Mar 17, 2019, 12:44 PM Registered User 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
Mar 17, 2019, 08:06 PM
Registered User
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 Registered User Thread OP Today I noticed there is no CG marked on the plans. This can be solved.
Mar 17, 2019, 08:20 PM
Registered User
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 Registered User 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
Registered User
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 Registered User Thread OP 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 Registered User Mine might not be the same says traced by Harold Osborne 1980 but drawn by Lund
Apr 25, 2019, 12:20 PM
Registered User
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
Registered User
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.

### Files

Last edited by jasbury1; Apr 27, 2019 at 06:20 PM.
 Apr 28, 2019, 10:39 AM Registered User Excellent thanks!
 Apr 30, 2019, 11:20 AM Brooklynite In Texas Looking good jas!
May 06, 2019, 08:00 AM
Registered User
Quote:
 Originally Posted by donnyman Looking good jas!
Thank you!
 May 10, 2019, 06:28 PM Registered User Thread OP Starting to install servos and put together linkages. Connecting a pushrod to the elevator is proving challenging. Good thing I cut this slot earlier. Sent from my iPod touch using Tapatalk
 May 12, 2019, 11:32 PM Registered User Thread OP Wing flying wires installed. Sent from my iPod touch using Tapatalk Last edited by jasbury1; May 12, 2019 at 11:39 PM.