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 Post subject: M350 CG Problem
PostPosted: 13 Mar 2021, 09:47 
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Joined: 09/15/12
Posts: 166
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Aircraft: Bonanza TN A36
M350 drivers what am I missing? I have been doing Weight and Balance scenarios for an M350 and it looks like it has a forward CG limit issue. If one needs full fuel it is very difficult not to exceed the forward CG limit. For example, with full fuel and 180 lbs. pilot and 180 lbs. copilot even with 100 lbs. in rear baggage compartment the plane is outside the forward CG limit. Reducing fuel from 120 gallons to 80 gallons solves this problem but with the thirsty Lycoming engine limits trips to shorter legs.

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TN A36 Bonanza
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 Post subject: Re: M350 CG Problem
PostPosted: 13 Mar 2021, 10:01 
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Joined: 09/29/10
Posts: 5681
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Company: USAF Simulator Instructor
Location: Wichita Valley Airport (F14)
Aircraft: Bonanza G35
Simple fix: If you’ve got the gross weight, put more baggage in the back. A case of oil, a tie-down kit, a tool kit, anything reasonably useful to move the CG back. Or have the pax sit in the back seat.

More difficult fix: weigh the airplane. This is a double-edged sword. You might find the empty weight and CG are worse than the numbers you have now. But at least you’ll know.

Expensive fix: replace forward equipment with lighter versions or move it back. Panel avionics, battery, prop, vacuum pump, alternator, air conditioning, are all potential candidates. Bring a big checkbook.

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 Post subject: Re: M350 CG Problem
PostPosted: 13 Mar 2021, 12:19 
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Joined: 03/15/16
Posts: 695
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Location: Charlotte NC
Aircraft: Piper Mirage
Have the passenger sit in the back for take off. Once in cruise. Switch seats after 30 min of flying which will burn 10-15 gallons.

Ive never had this problem with only 2 passengers in my 1995 pa-46. But it gets tough once you have bags and 4 passengers for sure.


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 Post subject: Re: M350 CG Problem
PostPosted: 13 Mar 2021, 12:32 
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Joined: 02/27/08
Posts: 3167
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Location: Galveston, TX
Aircraft: Malibu PA46-310P
It takes very little weight in the rear baggage compartment to overcome forward CG. My 1984 is on the edge forward cg with full fuel and two people up front. I am guessing the Mirage/M350 is a bit heavier up front due to the Lycoming engine.
Kevin


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 Post subject: Re: M350 CG Problem
PostPosted: 13 Mar 2021, 13:10 
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Joined: 08/16/15
Posts: 2868
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Location: Ogden UT
Aircraft: Piper M600
What you are looking at is not a CG issue but a weight for a given CG issue. So you will be well within CG but there is a ramp on the forward part of that curve. Moving the front seat passenger to the back for take off will fix the problem. I would say that this part of the WB curve is probably one of the more ignored parts of the curve. Think about every M350 that flies out of Vero with a new owner and instructor in the right seat, and Piper always sends the planes out topped with fuel. ;) The plane might stall a knot or 2 above the certification numbers with that WB.

I have the opposite problem with the M600. They tend to be tail heavy. Maybe if they took the nose of the M350 and the tail of the M600???? Naaaah, that wouldn't work.

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Chuck Ivester
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Ogden UT


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 Post subject: Re: M350 CG Problem
PostPosted: 27 Nov 2022, 20:16 
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Joined: 09/26/22
Posts: 101
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Location: XQU Qualicum
Aircraft: Bonanza
As I am seriously considering an M350, good to know.

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 Post subject: Re: M350 CG Problem
PostPosted: 28 Nov 2022, 01:13 
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Joined: 06/17/14
Posts: 4894
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Location: KJYO
Aircraft: C-182, GA-7
The Arrow is that way as well! Any more than 400 pounds in the pilot seats and we are tossing a 45 pound weight in the back and belting it in!


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 Post subject: Re: M350 CG Problem
PostPosted: 28 Nov 2022, 10:14 
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Joined: 03/24/12
Posts: 79
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Aircraft: 8KCAB / C510
I have a Meridian and I need ballast in the baggage unless I'm carrying passengers in the back. I use two 25lb lead shot bags for the task. They are small and easy to take in and out.


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