Can the Mx7-180B do this?
-
- Posts: 8
- Joined: Wed Jan 08, 2014 8:48 pm
- Location: Graham-Texas
- Contact:
Can the Mx7-180B do this?
Hello all
-I am new to this forum-and in need of Maule advise!
I am looking to purchase a Mx7-180B for the following mission:
I will be primarily operating out of a 7600ft field elevation 8k+ length paved strip- I want to be able to stop in the back country strips for camping with my family, utilize unprepared surfaces, fly the sight seeing flights around the Rocky Mountains, be able to operate at field elevations of 10k at max gross- with the occasional cross country trips(3 hour plus reserve)
Now the limiting factors:
I am 6'3 280lbs
Wife 5'10 160lbs
2 kids- planning on 100lbs each to allow future growth- 200lbs total
100lbs of gear-
Will this work with weight and balance?
How will it preform at high altitude?
Is this the right aircraft for the mission?
Is there a better model for this mission?
Your opinions are appreciated!
-I am new to this forum-and in need of Maule advise!
I am looking to purchase a Mx7-180B for the following mission:
I will be primarily operating out of a 7600ft field elevation 8k+ length paved strip- I want to be able to stop in the back country strips for camping with my family, utilize unprepared surfaces, fly the sight seeing flights around the Rocky Mountains, be able to operate at field elevations of 10k at max gross- with the occasional cross country trips(3 hour plus reserve)
Now the limiting factors:
I am 6'3 280lbs
Wife 5'10 160lbs
2 kids- planning on 100lbs each to allow future growth- 200lbs total
100lbs of gear-
Will this work with weight and balance?
How will it preform at high altitude?
Is this the right aircraft for the mission?
Is there a better model for this mission?
Your opinions are appreciated!
-
- 100+ Posts
- Posts: 736
- Joined: Fri Nov 08, 2013 8:13 pm
- Contact:
Re: Can the Mx7-180B do this?
Will it work? Yes.JAM00 wrote:Hello all
-I am new to this forum-and in need of Maule advise!
I am looking to purchase a Mx7-180B for the following mission:
I will be primarily operating out of a 7600ft field elevation 8k+ length paved strip- I want to be able to stop in the back country strips for camping with my family, utilize unprepared surfaces, fly the sight seeing flights around the Rocky Mountains, be able to operate at field elevations of 10k at max gross- with the occasional cross country trips(3 hour plus reserve)
Now the limiting factors:
I am 6'3 280lbs
Wife 5'10 160lbs
2 kids- planning on 100lbs each to allow future growth- 200lbs total
100lbs of gear-
Will this work with weight and balance?
How will it preform at high altitude?
Is this the right aircraft for the mission?
Is there a better model for this mission?
Your opinions are appreciated!
If me and my wife, kids and gross weight at 10,000ft? NOPE, not with that precious cargo!
-
- 100+ Posts
- Posts: 736
- Joined: Fri Nov 08, 2013 8:13 pm
- Contact:
- Andy Young
- 100+ Posts
- Posts: 1547
- Joined: Wed Oct 05, 2011 7:10 am
- Location: Alaska, Antarctica, Colorado, and Others
- Contact:
To haul that kind of load at those altitudes, I think you'll really want the 235hp (or 260, if you have the coin).
Of course, that is a bit heavier, limiting the load somewhat...
That said, the 235 has a more forward empty CG, making it easier to carry the load within the allowable CG envelope.
I ran the numbers you gave on my M-6-235 (the M-6 actually has the same fuselage as the MX-7, unless I've misunderstood something). With that load in mine, I would be limited to 32 gallons of fuel, and the CG would be at 18.6 inches. The allowable range is 15.5 to 20.5, so it's very comfortably in there.
I do fly mine at gross fairly often, at high altitudes, but I would not want to do it with less power than I have.
Where in the Rockies are you? If you are close to me (I'm in Boulder, Colorado) you're welcome to come on by, and we can load up my plane similarly and I can show you how it flies.
Andy
Of course, that is a bit heavier, limiting the load somewhat...
That said, the 235 has a more forward empty CG, making it easier to carry the load within the allowable CG envelope.
I ran the numbers you gave on my M-6-235 (the M-6 actually has the same fuselage as the MX-7, unless I've misunderstood something). With that load in mine, I would be limited to 32 gallons of fuel, and the CG would be at 18.6 inches. The allowable range is 15.5 to 20.5, so it's very comfortably in there.
I do fly mine at gross fairly often, at high altitudes, but I would not want to do it with less power than I have.
