ISonic 117 (2011) Fin question for Remi - Page 2

cholo · 19th October 2010, 03:52 AM

Hi Pfaffi,

you fins look interesting (and good!).

What's the reason for the tip shape?

Cheers
Cholo

pfaffi · 4th November 2010, 03:18 PM

Hi Cholo!

Fins are designed to maximize lift by a minimum of drag. Out of this is the special Tip shape. Additional to reduce the twist by outline design and not only by twist reinforcement. The used laminar profile is one of the fastest and non critical. Find some lift/drag diagram and profile views on my starting page.

http://www.pfaffi.at/pfaffi_fins/Home.html

Cheers pfaffi

Lasher · 4th November 2010, 09:09 PM

Tested 117 w from 18 kts to 30 kts.I found out the following set ups were excellent:

18-23 kts. low chop 0.2 m -severne code red 8.3-deboichet silver select 44 cm deep tuttle
25-30 kts.moderate chop 0.5m-severne code red 7.0-maui techtonics 40 cm tuttle

I am 84 kg.Surprisingly the board did not feel big or heavy or uncontrollable at 30 kts.On the contrary it felt even better than IS 101.Strange...

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Question for Remi: isonic 117 or 117wide?	Marko	Ask Our Team	3	7th September 2010 09:44 PM
question for Remi: iSonic 131 shape similar to 144?	marekk	Ask Our Team	1	17th April 2010 06:57 PM
Question for Remi, iSonic 131 footstraps?	nonopr	Ask Our Team	2	20th October 2009 10:10 PM
Question pour Remi: Isonic 101 & 122, quels ailerons?	Terminator	French Forum	23	21st April 2009 11:41 PM
Question to Ian and Remi on iSonic 145/155	paulk	Ask Our Team	11	2nd September 2006 09:45 AM

19th October 2010, 03:52 AM	#11
cholo Member Join Date: Aug 2006 Posts: 33	Hi Pfaffi, you fins look interesting (and good!). What's the reason for the tip shape? Cheers Cholo

4th November 2010, 03:18 PM	#12
pfaffi Member Join Date: Jan 1970 Location: Austria - Lake Neusiedler, closed Vienna Posts: 136	Hi Cholo! Fins are designed to maximize lift by a minimum of drag. Out of this is the special Tip shape. Additional to reduce the twist by outline design and not only by twist reinforcement. The used laminar profile is one of the fastest and non critical. Find some lift/drag diagram and profile views on my starting page. http://www.pfaffi.at/pfaffi_fins/Home.html Cheers pfaffi

4th November 2010, 09:09 PM	#13
Lasher New Member Join Date: Oct 2009 Posts: 7	Tested 117 w from 18 kts to 30 kts.I found out the following set ups were excellent: 18-23 kts. low chop 0.2 m -severne code red 8.3-deboichet silver select 44 cm deep tuttle 25-30 kts.moderate chop 0.5m-severne code red 7.0-maui techtonics 40 cm tuttle I am 84 kg.Surprisingly the board did not feel big or heavy or uncontrollable at 30 kts.On the contrary it felt even better than IS 101.Strange...