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Old Jun 07, 2012, 11:09 AM
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The thick lid on the ESC hole in the fuse bottom reduced the fan noise quite a bit ... that big hole was indeed acting like a resonant cavity

I used Doppler to estimate the speed on the old video and it came at around 106 mph level upwind (in ca. 13 mph headwind).

.
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Old Jun 07, 2012, 11:24 AM
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Thats a pretty good speed. What cell count were you again? 10s? 8s?
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Old Jun 08, 2012, 12:07 PM
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I am at 9S but am thinking of dropping down to 8S to reduce the power

The Hawk is well suited for slow gentle aerobatics ....
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Old Jun 10, 2012, 12:36 PM
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Short video clip of landing

.

FlyFly Hawk 90mm edf landing (0 min 12 sec)
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Old Jun 10, 2012, 07:48 PM
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Thats the way aha aha I like it aha aha, thats the way I like it.
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Old Jun 13, 2012, 01:25 PM
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I've had a few problems with the nosegear setup on my Hawk.

But then, the mains have worked very well so far with no issues, using the stock lightweight struts that came with the kit

The first problem was that I did not put in a tiny screw that prevents the steering servo mount from sliding off the retract mechanism block

That has been fixed now, but it required that I slide out completely the nosegear unit.

.
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Old Jun 13, 2012, 01:31 PM
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The second issue with the nosegear is that a stop built into the retract unit to prevent the strut from bending back too far is not strong enough (it breaks).

I first solved the problem with some foam that got immediately torn off on takeoff (the takeoff seems to put the most stress on my nosegear). That foam got torn off too.

So now I have a massive balsa block stop that prevents the strut from bending back on takeoff

On another unit the chip was loose in the control unit, but that's another story.
.
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Old Jun 18, 2012, 05:47 PM
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How did you install the CS Shroud so that you could get it out again?
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Old Jun 19, 2012, 02:27 PM
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Mine had all the blades glued in with Hysol, then precisely re-balanced on a very sensitive magnetic balancer, and tested before installation.

The motor (HET 650) is quality and should last several years ...

I was not planning on taking the EDF unit out anytime soon, it is mounted very securely to reduce vibrations and resonance.

It won't come out easily, some foam would have to be cut, and the mylar exhaust is a problem too.

Generally for foam EDF jets this seems the normal situation, if it's well mounted then it won't come out easily

On composite edfs it's a completely different story. Low cost foam EDFs tend to be "use and recycle" ...

I have EDF jets that have had their fans intsalled for four years (Rafale) and never a reason to take them out - except re-motoring or fod ingestion shredding blades.
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Old Jun 19, 2012, 03:18 PM
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So in other words, short words, you didn't cut the shroud down for easy removal. Ok, thanks.
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Old Jun 19, 2012, 05:41 PM
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... with such a heavy rotor cutting the CS shroud made no sense. It needs that massive shroud to achieve some rigidity and avoid vibrations.

Sorry for explaining to you my reasoning
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Old Jun 19, 2012, 06:00 PM
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Quote:
Originally Posted by Herb View Post
... with such a heavy rotor cutting the CS shroud made no sense. It needs that massive shroud to achieve some rigidity and avoid vibrations.

Sorry for explaining to you my reasoning
I'm just messing with you. C'mon man, anyone could see that.
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Old Jun 20, 2012, 02:50 PM
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contact

Hi Herb how are you i need to contact you because i like to start to work in the same airplane, i live you my email so i hope so you can contact me.

israfly747@hotmail.com

Best regares

israel
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Old Jun 20, 2012, 02:59 PM
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Quote

hi everyone , i like to start working on this jet so do you know about the quote aprox to this project.? $$$$$
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Old Jun 21, 2012, 12:02 PM
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Hi, maybe if you are a bit more specific it will be easier to help you

In any case, here is a semi-complete list of most / all the parts I used:

http://www.hobbypeople.net/index.php...ixed-gear.html (Hawk)

http://www.hobbywhere.com/index.php?...&product_id=53 (same one)

http://www.hobbyking.com/hobbyking/s...idProduct=9392 (TGY 90S servos x 5)

http://www.hobbyking.com/hobbyking/s...dProduct=16342 (or Corona digital)

http://www.hobbyking.com/hobbyking/s...dProduct=17206 (FASST comp. receiver)

http://www.hobbyking.com/hobbyking/s..._Gear_Set.html (landing gear mechanism)

http://www.hobbywhere.com/index.php?...&product_id=67 (same one)

http://www.hobbypeople.net/index.php...-1-main-2.html (strut set, twin wheel nosegear)

http://www.hobby88.com/shop/product_...ywdouohwhxfbla (same one)

http://www.hobbyking.com/hobbyking/s...dProduct=20696 (YEP 120A HV esc)

http://www.hobbyking.com/hobbyking/s...dProduct=20698 (YEP programming card)

http://www.hobbyking.com/hobbyking/s...dProduct=22070 (CS 12 bl fan)

http://www.highendrc.com/index_ecat.php?cPath=53_57 (HET 650 - 68 1350kv motor)

http://www.hobbyking.com/hobbyking/s...idProduct=3735 (hxt ubec)

http://www.hobbyking.com/hobbyking/s...idProduct=2038 (Voltmeter)

http://www.hobbyking.com/hobbyking/s...idProduct=7702 (edf rotor precision balancer)

http://www.hobbyking.com/hobbyking/s...idProduct=9921 (ubec jxt to 3S pack adapter)

http://www.hobbyking.com/hobbyking/s...idProduct=9682 (jst pigtail)

http://www.nitroplanes.com/98p-25c-3300-3s1p.html (GensAce 3300mAh 3S packs x 3 - to give 9S)

http://www.hobbyking.com/hobbyking/s...idProduct=9908 (misc items)
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