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 Post subject: 88-1650
PostPosted: Sun Sep 04, 2016 06:23 
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Joined: Fri Mar 02, 2007 10:07
Posts: 25
Location: quesnel b.c. ca.
I have a 7DC with Don's Dream machine conversion. I had it on 1320's it was way under floated but they got of the water very well, however the back hatches were under water most of the time and it felt like it wanted to take a dive on a turn, so I sold them. 1400 1500 are all approved one way or another. Do any of you know about 1650 and how they would work, they look good on that 7FC or maybe it was EC I saw on the internet?

Robert


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 Post subject: Re: 88-1650
PostPosted: Sun Sep 04, 2016 07:34 
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Joined: Mon Sep 13, 2010 10:48
Posts: 801
I have had 1320s under the Bruce Dunham STC for 1320s on 7CCMs (C-90-8 with no accessory case or starter and everything taken out to make it lighter. Great performing seaplane even with 2 200 pounders on board. Then had 1400s on my Chief also with Don's Dream Machine Engine and I would not try any larger, heavier floats than those. The 1400s worked fine although their design is not as efficient as the 1320s.

I also tried 1400s on a 7CCM and with two on board, it was not easy to get on the step within a reasonable distance unless you had a good headwind. Too much rear CG, which was not a problem in the Chief as even a couple of fat guys were still over the center of gravity in the side by side arrangement.

Many 7EC guys that I have talked to have had the same problem with 1400s due to the weight with the starter etc. I think 1650s would be worse.

After all of that, I believe the Type Certificate only allows the 1400s on a 7DC, there is an STC for the OK1500s on the 7DC, but other than the Dunham STC, I at least don't know of any others, but J.J. Frey I bet would.

Bob

_________________
Robert P. Kittine, Jr.WA2YDV
West Nyack Aviation, L.L.C.
New York, New York 631-374-9652
rkittine@aol.com


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