M5 vs M7 wing performance

NZMaule · Post by **NZMaule** » Sat Jul 05, 2008 11:52 pm

Just wondering if anyone has worked out relative performance differences (% or TO and landing distances) attributed to the M7 wing compared to the M5 wing i.e. a M5 180c compared with Mx7-180b, same weight, same field, same pilot, same conditions. I see some talk about cruise speeds and takeoff performance but can't find any "relative" differences between the two.

a64pilot · Post by **a64pilot** » Sun Jul 06, 2008 7:18 am

Too many variables. I wouldn't be surprised if at a light weight and on a cool day at sea level if a 5 wouldn't T/O shorter than a 7, but make it heavy, hot and high and things will change.
Just like I bet there are conditions wher a 180 will out perform a 235 also.

M5guy · Post by **M5guy** » Fri Jul 11, 2008 10:35 am

I'd rec you talk to Rick at Montanabyair@yahool.com. He put M7 wings on an M5 recently and could give you some feedback on performance differences. I know the longer wings allow a slower approach speed but what other differences I'm not sure.

a64pilot · Post by **a64pilot** » Fri Jul 11, 2008 12:33 pm

I want to think when you install the universal wing on an M5, your converting it to an M6.

Hottshot · Post by **Hottshot** » Fri Jul 11, 2008 3:03 pm

a64pilot wrote:I want to think when you install the universal wing on an M5, your converting it to an M6.

MX7 is what you'll get with that combo but find a A model wing you get a M6..... At least that is what we got. (placard from Maule)

Hottshot · Post by **Hottshot** » Fri Jul 11, 2008 3:10 pm

NZMaule wrote:Just wondering if anyone has worked out relative performance differences (% or TO and landing distances) attributed to the M7 wing compared to the M5 wing i.e. a M5 180c compared with Mx7-180b, same weight, same field, same pilot, same conditions. I see some talk about cruise speeds and takeoff performance but can't find any "relative" differences between the two.

If it is pre 93'(could be 94) you will have the same wing overall (30') but have the TT flaps to get the Uni wing it would have to be after that, so again to many vairables.....

Haveing had the wing change done here on Bill's M5 I can tell you the slowflight is nice but sometimes he misses the short wing for the ablity to realy get the sink you need sometimes.

a64pilot · Post by **a64pilot** » Fri Jul 11, 2008 3:16 pm

Aren't their two different model M-6's? My early model has the short ailerons, droop tips like a 5 and the short chord rudder, like a 5. I thought the conversion from 5 to 6 was the universal wing and longer chord rudder like on the late model 6? What kind of wing tips do you have Wup?

Hottshot · Post by **Hottshot** » Fri Jul 11, 2008 4:19 pm

The Droop tips were on the early 6's then they changed to the current style with the short aileron and changed again to the 60" aileron. Bill has the square tips and modifided aileron (short)

maules.com · Post by **maules.com** » Fri Jul 11, 2008 7:36 pm

Wings 101
Early M4 round tip 29'10" 70.5" flap 0/15/35deg ?" aileron
later M4 30'10" droop tip, 70.5 15/35 then 0/20/40 flaps, 69.5" aileron
M5 30'10" droop tip, 90" 15/35 & 0/20/40 flaps, 61.6"x15" aileron
81-86 M6 32'11" droop tip, 120" -7/0/24/40/48 flaps, 51.2"x16.25" aileron
1986 on M6 32'11" sqr tip, 120" -7/0/24/40/48 flap, 54.6"x17" aileron
'84/93 MX7 30'10" sqr tip, 109.4" -7/0/24/40/48 flap, 53"x17" aileron
'93 on MX7 32'11" sqr tip, 119" -7/0/24/40/48 flap, 60"x17" aileron
MXT and MT 32'11" sqr tip, 114.6"/119" -7/0/24/40 flap, 60"x17" aileron
'84/89 M7 33'8" sqr tip, 126" -7/0/24/40/48 flap, 53"x17" aileron
'89/93 M7(A) 33'8" sqr tip, 126" -7/0/24/40/48 flap, 60"x17" aileron
'93 on all 32'11" sqr tip, 119" -7/0/24/40/(48) flap, 60"x17" aileron
all flap chords are 15"

someone correct me if you see a mistake

a64pilot · Post by **a64pilot** » Sat Jul 12, 2008 6:16 am

Jeremy,
I think there is a factory conversion from 5 to 6. What's involved, and is there more than one way to get there?

mountainflyer · Post by **mountainflyer** » Sat Jul 12, 2008 8:50 am

What was the advantage of the drooped tip. Would it be worth changing the square tip to drooped on an 86 MX7.

a64pilot · Post by **a64pilot** » Sat Jul 12, 2008 10:43 am

mountainflyer wrote:What was the advantage of the drooped tip. Would it be worth changing the square tip to drooped on an 86 MX7.

You can't because that's not IAW the type certificate, I don't think. I don't think it would fit anyway, but there should be a little better lift while in ground effect. In other words you should be able to land a little slower and T/O a little slower. Probably not much real difference in reality. I think there may be a little less drag in cruise also, again not much.
My theory is the droop tip was abandoned because with the square tip you can fit a longer aileron without increasing the wing length. Increase the wing length and I believe you may have to recertify at least the wings static strength and that at least means time and money.
I think the new tip isn't really a square tip, I think it's actually a hoerner tip.
Some reading here http://selair.selkirk.bc.ca/aerodynamic ... Page8.html

maules.com · Post by **maules.com** » Sat Jul 12, 2008 1:01 pm

You can modify an M5 to M6 by changeing wings to 32'11", or 33'8", which also will require the longer chord rudder. There is some airframe welding to do. Flap mechanism is totally different on later planes after M4 and M5. You can also change the M5 to early MX7 with 30'10" wing without rudder change I think.

a64pilot · Post by **a64pilot** » Sat Jul 12, 2008 5:02 pm

There was a 33"8" M6? Stupid me, I had forgotten about the TT flaps.

maules.com · Post by **maules.com** » Sun Jul 13, 2008 8:32 pm

To clarify,
there was'nt a 33'8" M6, however when you modify an M5 airframe to take the different flap mechanism, it becomes an M6 airframe, and this gets further modification with both the longer wings.

M5 vs M7 wing performance

M5 vs M7 wing performance

M5 vs. M7 wings

Re: M5 vs M7 wing performance

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