Hoaye F-18 build - Page 6 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-28-2015, 01:29 PM   #51
4stripes
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Re: Hoaye F-18 build


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The 2000kv setups I suggested fly our A10 3.78kg at half throttle even with all the ordinance attached.
Hard to beat the value and they are not heavy at 193g each.
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Old 07-29-2015, 05:52 AM   #52
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Re: Hoaye F-18 build

That EDF unit you have is the same as the ones I'm using if it's the 12 blade version. With the Mega motor, they come out at 6 1/2 oz. each.
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Old 07-29-2015, 06:45 AM   #53
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Re: Hoaye F-18 build

Just stumbled upon this 4s unit from x-flight which doesn't look bad for $29.99. I would still recommend 6s as you will get more watts while having lower amps.
http://www.x-flight.com.hk/index.php?cat=&p=6&id=259
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Old 07-29-2015, 09:03 PM   #54
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Re: Hoaye F-18 build

This is some great discussions guys. Keep it going as I'm learning a lot from all 3 of you....
Thanks,,,

D.
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Old 07-30-2015, 04:17 AM   #55
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Re: Hoaye F-18 build

One important thing about all choices is that they must be dynamically balanced or the sound will be much louder and the chance of catastrophic failure is much higher due to the stress on the plastic motor mount. I do have a thread regarding the 6s fan suggested and another regarding my technique for balancing.
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Old 08-02-2015, 05:49 PM   #56
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Re: Hoaye F-18 build

To attach the wings, first I had to cut off the moulded attachment tabs that are on the wing root and glue them separately on the fuselage because of the locking tabs would not allow the carbon shafts to side into the wing. Next I marked the locations of the spars onto the underside of the wing and routed out channels with my Dremel with the router attachment, use a Dura Grit 80 grit straight burr and cleaned up the channels with my Dura Grit sanding bar.
Used System Three epoxy and cabosil filler to thicken up the epoxy so it wouldn't run when smeared on. Applied a liberal amount to the wing root, on the soars and smeared the channels.
Then, simply attached the wings in place, with my finger, smoothed out the seam at the wing root and cleaned off all excess.
Blocked up the wing tips and used T pins to hold the wing roots in alignment with the fuselage. Now it's just the waiting for everything to cure.
The vertical fins are not glued in at this point.
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Old 08-02-2015, 07:45 PM   #57
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Re: Hoaye F-18 build

Installing the rudder and servo in the fins. I use the Dura Grit 1/8" Straight Burr in the router attachment in the Dremel to hog out the servo pocket. Since it doesn't cut, it sands, doing this is very controllable, so nice neat pockets or channels can be made.

The type of hinge I really like is the old Klett style of pin and flat hinge. Very easy to install, like regular pin hinges, but has the advantage of having a wider hinge connection yet is almost half as thick as pin hinges of the same size. You can get them from Hobby King, of course ......

I prefer to install a piece of 1/16" thick plywood to screw the control horn onto instead of sandwiching the control horn and its base between the foam control surface. Much more stable a mounting. The piece used is 5/8" wide and 3/4" long. Route out the space with the straight burr, then before gluing it in, I use the Dura Grit Pointed Burr to make divets on the foam surface, the glue bond is very strong.
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Old 08-03-2015, 03:54 PM   #58
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Re: Hoaye F-18 build

Worked on the stabilizer today, had to balance the stabs as they were way to tail heavy. Simply epoxied some lead weights in the root and now they stay balanced at any angle.
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Old 08-03-2015, 03:59 PM   #59
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Re: Hoaye F-18 build

Fitting the stab servo was easier than I figured. There is the moulded web that the EDF units are mounted on, so there was enough room aft of their location for a decent size servo. I had a few new but older FMA servos, analog but so are the rest. It's their S360 servo, 81 oz of torque on 4.8 volts, so on 6 volts, it'll have plenty of muscle to move the stab. My main objective was to keep the control rod short as possible.

Even so, the space was very limited.
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Old 08-04-2015, 06:12 PM   #60
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Re: Hoaye F-18 build

Today I got all the controls installed and balanced the model. Just have to glue in the battery tray and Velcro in the batteries and receiver. Fired up the fans, both ran nice and smooth. Then the moment of truth, weighing it in. Was very pleased, tips the scales at 6 lbs 6 oz.

So, I'll go through it a couple more times and see if I can shave off an ounce here and there. I would like to somehow bring it down to an even 6 lbs. Then painting it in a day or so.

As far as the cockpit, just a sile pilot bust and nothing else
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Last edited by Dutkoski; 08-05-2015 at 07:08 AM.
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