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Tony Nijhuis Harvard - Build Log

Electric powered

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Geoff Gardiner23/09/2018 21:27:16
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327 forum posts
569 photos

Next up on the building board is the Tony Nijhuis Harvard. I am hoping it will be a quicker build than the Mosquito, which took me 2 years.

This will be built for electric power and possibly with a sound system.

I am still pondering battery position - will try and get it as far forward as possible.

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Cut the parts from the laser/cnc sheets.

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Then started with the fuselage.

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More later...

jez23/09/2018 21:49:14
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243 forum posts
126 photos

hi geoff

i have been building the same , nearly finished ! enjoy jezimg_3034.jpg

Biggles' Elder Brother - Moderator23/09/2018 21:57:33
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Moderator
15748 forum posts
1460 photos

Nice, this will be interesting. I've always fancied a Harvard. Mind you, like most modellers, I can probably say that about 40 different prototypes!

BEB

Geoff Gardiner23/09/2018 22:00:14
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327 forum posts
569 photos

That looks fantastic Jez. I have just had a look at your album.

I may be asking questions as my build progresses - if that is OK.

jez23/09/2018 22:03:06
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243 forum posts
126 photos

yea no problem any time

Geoff Gardiner24/09/2018 23:05:01
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327 forum posts
569 photos

Thanks Jez.

First question is:

What motor and battery are you using and did you manage to get the CofG correct without having to add extra weight?

Cheers.

Geoff...

oh...... and what is the all up weight (mine always come out on the porky side)?

Broken Prop25/09/2018 20:26:00
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566 forum posts
1 photos

I've put this build in my diary Geoff. Glad to see it underway and look forward to more details.

Pete

jez25/09/2018 22:01:56
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243 forum posts
126 photos

hi geoff,

ok, i am using the 4max set up as recommended 595 kv on 4 cell lipo, 14x7 prop

i have built in to the front of the fuz a sloping tray for the lipo and a removable cockpit as well see the pictures below , the all up weight at the mo is bang on 3.5 kg and the c of g is not far out but i haven't fine tuned it yet as need to put the wing servos in so will need a bit of weight in the front yet

hope this helps

regards jez

jez25/09/2018 22:05:21
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243 forum posts
126 photos

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Geoff Gardiner25/09/2018 22:27:46
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327 forum posts
569 photos

Thanks for the pictures Jez - that is very useful info. Good luck with the maiden.

The rest of the formers have been glued in this evening.

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Geoff Gardiner26/09/2018 22:08:46
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327 forum posts
569 photos

Tail post and top stringers going on tonight.

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Charles Galloway26/09/2018 22:57:14
100 forum posts
29 photos

What retracts have you planned on using?

Geoff Gardiner27/09/2018 21:49:17
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327 forum posts
569 photos

Hello Charles.

I have a set of these so will probably try them and see how they perform.

Bottom stringers going on tonight.

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Geoff Gardiner06/10/2018 12:41:18
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327 forum posts
569 photos

Bottom sheeting going on today:

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Percy Verance07/10/2018 13:08:33
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7098 forum posts
142 photos

A little tip Geoff.

If you haven't already done it, build a small box as far back as you can on the underside of the fus ( under the tail is good ) fit a little screwed on lid. Should you need to add weight at the rear, fishing weights can go in the little box, packed in with a small pad of blue foam. Much tidier than those stick on weights on the outside.... That said, the Harvard has a short nose, so there may not be any tail weight needed.

I do the same with the underside of the port wing tip on models with a side mounted engine, just in case they need a bit of weight to balance the engine cylinder.... this one did, and the weight is screwed to the hatch. The hatch looks bigger than it is. It's about postage stamp size.

Here.....

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I hate to rain on your parade Geoff, but I'd be surprised if those retracts were up to the job.......I'd expect to pay 10 times that or more.......

 

 

 

 

 

 

Edited By Percy Verance on 07/10/2018 13:21:06

Geoff Gardiner07/10/2018 20:31:20
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327 forum posts
569 photos

Thanks Percy, an interesting tip. I think I will probably need nose weight though.

I will take a view on the retracts when I get to building the wing.

A little more done today:

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More later...

Geoff Gardiner09/10/2018 20:26:31
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327 forum posts
569 photos

Bit more done:

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Next job is to sort out where the battery is going.

Geoff Gardiner10/10/2018 22:51:38
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327 forum posts
569 photos

Made a start on the battery box tonight.

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I think I will drill some weight reducing vent holes before gluing it together.

More later...

Geoff Gardiner13/10/2018 17:11:41
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327 forum posts
569 photos

I had to trim the former to fit the battery box before gluing in.

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More later...

Geoff Gardiner17/10/2018 21:43:29
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327 forum posts
569 photos

I have made up a motor mount which is fixed with four M6 threaded bars.

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Also, top sheeting going on.

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More later...

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