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Mark's TN Hawk Build

Mark's Tony Nijhuis 50" Hawk Build Log

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Mark Elen16/05/2018 11:25:47
327 forum posts
577 photos

Hi Craig,

Thanks for your kind comments. Off topic is no problem at all, if it helps someone else in the future that is what these forums are all about. 👍 It's always good to see how others have attacked similar issues, I always pick up loads of good tips from other people's build logs.

Cheers

Mark

McG 696916/05/2018 11:39:13
avatar
2052 forum posts
870 photos

I'm so pleased, Mark...

... so pleased that the Vicomte is simply a taildragger with fixed undercariage. yes wink

I must admit that the lasts posts to your thread are a bit... 'complicated' for me. cool

Keep on the splendid job.

Cheers

Chris

Simon Feather16/05/2018 15:06:32
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187 forum posts
159 photos
Posted by Martin McIntosh on 15/05/2018 23:07:06:

Same as I have but with the HK failover switch of which I use several already

Martin, your pointer to the HK failover switch was interesting, I hadn't spotted they did an own brand. PowerBox I know about, so I just went to look up the HK switch. The HK own-brand failover switch is (today) £13.42, but HK also stock the PowerBox (£58.78 from the international warehouse).

They look remarkably similar. The similarities don't end with just the looks though.... here's a quote from the PowerBox instructions:

"The total voltage loss in the PowerBox Sensor (de-coupling diodes and voltage regulators) is about 0.35 V, which is so low that the volume of waste heat is almost negligible. The specified maximum continuous current is 5.0 Amps, which means that it easily cope with 6 - 8 standard servos or 5 - 7 digital servos. However, the rated continuous current of 5.0 A does not reflect the capacity of the electronics; it is a function of the size of heat-sink employed. The electronic circuit is able to handle twice the specified power without problem. "

Here's a quote from the blurb for the Hobbyking own brand version:

"The total voltage loss in the HobbyKing Sensor is about .35v which is so low that the volume of waste heat is almost negligible. The maximum continuous current is 5A which means it can easily handle up to 8 servos. However the rated continuous current of 5A does not reflect the capacity of the electronics which can handle much more for short periods, depending on ambient air temperature."

Spot the difference... One of the things I do in my job is to review academic papers, and stuff like this jumps out. To me, these words are just a little too close for comfort.

geoffrehy Frost16/05/2018 17:29:06
2 forum posts
Hi all,
I am quite a way on with my build. Working out the cockpit design and lighting arrangements. I purchased 1/7 scale muppets which do not give much space above the battery. 1/8 scale would have been better. I also asked Tony for a clear nose cone so the led would shine through it. I hope it will arrive in the near future. I am currently on holiday.

Edited By geoffrehy Frost on 16/05/2018 17:29:37

Martin McIntosh16/05/2018 21:25:51
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2400 forum posts
930 photos

There is a very minor difference between the two switches but blowed if I can remember what it is. I think that the specs reveal it. I am told that the HK one is actually more reliable.

Mark Elen18/05/2018 19:28:43
327 forum posts
577 photos

Hi All,

Some good discussion going on above. It would be great to see some photos of your build Geoffery and welcome to the forum👍

I have been flying this afternoon, had a great few hours practising spins with the Ballerina. No wind whatsoever at times and it could have done with flaps, once it got into ground effect, it just wanted to float and float.

Got home and made up the mounts for the elevator servos, these are 1/8 ply and they now need sinking into the rear fuselage to hold the servo mounts themselves.

image.jpeg

image.jpeg

I screwed them together and made them as one then separated when I was happy with them.

Cheers

Mark

Mark Elen18/05/2018 19:28:44
327 forum posts
577 photos

*Double Post*

 

Edited By Mark Elen on 18/05/2018 19:31:11

Martin McIntosh18/05/2018 19:42:22
avatar
2400 forum posts
930 photos

Not quite the way I did it because I only have the arm sticking out but I await to see your end result.

Mark Elen19/05/2018 00:02:35
327 forum posts
577 photos

A little more done tonight:

image.jpeg

image.jpeg

image.jpeg

image.jpeg

I don't know why I've been putting this job off, it went really well and I'm very happy with the result.

Cheers

Mark

Mark Elen23/05/2018 14:15:38
327 forum posts
577 photos

Hi All,

Not got a lot done in the last few days, as I have been busy at work. I did get the fan formers fettled and the fan now slides in nicely.

image.jpeg

I had to take less than 1mm all around to get it to fit in.

I also had a major mishap whilst I was flying on Sunday. The foamie viper that I bought to get some EDF practice bit the dust. It flew a treat, but launching it was always been a bit 'hit and miss' on your own. Up until Sunday, I had always caught any wing drop on launch.

After seeing the review in this months RCM&E, I have ordered a Super Viper and intend to fit the flaps using the servos retrieved from the pile of bits I have, hopefully, this will give me the confidence to fly this when its finished.

Cheers

Mark

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