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Member postings for Lucas Hofman

Here is a list of all the postings Lucas Hofman has made in our forums. Click on a thread name to jump to the thread.

Thread: 2013 Mass Build - general chat thread
26/12/2012 12:54:35

It was not my intention to start à "glue" war...

The common denominator is Aliphatic resin, which I hav enever used. Hopefully I can get hold of it in Norway.

I have used a lot of epoxy in boat building, but that is both heavy and too stiff for balsa, thereby creating a weak spot just beside the join. Good for firewalls and ply-balsa seams though.

My limited experience with CA glue is that the gluelike is less elastic than the materials glued, which creates hard spots in the construction. When glueing stiff materials (like carbon rods) this is not an issue. However, the wicking that thin CA does makes it possible, in theory, to position parts in place and then apply glue. With CA hinges this works fine, but I have never tried this with balsa constructions. How do you know if there is glue in the whole glueline?

Great Planes recommend CA glues in their kit manuals though, so it can not be all bad. I will try them all, and will most likely develope a preference after a while, like the builders that responded to my initial post.

25/12/2012 15:33:10

The last kit I build (35 years ago) was build with UHU-hart. I read about many other glues now, and have not entirely positive experience with CA glues.

What kind of glue do people (intend to) use and why?

Regards, Lucas

Thread: Phil Winks' Tucano
14/12/2012 15:00:09

Phil, you might have written it before but why do you intent to backmount the motor? Front mounting is a lot easier here, or do I miss something?

Regards, Lucas

Thread: 2013 Mass Build - general chat thread
13/12/2012 12:44:22

Robin, Nigel, Wolstonflyer, codename-john,

Thanks for all the tips on making rondells and other decals. Taking part in this mass-build is a very effective way to gain a LOT of new knowledge!

Lucas

ps. My son has decided on the colorscheme (http://www.raf.mod.uk/tucanodisplayteam/gallery/2008gallery.cfm), so the compass cutter will come in handy.

09/12/2012 20:42:52

Off course, anybody else having tips how to do decals is very welcome to comment!

09/12/2012 20:37:37

Nigel, how did you make (or where did you purchase) the nice decals shown in the article?

Thread: Phil Winks' Tucano
07/12/2012 08:48:45

You are right here Phil. I have one plane I fly with different batteries dependent on how much it blows. I have to retrim with the heavy battery but it has then more "punch". On a quiet evening however it is a delight to be able to fly slow and gracefull.

With regard to your removable wing design:

1. Would it not be easier (and lighter) to use 4 nylon bolts to fix the wing and do away with the ply plate with the tongue?

2. The balsa in the wing will crush easely due awound the bolt. Should there not be a small ply plate at the underside of the wing to spread the load generated by the bolt?

Regards, Lucas

05/12/2012 22:11:14
Posted by Phil Winks on 05/12/2012 18:46:07:
Posted by Lucas Hofman on 05/12/2012 12:46:05:
Posted by Lucas Hofman on 04/12/2012 22:40:16:

Phil, Thanks for the PDF.

Have you thought about what battery to use? I put the Tucano into Motocalc and it looks like a 3 cell 2200mAh LiPo will provide about 10 minutes on 70% throttle. With a 10x6 prop it will draw about 30A with the motor I intend to use (Powerpro 2820-5 1150kv - roughly equiv. to the AXI 2820).

Lucas no prob with the PDF keep an eye out for the next edition detailing my placement of bty tail servos and rx.

Regarding the bty simply as big as you can fit in, the larger the mah figure the longer the fun lasts

Phil

Phil, the latter may not be completely true: the smaller the battery, the lighter the plane which means better performance, both around stall speed and vertical. Especially if one can use a smaller engine, ESC etc. too. After 8-10 min. It is usually ok to take a brake and swap a battery.

Lucas

05/12/2012 12:46:05
Posted by Lucas Hofman on 04/12/2012 22:40:16:

Phil, Thanks for the PDF.

Have you thought about what battery to use? I put the Tucano into Motocalc and it looks like a 3 cell 2200mAh LiPo will provide about 10 minutes on 70% throttle. With a 10x6 prop it will draw about 30A with the motor I intend to use (Powerpro 2820-5 1150kv - roughly equiv. to the AXI 2820).

Assuming an airframe weight of 750 gram all up weight will be 1100 gram. Max trust is 1250 gram, so vertical climb out should be ok.

Regards, Lucas

Please ignore, just found out there is a power train thread...

04/12/2012 22:40:16

Phil, Thanks for the PDF.

Have you thought about what battery to use? I put the Tucano into Motocalc and it looks like a 3 cell 2200mAh LiPo will provide about 10 minutes on 70% throttle. With a 10x6 prop it will draw about 30A with the motor I intend to use (Powerpro 2820-5 1150kv - roughly equiv. to the AXI 2820).

Assuming an airframe weight of 750 gram all up weight will be 1100 gram. Max trust is 1250 gram, so vertical climb out should be ok.

Regards, Lucas

Thread: 2013 Mass Build - general chat thread
04/12/2012 22:07:23

Some advice wanted: here in Norway we have balsa in metric sizes. I wonder whether the 3/16 (4.5mm) for the tail surfaces and the fuselage sides best can be replaced by 4 or 5mm?

Regards, Lucas

04/12/2012 22:04:13

My plan arrived a few days after the canopy.

Lucas

Thread: Tucano Signing Up Thread
04/12/2012 22:02:29

Tor Ernst Hofman (my son) will build one. This is his first build and maybe the first one to be build in Norway.

Thread: Phil Winks' Tucano
22/11/2012 12:12:01

Phil, how heavy is soft, med and hard balsa.? I can take a scale with me to the local shop but have to know what are acceptable weigths...

Regards, Lucas

Thread: 2013 Mass Build - general chat thread
21/11/2012 14:08:47

I found out about the wing area on myhobbystore.

Does anybody know if the decals shown on the planes in the article can be ordered somewhere?

And any good suggestions for the pilot figures?

21/11/2012 07:55:14

What is the wing areal for the Tucano? Preferably including the area of the wing covered by the fuselage. I cannot find it published anywhere.

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