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Tony Nijhuis Harvard - Build Log

Electric powered

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jez09/12/2018 21:57:11
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245 forum posts
137 photos

getting on well geoff hoping to fly mine over xmas if weather is ok !

Geoff Gardiner28/12/2018 21:35:01
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389 forum posts
683 photos

Bit more work done on the wings:

Sheeting finished, wheel wells lined and outer leading edges added.

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I have also designed and 3d printed a 9 cylinder 'Wasp' engine.

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More later...

daniel handley28/12/2018 22:00:18
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71 forum posts
18 photos
Looking good geoff. The 3d cylinder will be a nice touch.

Dan
Martian31/12/2018 16:39:17
2217 forum posts
1091 photos

lovely work Geoff plus the 3D printed engine. which Wasp version is that ?

Geoff Gardiner03/01/2019 11:19:11
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389 forum posts
683 photos

Hi Martian.

It is loosely based on the R-1340 Wasp engine by Pratt & Whitney.

I was going for a 'hint' of wasp rather than an exact replica.

Martian03/01/2019 13:26:52
2217 forum posts
1091 photos

The R1340 is a nice looking engine and yours looks a good likeness ,I printed the wasp r2800 for a Tigercat project i hope to start after building the fury

Geoff Gardiner13/01/2019 20:54:04
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389 forum posts
683 photos

Bit more done:

wings just need filling and final sand.

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Wing fairings ready for a bit of filler and battery hatch sorted.

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More later...

Geoff Gardiner26/01/2019 13:38:54
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389 forum posts
683 photos

Tailplane and fin glued on today.

It's getting there!

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Geoff Gardiner26/01/2019 13:39:35
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389 forum posts
683 photos

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More later...

Geoff Gardiner17/02/2019 18:07:23
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389 forum posts
683 photos

Tail end is finished. I had to build the rudder twice as the first one warped.

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What have people done for the tail wheel. There is no reinforcement built into the fuselage!

I knocked this up with my 3d printer:

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The M4 bolt has some fuel tube around which acts as a shock absorber (of sorts). It's castering, as suggested on the plan, but can be fixed if it proves too unstable (weather cocking). The fairing will just epoxy to the bottom of the fuselage - not sure how strong this will prove.

More later...

Geoff Gardiner18/02/2019 14:42:40
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389 forum posts
683 photos

Put all the bits together for the first time - everything is just balanced.

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I'm finding the canopy a bit of a challenge to trim!

Covering next.

More later...

Nigel R18/02/2019 15:44:14
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3046 forum posts
475 photos

Proper job, looks ace.

Chris Freeman 319/02/2019 13:52:31
255 forum posts
320 photos

Great work, I will be watching the progress

Former Member19/02/2019 16:04:39

[This posting has been removed]

daniel handley19/02/2019 18:22:01
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71 forum posts
18 photos

Hi geoff

That looks fantastic!

Geoff Gardiner19/02/2019 18:38:02
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389 forum posts
683 photos

Thanks chaps.

Geoff Gardiner24/02/2019 13:42:01
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389 forum posts
683 photos

Made a start with the covering today. I am using Bucks Composites Glass Fibre and resin.

The first job is to seal the wood with a thinned coat of the resin. This is to stop the wood absorbing the resin when you apply the glass and prevent 'pin holing'.

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I can never seem to achieve the stated target weights with my builds. This time I am going to weigh the air frame before and after covering and after painting, just to see.

I have also weighed everything that will be going into the air frame.

The grand total before covering and painting is 3.6kg.

The weight stated on the plan is 3.7kg so it looks like I will be overweight again.

The differences from Tony's version is that mine is electric, so I have added a ply battery box. I have also included the weight of the battery (a 5S Graphene, which adds 776g to my figure). I am not sure if Tony's 3.7kg included a full tank of fuel. I have also added some 3d printed detailing which adds 165g.

It will be interesting to see how much weight glassing and painting adds.

Tony's model was also covered with Easycoat film which would be lighter - I thought long and hard about this but I just prefer a glassed and painted finish.

More later...

Geoff Gardiner02/03/2019 13:50:04
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389 forum posts
683 photos

Glass fibre going on this weekend:

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More later...

Geoff Gardiner17/03/2019 21:13:34
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389 forum posts
683 photos

Glassing is finished and sanded.

Starting to add some 3d printed bits before painting:

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More later...

Geoff Gardiner21/03/2019 18:51:38
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389 forum posts
683 photos

I wasn't happy with the first Air vent that I made so I have redesigned it to make it more 'scale like'.

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