Performance on Floats

[gcgilpin]

Re: Performance on Floats

Regarding the O200 with McCauley 7538... I agree that this is likely a great combination. However, they are impossible to find used and you're likely to pay about $2700 for a new one.

I ended up going with a McCauley 7440. Excellent prop and close to the performance of 7538.

If you watch for them you should be able to get one for about $1000 - $1500.

[Jim Doody]

Re: Performance on Floats

The McCauley IB90CF7538 is listed on the 0200 Cessna 150 type certificate as a seaplane prop, also on the 0200 F19 type cert. Legend Cubs are using that same prop on their light sport Cub clones. It is 75" long. I have flown that prop on a 0200 J3 and it is a baby Borer for a Continental. It is a GREAT prop for an 0200. Good luck finding a used one. Jim

[Dano"T"]

Re: Performance on Floats

I think weight is the biggest thing....if you put 2 big guys and some gas....the 1500's are better..I had trouble getting on the step with the old 1320's....now I have my Baumanns, lightweight, and the C90 and takeoff performance is amazing...guys at the seaplane base at Oshkosh were timing me at 8 and 10 seconds and it was 90 degrees out with little wind...I also cruise at 92mph. I have no electrics like Perry only a battery for my ICOM. My E.W. is 922 with the Baumanns on. I have a 76AK-2-40 prop. 1320's are the best design ever for these small, light planes...the Baumann's are almost an exact replica....same fluted bottoms...just an inch wider and 1 1/2" deeper...1400's usually don't perform as well as 1320's because of the flat bottoms in my opinion.

[perryv1]

Re: Performance on Floats

Any chance I could have a chat with you one on one regarding floats ?
I have a chance for a set of 1320's but I'm worried they could be too
underfloated for my over bloated T .

my email is [email protected]

Some say that the 1320s are underfloated, but IMHO they are perfectly fine if you know how to use them.Also needs to be noted that these are the only ones i have used under my airplane.however,as far as floatation is concerened, I have never had an issue with sinking, pushing,or sailing.the only thing I might do is to have 2 rudders. (better control in tight places).But the performance that I get with them is outstanding!I have a sensenich 74-42 prop,and an )-200 conversion with No electrical (except a small battery for my hand held) and It gives me under 15 second takeoff times and a +90 mph cruse, thats not bad .I have observed T-s with 1400 under them but have noticed a lot less performance and slower cruse.
PV

[d.grimm]

Re: Performance on Floats

How about those "Water Wings" from Crosswinds STOL. Lots of excitement at
www.supercub.org about them.

[Robert Bradbury]

Re: Performance on Floats

I went from an C85 to a C90. Very noticeable difference. I'd expect you to see a similar difference with the C85 / O200 setup.

I'm going to go one step furthur this winter and bump my C90 up to 120hp without a weight penality.

This involves c85 pistons, new cylinders, porting polishing, flow matching the entire induction system and a new cam . Can't do this though unless you are experimental .

[gcgilpin]

Re: Performance on Floats

FLYKENKEN,
Thanks for the input. Sounds like personal mission objectives still dictate which float is best.

When you performed your C85-O200 Crank Mod, would you say there was there a dramatic night and day difference in performance, or was it only slightly noticeable?

Thanks.

I went from an C85 to a C90. Very noticeable difference. I'd expect you to see a similar difference with the C85 / O200 setup.

[Robert Bradbury]

Re: Performance on Floats

Last year at Greenville I was Clocked at 12 Seconds! beat out another 100 t_Craft and 2 Super Cubs and a PA12 in the next class
That was FUN!!!!!!!!
PV

Any chance I could have a chat with you one on one regarding floats ?
I have a chance for a set of 1320's but I'm worried they could be too
underfloated for my over bloated T .

my email is [email protected]

[Dano"T"]

Re: Performance on Floats

The C90 was approved by buying the Harer STC, performing all mods except substitute a C-90 for C-85 and file a 337. You are allowwed up to 10% HP increase at the field approval level...Just got back from Oshkosh....had a great time. Oh....the 76AK-2-40 prop actually measures just over 74.25" on the tape.

[d.a.]

Re: Performance on Floats

Great info, thanks.

[flykenken]

Re: Performance on Floats

Oh, I should add that the T/O above was against a 4 kt current too. When you add current to the wind it makes the water a bit rougher. After T/O we climbed to and maintained 4500asl cyl head temps normal oil temp 190 OAT 50 at altitude. Because of the slower cruise on floats your oil temps are often 20-40 degrees higher than on wheels.

[flykenken]

Re: Performance on Floats

Just did a 2 person t/o 2100 asl alt 29.88 temp 60, 1370 lbs, 7-8 kt wind in 25 seconds. So you see how important a bit of wind is

[Larry Lyons]

Re: Performance on Floats

FLYKENKEN,
Thanks for the input. Sounds like personal mission objectives still dictate which float is best.

When you performed your C85-O200 Crank Mod, would you say there was there a dramatic night and day difference in performance, or was it only slightly noticeable?

Thanks.

I missed the Forum at Airventure where they were going to talk about all this stuff, but did hear 2 testimonials that stated that this combo gives markedly better performance. They Estimated the HP to be 95 or better.
Larry

[flykenken]

Re: Performance on Floats

I picked up 200 static rpm and it made a huge difference in performance. Also threw out the stromberg carb - after first beating it with a hammer - and put a precision carb on. The precision carb is way better in winter.

[d.a.]

Re: Performance on Floats

FLYKENKEN,
Thanks for the input. Sounds like personal mission objectives still dictate which float is best.

When you performed your C85-O200 Crank Mod, would you say there was there a dramatic night and day difference in performance, or was it only slightly noticeable?

Thanks.