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Feb 12, 2013, 05:02 PM
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RMCCOR7737's Avatar
Build Log

40" Fiat CR-32 Scatch Build and Electric Conversion


I feel like a child torn between divorced parents... I used to hang out in the scale electric forums then Balsa Builders forum. Now I'm torn between the two as to which to post build logs to... Maybe I'll post a link to this thread from there?

Anyway, I ran across some nice plans for a CR-32 by an Italian designer. Of course it was all in Italian. I managed to translate enough to get the gist of the instructions. The rest will be left up to my imagination..
The best I can decipher metric materials to good ol' USA measures are as follows:

1mm = 1/32
1.5mm = 1/16
2mm = 3/32
3mm = 1/8
4mm = 5/32? not much balsa in this size I could find...
5mm = 3/16
6mm = 1/4

Best I can figure anyway. I want to get a materials list together this week so I can get it ordered. If someone could verify my interpretations are correct for me, I would greatly appreciate it.

Specs on the CR-32 are as follows:

Wing Span = 40"
Weight = 44 oz.
Wing Area = 372 in/sq
Wing Loading = 17 oz/ft sq

Originally designed for an OS LA 15. I may go with a .15 Exceed motor on a 3s battery. Will be determined by weight once I get that far...
Last edited by RMCCOR7737; Mar 24, 2013 at 07:50 PM.
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Feb 12, 2013, 06:05 PM
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mistairjoe's Avatar
1/32=.84mm.1/16=1.5mm.5/64=2mm.1/8=3.25mm.5/32=4mm.3/16=4.77mm.1/4=6.40mm.
Feb 12, 2013, 06:18 PM
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mistairjoe's Avatar
Nice plan.Who is the designer.Worst come to worst i could redraw some parts in ACad and have it laser cut.Joe
Feb 12, 2013, 06:26 PM
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Quote:
Originally Posted by sarkantyu View Post
Nice plan.Who is the designer.Worst come to worst i could redraw some parts in ACad and have it laser cut.Joe
Thanks Joe. I am to assume when ordering wood I use my interpretations?
The plans are by Ruggero Pantini Pantani. I was going to try to make CAD cut sheets to send to Manzono Laser (Charlie) I am doing them in Photo Shop now and I was going to trace in CAD. I am not at all familiar with CAD. I was going to learn on the fly........
Last edited by RMCCOR7737; Feb 13, 2013 at 03:26 AM.
Feb 17, 2013, 07:24 PM
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I have been working on the cut files. Not sure how they will look when cut though. I could have had all the parts cut by hand already. I like learning to use CAD though. Maybe I will have it ready for next year...
Feb 24, 2013, 08:42 PM
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As with any addiction, I just could not resist. I needed my balsa fix and working on the cut files was just taunting me. I ran out Saturday evening and got some balsa, and today began to butcher it into what I hope will resemble a CR-32. Beings I am doing an electric version I am making some modifications as far as the materials used in attempt to lighten the load a little. The plans called for an all plywood fuse box structure. I used a combination of 1/8 balsa and basswood, except for the firewall which I did use birch ply. I will wait to get a little further along before deciding on the power system to be used. I was a little apprehensive to begin this build as it is Italian and all metric but I think I have most of the major obstacles thought out, at least in my mind which fails me some times.....
Feb 25, 2013, 07:44 PM
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Had about an hour to work on the Fiat today. Finished the lower front fuse formers and added the rest of the spars to the front. I just wanted to get it off the board.
Feb 26, 2013, 09:00 PM
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Worked on the top formers a little today. I do not have much time during the week to concentrate on building, maybe an hour in the evenings. I am going to try to do a little every day if possible. Not sure if I am going to continue posting updates though due to the seemingly lack of interest. I may post the finished product if it turns out though.
Feb 26, 2013, 10:24 PM
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Looks good. I took a close look at photo #6 and you are doing good work. John
Mar 08, 2013, 08:19 PM
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Working on sheeting fuse...
Mar 10, 2013, 09:05 PM
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Only progress today was the servo tray. Spent most of the day re-organizing work space....


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