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  #11  
Old 09-06-2011, 09:59 AM
jfogarty jfogarty is offline
 
Join Date: Sep 2005
Posts: 107
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Did they make the float struts in Alaska and do you have all the measurements?
There is a set of Baumann 2100 straight floats for sale on Barnstormers right now, if anyone is up to putting another RV-9F on floats. What a great thread. Thanks for sharing the information.

Jim Fogarty
RV9a building MN
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  #12  
Old 09-07-2011, 09:16 AM
MauiLvrs's Avatar
MauiLvrs MauiLvrs is offline
 
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Location: KTCY
Posts: 642
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Pictures???
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  #13  
Old 09-07-2011, 11:24 AM
questair questair is offline
 
Join Date: Jul 2007
Location: alaska
Posts: 37
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Quote:
Originally Posted by jfogarty View Post
Did they make the float struts in Alaska and do you have all the measurements?
There is a set of Baumann 2100 straight floats for sale on Barnstormers right now, if anyone is up to putting another RV-9F on floats. What a great thread. Thanks for sharing the information.

Jim Fogarty
RV9a building MN
I know of no other 9 being put on floats. I can say that it does better than I expected. it gets off the water almost as short as a 180 super cub and then out climbs and cruises faster than any float plane that i am aware of. The installation turned out to be complex. The rear float fittings on the fuselage attached to the rear spar attachments after being drilled to 3/8" These were made available by synergy Air and I believe the last ones made. They could no doubt be duplicated but might be costly. They were originally designed for Trey's 7 but would not work with a conventional strut block attach fitting at the end of the float strut because the flap hangars on the 9's flaps interfered with the blocks. So we used a big wing strut fork and screwed it into the top of the float strut and instead of having a full size strut for the last 5 inches we had a 3/4" wing strut fork attached to the fuselage fitting which did not interfere with the flap hangar which now could be adjusted to provide the proper throat opening for the floats. It was not too difficult to fabricate the front fittings using the socket where the main landing gear attached. Simple float struts can be cut to size and modified easily to work. We actually used a discarded piper wing strut for the diagonal float strut. It is steel and considerably stronger than regular aluminum If someone gets real serious they are welcome to visit and I can show them exactly how we did it. The Baumanns seem like a good fit. They are light and provide more than ample floatation. Net weight gain was only 160# with the plane on floats now weighing 1250 approx. I had to experiment with different locations for the floats location under the fuselage and throat openings, but think I have it about right now. So far it has not shown any bad habits. I thought that i might need a dorsal fin but it does not seem to have a yaw issue which can be the case when the mass of the floats forward of the CG exceed the straightening ability of the vertical fin. It is hard to load it in a manner that puts it outside the CG limits. Of course it has some limitations that all low wing float planes have: it is hard to see exactly where the water is directly under you during short field landings; there will be no docking the plane, rain gets in the plane when the canopy is slid back; one must step off the front of the wing sometimes when beaching ( not a big deal with a step on the forward float strut); loading the plane takes more effort, especially if you want to load a dog by yourself; I can not get from the front to the back on the floats even by crawling. It is much easier to fuel and considerably less dangerous than climbing up to the wing on a high wing; it is easy to handle on the water when moving by hand; and it has definite performance advantages. The larger tail surfaces give it considerably more elevator authority ( very important on landing and takeoff); the flaps and larger wing get it out of the water much quicker than would be the case with the other RV's, and the 180HP gets it on the step right now even with the 72" BA constant speed propeller. I will be putting an 82" MT two blade on next season. Much of the fun, of course, is the attention that it gets.
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  #14  
Old 12-15-2017, 08:14 AM
Vlad's Avatar
Vlad Vlad is offline
 
