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May 11, 2018, 07:46 AM
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cracksmeup's Avatar
Quote:
Originally Posted by oscarmok
Hello,

Recently I bought a Twin Otter off someone from the net. He mentioned this is from Ivan Pettigrew Twin Otter 600 plan.

Unfortunately, I haven't ask what's the CG of this plane.

Can someone who built the Twin Otter 600 plan can tell me what's the CG of this plane please?

Greatly appreciated.
Oscar
I havenít finished mine yet as some health issues got in my way , I will get out my plans and check for you tomorrow tho . Joe
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May 11, 2018, 08:00 AM
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Quote:
Originally Posted by cracksmeup
I havenít finished mine yet as some health issues got in my way , I will get out my plans and check for you tomorrow tho . Joe
Much Appreciated, Joe!
May 11, 2018, 08:28 AM
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cracksmeup's Avatar
Quote:
Originally Posted by oscarmok
Much Appreciated, Joe!
No problem sir .. joe
May 14, 2018, 01:45 PM
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cracksmeup's Avatar
Quote:
Originally Posted by oscarmok
Much Appreciated, Joe!
Sorry for the late reply iam half way through building me a new workshop and hard to find stuff . The CG is 2 3/4 inches from the leading edge of your wing . Joe
Last edited by cracksmeup; May 14, 2018 at 01:51 PM.
May 14, 2018, 01:52 PM
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Joe, Much appreciated. Thank you.
May 14, 2018, 02:02 PM
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cracksmeup's Avatar
Quote:
Originally Posted by oscarmok
Joe, Much appreciated. Thank you.
Anytime sir anything for a Ivan’s plane flyer :-) iam getting back to building two more of his planes real soon . Joe
Today, 03:08 AM
Registered User

Sealand Test Flight - Problems


I have tried a test flight on my Sealand. She is slightly nose heavy at 25% chord. On take off she climbed almost vertical. I got her level and a slight touch of the throttle and she was vertical again.

It is quite difficult to measure the thrust line of the motors but it seems close to plan.

Can anyone advise me on sorting this out ?

Leslie
Today, 03:19 AM
Registered User
Trevorh's Avatar
Thrust line is unlikely to be an issue. I suspect that you have too much up trim.

Trim it to fly level nice and slowly then just push forwards into a shallow dive and release the stick. If it pitches up sharply, you now know that the pitching is due to increased speed not thrust. This would be a sure sign that the model is nose heavy, so is requiring too much uptrim to fly level at low speed. Go faster and this uptrim pitches you up.

Trevor
Today, 07:16 AM
Registered User
Thanks. I will check it later in the week.


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