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Tony Nijhuis Harvard - Build Log

Electric powered

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Geoff Gardiner22/08/2019 11:17:59
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411 forum posts
718 photos

Thanks Nik.

I went into a bit more detail in my Spitfire build log here.

Pages 6-7.

Hope that helps.

Geoff Gardiner22/08/2019 11:41:38
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411 forum posts
718 photos

Hi Doug

I have sent you a PM.

Geoff Gardiner03/09/2019 23:44:46
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411 forum posts
718 photos

Designed and 3d printed some retract covers.

img_4269.jpg

More later...

Geoff Gardiner03/10/2019 23:43:36
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411 forum posts
718 photos

Bit more work done on the canopy:

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More later...

Nik Harrison04/10/2019 08:39:51
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77 forum posts
128 photos

Impressive work. Very nice.

Nigel R04/10/2019 09:04:41
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3102 forum posts
479 photos

That looks very smart, great work.

adrian garnham06/10/2019 15:38:25
6 forum posts

I am a new member and this is my first post !! This build log and your craftsmanship is second to none , I am about to purchase the harvard plan from Tony Nijhaus designs. Can you tell me what electric setup you have used and what retracts you ended up purchasing ?

Douglas Groutage06/10/2019 18:57:43
10 forum posts
3 photos

Looking good Geoff!

Geoff Gardiner06/10/2019 19:40:37
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411 forum posts
718 photos

Thanks gents.

Nearly there!

I am fitting all the electric gubbins now. I am using a failover switch for (LiFe) battery redundancy on the receiver.

I needed to make a mount, using my 3D printer, so that it will fit in the battery compartment :

img_4409.jpg

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Welcome to the forum Adrian. I will detail my electric setup in my next post.

More later.

Geoff...

Geoff Gardiner07/10/2019 11:57:07
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411 forum posts
718 photos

Hi Doug.

I have just emailed you those files.

Sorry it took so long.

Douglas Groutage07/10/2019 17:19:56
10 forum posts
3 photos
Posted by Geoff Gardiner on 07/10/2019 11:57:07:

Hi Doug.

I have just emailed you those files.

Sorry it took so long.

No issues Geoff. I’m no where near ready to print them. But thanks I did receive them!

Your build log is a good reference for me. It’s been invaluable to double check what I am doing.

Geoff Gardiner07/10/2019 22:27:46
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411 forum posts
718 photos

Hi Adrian.

These are the electric bits that i am using:

retracts here

Motor here

ESC here

Battery - 5S 5000mah Turnigy Graphene

Hope that helps.

Geoff...

adrian garnham08/10/2019 11:43:04
6 forum posts

Thanks Geoff

I've ordered the plans .... can't wait to get started.

adrian garnham08/10/2019 11:43:05
6 forum posts

Thanks Geoff

I've ordered the plans .... can't wait to get started.

adrian garnham08/10/2019 11:43:07
6 forum posts

Thanks Geoff

I've ordered the plans .... can't wait to get started.

Geoff Gardiner08/10/2019 11:50:28
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411 forum posts
718 photos

That's great Adrian, I think you will enjoy the build.

Are you going to do a build blog?

Geoff...

adrian garnham08/10/2019 21:15:33
6 forum posts

I would like to do a build log but will see how it goes

Geoff Gardiner08/10/2019 21:53:54
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411 forum posts
718 photos

Bit more done today:

Fixed the wasp engine onto its mounts

img_4429.jpg

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Next, the bit I've been dreading - test the CofG...

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Having moved the ESC and receiver batteries as far forward as they could go, it needed 120g of stick on weights to achieve the required CofG.

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As feared, it has come out a tad on the heavy side - 4.5kg including the flight battery.

The last thing to do is test the power and select a suitable prop.

More later.

Geoff...

Douglas Groutage08/10/2019 23:17:40
10 forum posts
3 photos

Use a 6S a little heavier?

The pilot needs to gain weight?

How much will the prop increase the leverage of CoG?

Doug

Geoff Gardiner09/10/2019 20:59:48
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411 forum posts
718 photos

Power testing today:

14x8 prop gives 1700W & 90A

13x8 prop gives 1550W & 83A

12x8 prop gives 1250W & 65A

These readings were at max throttle.

More later...

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