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Mar 17, 2019, 12:44 PM
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Very nice work on this biplane. I have admired Harold's plans for a long time and wish the best to you with the build.

Joe
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Mar 17, 2019, 08:06 PM
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Quote:
Originally Posted by piperjoe
Very nice work on this biplane. I have admired Harold's plans for a long time and wish the best to you with the build.

Joe
Thank you!
Mar 17, 2019, 08:07 PM
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Today I noticed there is no CG marked on the plans. This can be solved.
Mar 17, 2019, 08:20 PM
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Quote:
Originally Posted by jasbury1
Today I noticed there is no CG marked on the plans. This can be solved.
Found these:

https://www.modelairplanenews.com/balancing-biplanes/

https://rclibrary.co.uk/title_details.asp?ID=1433
Mar 20, 2019, 07:41 PM
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I have a set of these plans at least I think they are the same ones 1/4 scale christen eagle II. My plans have cg marked on fuselage side view. I can measure it if you need it. I was wondering if anyone had a bill of material for the wood parts? It would save me a lot of time figuring it all out before ordering wood.
Apr 20, 2019, 01:55 PM
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Quote:
Originally Posted by Garrace
I have a set of these plans at least I think they are the same ones 1/4 scale christen eagle II. My plans have cg marked on fuselage side view. I can measure it if you need it. I was wondering if anyone had a bill of material for the wood parts? It would save me a lot of time figuring it all out before ordering wood.
Are you sure the plans you have are the 1979 Harold Osbourne drawn edition? If they are I would be interested to learn where the CG is marked on your plans.
Apr 20, 2019, 02:00 PM
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Calculated wing area of my model:

Top - 472.50 in^2

Bottom - 489.47 in^2

Total 961.97 in^2

Ratio of wing area top/bottom - 0.491
Apr 21, 2019, 01:51 PM
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Mine might not be the same says traced by Harold Osborne 1980 but drawn by Lund
Apr 25, 2019, 12:20 PM
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Quote:
Originally Posted by Garrace
I have a set of these plans at least I think they are the same ones 1/4 scale christen eagle II. My plans have cg marked on fuselage side view. I can measure it if you need it. I was wondering if anyone had a bill of material for the wood parts? It would save me a lot of time figuring it all out before ordering wood.


I kept a list of material I have purchased. I do have some left over wood. Will put together a BOM and post in this thread.


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Apr 27, 2019, 06:14 PM
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Here is a list of supplies I purchased for this project. This is not a full bill of material. This does not include electronic components.

Hope it helps get you started.
Last edited by jasbury1; Apr 27, 2019 at 06:20 PM.
Apr 28, 2019, 10:39 AM
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Excellent thanks!
Apr 30, 2019, 11:20 AM
Brooklynite In Texas
Looking good jas!
May 06, 2019, 08:00 AM
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Quote:
Originally Posted by donnyman
Looking good jas!
Thank you!
May 10, 2019, 06:28 PM
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Starting to install servos and put together linkages.

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Connecting a pushrod to the elevator is proving challenging. Good thing I cut this slot earlier.
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May 12, 2019, 11:32 PM
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Wing flying wires installed.

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Last edited by jasbury1; May 12, 2019 at 11:39 PM.


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