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RE: northstar help - 5/5/2008 11:17:33 AM   
Mustang Fever


 

Posts: 1199
Joined: 11/30/2003
From: Cadillac, MI, USA
Status: offline 		Congrats, Simon.

They both look nice. So.. the shim was 1/8" thick at the top and tapered to the bottom?

I'll have to try that on my drawings and see if I can make a propeller fit in the remaining space.

I've started a build thread on another one at:

http://www.rcuniverse.com/forum/m_7287178/anchors_7287178/mpage_1/key_laddie%252Carrow/anchor/tm.htm#7287178



< Message edited by Mustang Fever -- 5/5/2008 11:19:23 AM >

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RE: northstar help - 5/5/2008 1:25:03 PM   
Mustang Fever


 

Posts: 1199
Joined: 11/30/2003
From: Cadillac, MI, USA
Status: offline 		Simon:

I think I'll make a 1/8 shim like you did, only put it between the engine mount and the firewall, then move the engine mount up about 1/8" inch from plan. That should give the same thrust line and downthrust without the necessity of changing the angle on the upper pylon rib, etc. I should be able to shape the cowl so that everything comes out looking right.

I drew a 1/8 shim on my plans, and extended everything out. It measures at 3 degrees downthrust.

Do you have any information you could share on the C of G? There's a lot of discussion about that on this side of the pond. I know for certain that if one balances the A/C on the rearmost mark with an empty tank, that it will be uncontrollable in pitch. I'm considering balancing mine at about 11-12% of MAC with a FULL tank for the first flight.

Regards

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RE: northstar help - 5/5/2008 9:16:10 PM   
simhatus


 

Posts: 196
Joined: 12/28/2003
From: england, UNITED KINGDOM
Status: offline 		Hi Bob

thanks.

Yes 1/8" at the top tapered.

I'll check were the cg now is.

Simon

< Message edited by simhatus -- 5/6/2008 3:32:35 AM >

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RE: northstar help - 5/18/2008 6:26:19 PM   
simhatus


 

Posts: 196
Joined: 12/28/2003
From: england, UNITED KINGDOM
Status: offline 		Hi

Sorry for the delay will work out the cg shortly havn't forgotten.

Simon

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RE: northstar help - 5/18/2008 9:40:36 PM   
Mustang Fever


 

Posts: 1199
Joined: 11/30/2003
From: Cadillac, MI, USA
Status: offline 		Thanks, Simon.

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RE: northstar help - 5/23/2008 11:20:48 AM   
simhatus


 

Posts: 196
Joined: 12/28/2003
From: england, UNITED KINGDOM
Status: offline 		Hi

The cg for my arrow fully rigged with no fuel is 408mm from the trailing edge of the wing.

I picked the trailing edge of the wing to measure from as its likely to be somthing that dosn't vary on Individual models.

A further point to note is that my arrow does not have the wing strakes i decided to leave them off after flying somone elses arrow that flew well without strakes.

I think i'll go and find the plan and see how this compares to the suggested cg.

Simon

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RE: northstar help - 5/23/2008 1:56:24 PM   
Mustang Fever


 

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Joined: 11/30/2003
From: Cadillac, MI, USA
Status: offline 		Simon:

Is that from the elevon TE, or just the wing itself? (Measuring it out, I'm guessing you went from the TE without including the elevon)

Thanks much

< Message edited by Mustang Fever -- 5/23/2008 2:06:11 PM >

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RE: northstar help - 5/23/2008 4:50:54 PM   
simhatus


 

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Status: offline 		Hi

yes from the wing itself.

Simon

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RE: northstar help - 5/24/2008 1:36:12 AM   
Mustang Fever


 

Posts: 1199
Joined: 11/30/2003
From: Cadillac, MI, USA
Status: offline 		Thanks, Simon

I really appreciate it.

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RE: northstar help - 6/24/2008 1:54:14 PM   
Mustang Fever


 

Posts: 1199
Joined: 11/30/2003
From: Cadillac, MI, USA
Status: offline 		Simon:

I maidened the Arrow today, and couldn't be more pleased. It will take me all day to calm down. Thanks so very much for your help with CG. The complete story is on the other thread:

http://www.rcuniverse.com/forum/m_7287178/anchors_7654687/mpage_5/key_/anchor/tm.htm#7654687

Regards,

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RE: northstar help - 7/6/2008 8:44:24 PM   
erazz



Posts: 273
Joined: 5/9/2003
From: Haifa, ISRAEL
Status: offline 		Hi guys,

Is the Morris kit still available? Their website is down and I can't seem to reach them... Any idea?

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