Where in the Rockies are you? If you are close to me (I'm in Boulder, Colorado) you're welcome to come on by, and we can load up my plane similarly and I can show you how it flies.
Andy
-
- Posts: 8
- Joined: Wed Jan 08, 2014 8:48 pm
- Location: Graham-Texas
- Contact:
- TomD
- 100+ Posts
- Posts: 1361
- Joined: Sat Aug 26, 2006 7:13 pm
- Location: Seattle area ( S43 )
- Contact:
HP loss
I have seen this formula so lets use it to assume:
HP Loss = (elevation x 0.03 x horsepower @ sea level)/1000
If you plug in your elevation assuming no density altitude increase ( not likely) it looks like this:
HP- (8000 x 0.03 x 180)/1000 = 180hp - 43.2 = 136.8hp
Let's just for the hell of it say you have a density altitude of 10k which would not be an unreasonable day at your airport:
HP - (10000 x .03 x 180)/1000 = 180 - 54 = 126hp
Now I don't think this little equation takes the loss of propeller thrust or wing lift into account.
At an 8k altitude airport there is no substitute for horsepower.
A normally aspirated 235hp would leave you with 164.5 hp at 10k altitude.
I make no claims to the accuracy of this formula or calculations.
I use my handy old T.O.P. Comp calculator which takes in a number of factors to get an idea of performance at a particular field.
TD
HP Loss = (elevation x 0.03 x horsepower @ sea level)/1000
If you plug in your elevation assuming no density altitude increase ( not likely) it looks like this:
HP- (8000 x 0.03 x 180)/1000 = 180hp - 43.2 = 136.8hp
Let's just for the hell of it say you have a density altitude of 10k which would not be an unreasonable day at your airport:
HP - (10000 x .03 x 180)/1000 = 180 - 54 = 126hp
Now I don't think this little equation takes the loss of propeller thrust or wing lift into account.
At an 8k altitude airport there is no substitute for horsepower.
A normally aspirated 235hp would leave you with 164.5 hp at 10k altitude.
I make no claims to the accuracy of this formula or calculations.
I use my handy old T.O.P. Comp calculator which takes in a number of factors to get an idea of performance at a particular field.
TD
-
- 100+ Posts
- Posts: 1665
- Joined: Mon Feb 11, 2008 10:31 am
- Contact:
I would suggest a Turbo 206 or Turbo 182.
High, hot, heavy. Rooms for all. Semi-STOL out of the box and Robertson can make it a genuine STOL.
Or 2 Maules and have your wife get a pilot's certificate.
High, hot, heavy. Rooms for all. Semi-STOL out of the box and Robertson can make it a genuine STOL.
Or 2 Maules and have your wife get a pilot's certificate.
I am an AME in Richland, Washington. Please call for an appointment!
560 Gage Blvd.
Richland, WA 99352
(509) 628-2843
560 Gage Blvd.
Richland, WA 99352
(509) 628-2843
-
- 100+ Posts
- Posts: 736
- Joined: Fri Nov 08, 2013 8:13 pm
- Contact:
- Scott
- Posts: 60
- Joined: Mon Sep 06, 2010 7:57 pm
- Location: Reno, NV
- Contact:
high mountian flying
I took a cross country in my MX7-180A from KBLI to Moab UT then to Durango CO last summer and the density alt was reported 10800 with the outside air temp around 96 deg, I was concerned about performance but with full fuel, 42gal, my wife, dog, luggage for the week and myself it did great. a little bit longer ground roll and climb out was slow ( about 200-400 FPM max) I was impressed. It even handled high 25 gusty x-wind landings on the stops along the way. I would do it again. Enjoy and be safe,,,,
Scott,
CFI, MX7-180A
CFI, MX7-180A
-
- 100+ Posts
- Posts: 1665
- Joined: Mon Feb 11, 2008 10:31 am
- Contact:
Good thought! Add amphibs and you're good to go!MauleMechanic wrote:There is the 420Mountain Doctor wrote:I would suggest a Turbo 206 or Turbo 182.
High, hot, heavy. Rooms for all. Semi-STOL out of the box and Robertson can make it a genuine STOL.
Or 2 Maules and have your wife get a pilot's certificate.
I am an AME in Richland, Washington. Please call for an appointment!
560 Gage Blvd.
Richland, WA 99352
(509) 628-2843
560 Gage Blvd.
Richland, WA 99352
(509) 628-2843
Who is online
Users browsing this forum: No registered users and 21 guests