Join Date: Oct 2008
Location: NJ
Posts: 7,470
Default Questair

Quote:
Originally Posted by questair View Post
I know of no other 9 being put on floats. I can say that it does better than I expected. it gets off the water almost as short as a 180 super cub and then out climbs and cruises faster than any float plane that i am aware of. The installation turned out to be complex. The rear float fittings on the fuselage attached to the rear spar attachments after being drilled to 3/8" These were made available by synergy Air and I believe the last ones made. They could no doubt be duplicated but might be costly. They were originally designed for Trey's 7 but would not work with a conventional strut block attach fitting at the end of the float strut because the flap hangars on the 9's flaps interfered with the blocks. So we used a big wing strut fork and screwed it into the top of the float strut and instead of having a full size strut for the last 5 inches we had a 3/4" wing strut fork attached to the fuselage fitting which did not interfere with the flap hangar which now could be adjusted to provide the proper throat opening for the floats. It was not too difficult to fabricate the front fittings using the socket where the main landing gear attached. Simple float struts can be cut to size and modified easily to work. We actually used a discarded piper wing strut for the diagonal float strut. It is steel and considerably stronger than regular aluminum If someone gets real serious they are welcome to visit and I can show them exactly how we did it. The Baumanns seem like a good fit. They are light and provide more than ample floatation. Net weight gain was only 160# with the plane on floats now weighing 1250 approx. I had to experiment with different locations for the floats location under the fuselage and throat openings, but think I have it about right now. So far it has not shown any bad habits. I thought that i might need a dorsal fin but it does not seem to have a yaw issue which can be the case when the mass of the floats forward of the CG exceed the straightening ability of the vertical fin. It is hard to load it in a manner that puts it outside the CG limits. Of course it has some limitations that all low wing float planes have: it is hard to see exactly where the water is directly under you during short field landings; there will be no docking the plane, rain gets in the plane when the canopy is slid back; one must step off the front of the wing sometimes when beaching ( not a big deal with a step on the forward float strut); loading the plane takes more effort, especially if you want to load a dog by yourself; I can not get from the front to the back on the floats even by crawling. It is much easier to fuel and considerably less dangerous than climbing up to the wing on a high wing; it is easy to handle on the water when moving by hand; and it has definite performance advantages. The larger tail surfaces give it considerably more elevator authority ( very important on landing and takeoff); the flaps and larger wing get it out of the water much quicker than would be the case with the other RV's, and the 180HP gets it on the step right now even with the 72" BA constant speed propeller. I will be putting an 82" MT two blade on next season. Much of the fun, of course, is the attention that it gets.

Reviving old thread. I will be visiting Alaska in June 2018 and I am wondering if there still is an opportunity to take a look at the only RV9 on floats. Please PM or email via VAF.
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  #15  
Old 01-13-2018, 08:09 PM
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pilotgabe pilotgabe is offline
 
Join Date: Jan 2016
Location: Arcadia, CA KEMT
Posts: 21
Thumbs up Pics

Where's the pictures???
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  #16  
Old 01-13-2018, 10:13 PM
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roadrunner20 roadrunner20 is offline
 
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Location: Bay Pines, FL (based @ KCLW)
Posts: 1,849
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Quote:
Originally Posted by Joel Medeiros View Post
One picture is here in thread #9
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  #17  
Old 01-14-2018, 02:09 PM
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flightlogic flightlogic is offline
 
Join Date: Nov 2013
Location: Prescott, AZ
Posts: 1,479
Default adjusting

Now that really does get your attention. Lake Hood would be a hoot with that plane. I would have a hard time adjusting to no docking. My Beaver "career" in Alaska almost never included beaches. Just the opposite of this 9. But it sure would be fun to make the adjustments....
Thanks for posting the link to the photo.
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Work bio: Avionics tech support; ATP rated in planes.Helicopter rated, balloon instructor, seaplanes and for grins, Phantom Drone pilot. Instructor for air medical and law enforcement tactical radio systems. Fly my RV9A to work every week. Janitor when and as needed.
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  #18  
Old 01-14-2018, 03:09 PM
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flyboy1963 flyboy1963 is offline
 
Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,350
Default docking??? we don' need no steenkin' dock!

...well, seriously, I have never been a float pilot, but have ridden quite a few times.
Almost without exception, every dock we visited on the west coast had a gangway to a FLOAT, which was a foot or two at most above the water, so I'd wager that you could actually pull an RV-9f alongside most of the places that other floatplanes go!?
and.....
Here in the interior, you're talking a handful of boat fuel places on the larger lakes, all with floats to deal with the changing water levels throughout the season.

.....perhaps the real float pilots could comment?
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