M7B-235 aqua2400 speeds

aviator2 · Post by **aviator2** » Mon May 02, 2016 6:27 am

I am putting my m7b235 on floats this spring and was wondering what to expect for speed loss? also weight difference from oleo gear with 850s

Mark - AK · Post by **Mark - AK** » Mon May 02, 2016 7:20 am

You should get a 250 pound weight increase to 2750 GW with these floats...check your paperwork. As far as speed, it depends on how much fuel you are willing to burn. I usually cruise around 105 kts at around 14 GPH, but I am almost always heavy. If this is the first time on floats for the plane you may have to spend a little time adjusting the rigging since the water rudders act like trim tabs until you get them just right. I think you will really enjoy the M-7 on these floats...let us all know and best of luck to you!

aviator2 · Post by **aviator2** » Mon May 02, 2016 7:40 am

Thanks for the reply. Do you know what the gear weighs we haven't had it off yet to weigh it yet? I do have the heavy struts so I do get the increase.

Duane · Post by **Duane** » Mon May 02, 2016 11:15 am

According to the Flight Manual Supplement, your gross will be 2750 with the Aqua 2400's.

UP-M5 · Post by **UP-M5** » Tue May 03, 2016 1:41 pm

Duane wrote:According to the Flight Manual Supplement, your gross will be 2750 with the Aqua 2400's.

this is true as long as you have the later model heavy duty struts from aqua. old struts from the late '70's were oval shaped (cross section) and i was told they are not intended for the 2750 GW. the newer style struts are identifiable by there streamlined (airfoil) shaped cross section.

i also cruise around 105 kts at about 22 squared burning between 12.5 and 14 gph.

my useful load is almost exactly the same (900lbs) between aqua 2400's and 31" bushwheels. so you will likely gain some usefull.

aviator2 · Post by **aviator2** » Tue May 03, 2016 2:06 pm

I have the 3 blade McCauley prop is that going to be ok for floats?

MrHRC · Post by **MrHRC** » Tue May 03, 2016 9:34 pm

3 blade works great for me. 100kts 23 squared 11 gph IO540 - Baumann 2750 Amphibs. I only have 650 lbs useful.

TomD · Post by **TomD** » Wed May 04, 2016 5:39 am

My M5-235C has a McCauley 3 Blade on 2400's and it is a great combination.

The extra wing on the M7 will be even better.

Maulepilotm6 · Post by **Maulepilotm6** » Tue May 10, 2016 9:59 pm

I get 115kts with my M6-235 on my 2400's at 24 squared 13gph also 3 bladed McCauley

Once you have installed your floats remember to post your numbers

TomD · Post by **TomD** » Wed May 11, 2016 8:15 am

I remember I got about 100 mph at about 20" 2200, burn depended on altitude.

maulecan · Post by **maulecan** » Tue Apr 10, 2018 1:33 pm

Get 110kts on Edo 2440B at 22"man and 22 rpm with m7235 long wing and io 540

M7B-235 aqua2400 speeds

M7B-235 aqua2400 speeds

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