor (http://www.hobbycity.com/hobbycity/s...idProduct=5688) that I'm thinking of putting a 9x7 prop on it which should give it good speed and thrust. The AUW should be between 15 and 18 oz according to the plans.
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Old 09-10-2008, 11:59 PM
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Rsiaviation
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I built a Jetset44 F-15 which was very nice build. The most time consuming part was cutting out all of the parts. It flys very nicely, however, with my power setup was a little less than it should have been. The bigest shortcut I did was to make the nose cone and canopy out of 1" thick styrofoam I had laying around.

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Old 09-11-2008, 12:25 AM
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CHELLIE
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Originally Posted by aero_k View Post
Well fast would be nice. I'm not really looking for blazing speed, but something that will be exciting to fly. I've started cutting out the pieces of foam. As usual, I'm using Elmers foam board. The plan calls for 6mm depron, and the Elmers foam is 5mm, so I think I should be okay, just a few modifications. My only concern is making sure the wing is strong enough with the thinner foam.

I've got a few options for motors. I just bought a Turnigy 2213 motor (http://www.hobbycity.com/hobbycity/s...idProduct=5688) that I'm thinking of putting a 9x7 prop on it which should give it good speed and thrust. The AUW should be between 15 and 18 oz according to the plans.
Thats a nice little motor, the guys in my club use that motor alot and love it, its does well with a 7x6 prop, Good luck on your build, take care, Chellie
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Old 09-11-2008, 02:06 AM
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Maybe the 9x7 will be a little too much for this motor (if not too much for the plane?) One thing I noticed is that the shaft is too big for the GWS props I have. I'm not sure if APC props are bigger, or if I have to drill out the center of the prop.

Anyway, I'm back in school (4th year of my Aerospace Engineering program), so it will be hard to find time to work on the build, but this is one I want to take my time on anyway so it comes out really well.
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Old 09-11-2008, 02:59 AM
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ooo engineering program, that is pretty cool thats the field i hope to go to myself. Maybe ill be working for you someday lol
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Old 09-11-2008, 06:30 AM
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CHELLIE
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Originally Posted by aero_k View Post
Maybe the 9x7 will be a little too much for this motor (if not too much for the plane?) One thing I noticed is that the shaft is too big for the GWS props I have. I'm not sure if APC props are bigger, or if I have to drill out the center of the prop.

Anyway, I'm back in school (4th year of my Aerospace Engineering program), so it will be hard to find time to work on the build, but this is one I want to take my time on anyway so it comes out really well.
Hi Aero K the GWS props have a 3mm hole, the motor you showed has a 3.175 shaft, 3.175 is 1/8" so you can just drill them out, also the motor comes with a prop adapter, so you can use the APC type props, it attaches on the motor can, or you can get a collet type prop adapter, and mount APC type props on the shaft, hope that helps, Chellie

http://www.headsuprc.com/servlet/the...-3.17mm/Detail

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Old 09-16-2008, 10:06 PM
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Here is my F-18 from 6mmflyrc. Mine is a FA-18 superhornet, a modified Shumate design.They’re very good fliers and do not need to go fast to be fun. Many builders of this size park jets are using the Littlescreamers motors, or the BP/Grayson A2212-6, 2200kv out runners in them with a 3s lipo batt. The one thing I would warn against your proposed set up is the use of a large prop. The motors I mentioned usually use APC, 4.75X4.75 to 6X4e props. The use of a prop any larger will cause big torque roll problems at launch and when you throttle up from light throttle to max throttle. The light weight-short wing span configuration of these planes is a major factor in this trait. Good luck with your build.

Rick
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