Sunday, January 24, 2010
Sunday, January 17, 2010
Flush Mount Through Hulls
Akoni is out of the water for the year and one of the projects I had lined up was to install a new ST-40 system from Raymarine for speed and depth. The old depth unit was barely working, so it's time for a new one. After looking at the bottom of a couple of the other racers in the yard, I decided that flush mounting the transducers and fairing them in would make sense. We had a warm weekend so I decided to get started and drill some holes. The job was easier than I thought, so I got pretty far.
Here is akoni after the haul out:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgf3f4O8dAxCgj6LNskJpbps67gfQm3KTOyGte8MaEsRrPvHmInAATC9skaMs5r2q-9s6XX4TEK1eOiZJ_KDLOnzCX6MbYNgA5szoGo5puarjOQCTyPKBjTVpcD0gZpqZQcaJtftm68oMQ/s320/12-5-09+014sm.jpg)
Here are interior and exterior shots after I removed the old transducer and cleaned out the existing 2" hole. I traced a circle around the new transducer flange so I knew what to remove in the next step:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXHll25vm3gQvpq7i8My6zdL3LLMMbUtktO2Xx3kK4-39JPmVph0ZzPHd2LX5rgKJoO2XTeP6l6toGQfwmJONHm7O5jI9QsD0EEgD_OYevlOhZXymQfAEDNbdR6go8fOZEl5AiT7H1I4g/s320/Akoni+Through+Hull+hole+inside+2sm.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTxrZEisklpTaAYtsSte4gYf2i4ybUxjCTOoLbS8ls5U5XyPXj49Aq6nYPwbf1DzHhNQC-dxi4ycD7ENfkDVYA9zq2A7yPJIVbgIhrTcL5NEvaTkMqPgbh9DTLdmJ1OJoekrtJxfkjsy8/s320/Akoni+Through+Hull+004sm.jpg)
What I did to recess the transducer was to use a router set at the thickness of the flange to remove the hull material around the hole up to the circle I traced. I also added a second hole for the other transducer:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLyrE_VScW_AC_7O2CtiL0kXORBqexiVGhVDUl2SdhPrC3NB57eILaVE102mqOwnHZXhp5o27yJbbQBKoFWiBv_SfZ-G_veOKW4lXy5MeAPC_MeydTfkWMOJlNhHQRFrGpL_blSeTWuGs/s320/Akoni+throughhull+countersink3+sm.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPsXJP2ZCNra_0wAeL68LR9BL6IhDUyOhnBDWd6882GAhyphenhyphenb4qDXqbewbJbjpm4GFOplEdpEXJfeXMW_jziSIn6-CsXCC5ZA_aaU262rND-yOc7Nfjq6wrQ-_GMuixn9TXHyUN3gc3t-F8/s320/Akoni+2nd+Through+Hull+001sm.jpg)
I mounted the depth transducer ahead of the speed paddlewheel to prevent turbulance from potentially interfering with the depth sounder. I ran out of time and needed to let the 3M 4200 sealant dry before fairing everything over. I do that next week if the weather is good:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNIZHTsWSSdpxy2xLt0SFr37lIRipYDV8UiuL_oWGMYuUPL4KkkaEq0tcsv7Asp2aDk-x0NO-Ob49cowWtj-Z_Cc43zgHjRRJgYMV7fg4RzKJS9CaKbA87vhhohhQhIf8ebmlqSXmT6pg/s320/Akoni+Through+Hull+flush+006sm.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEir6AwI5fnDYGP24GPnLJd3zYjAdiDsrxpQHUlS6jO-K2DKv35J_wPfOHHv_0krCsYnUCidGYd2-mMUjx7g_Df5YEiX7r5vMpWahJPdYkNmWZAN0S5r0xnvmtWWQ291FOPLjuLGuklbDis/s320/Akoni+Through+Hull+flush+008sm.jpg)
Here is akoni after the haul out:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgf3f4O8dAxCgj6LNskJpbps67gfQm3KTOyGte8MaEsRrPvHmInAATC9skaMs5r2q-9s6XX4TEK1eOiZJ_KDLOnzCX6MbYNgA5szoGo5puarjOQCTyPKBjTVpcD0gZpqZQcaJtftm68oMQ/s320/12-5-09+014sm.jpg)
Here are interior and exterior shots after I removed the old transducer and cleaned out the existing 2" hole. I traced a circle around the new transducer flange so I knew what to remove in the next step:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgXHll25vm3gQvpq7i8My6zdL3LLMMbUtktO2Xx3kK4-39JPmVph0ZzPHd2LX5rgKJoO2XTeP6l6toGQfwmJONHm7O5jI9QsD0EEgD_OYevlOhZXymQfAEDNbdR6go8fOZEl5AiT7H1I4g/s320/Akoni+Through+Hull+hole+inside+2sm.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTxrZEisklpTaAYtsSte4gYf2i4ybUxjCTOoLbS8ls5U5XyPXj49Aq6nYPwbf1DzHhNQC-dxi4ycD7ENfkDVYA9zq2A7yPJIVbgIhrTcL5NEvaTkMqPgbh9DTLdmJ1OJoekrtJxfkjsy8/s320/Akoni+Through+Hull+004sm.jpg)
What I did to recess the transducer was to use a router set at the thickness of the flange to remove the hull material around the hole up to the circle I traced. I also added a second hole for the other transducer:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLyrE_VScW_AC_7O2CtiL0kXORBqexiVGhVDUl2SdhPrC3NB57eILaVE102mqOwnHZXhp5o27yJbbQBKoFWiBv_SfZ-G_veOKW4lXy5MeAPC_MeydTfkWMOJlNhHQRFrGpL_blSeTWuGs/s320/Akoni+throughhull+countersink3+sm.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPsXJP2ZCNra_0wAeL68LR9BL6IhDUyOhnBDWd6882GAhyphenhyphenb4qDXqbewbJbjpm4GFOplEdpEXJfeXMW_jziSIn6-CsXCC5ZA_aaU262rND-yOc7Nfjq6wrQ-_GMuixn9TXHyUN3gc3t-F8/s320/Akoni+2nd+Through+Hull+001sm.jpg)
I mounted the depth transducer ahead of the speed paddlewheel to prevent turbulance from potentially interfering with the depth sounder. I ran out of time and needed to let the 3M 4200 sealant dry before fairing everything over. I do that next week if the weather is good:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNIZHTsWSSdpxy2xLt0SFr37lIRipYDV8UiuL_oWGMYuUPL4KkkaEq0tcsv7Asp2aDk-x0NO-Ob49cowWtj-Z_Cc43zgHjRRJgYMV7fg4RzKJS9CaKbA87vhhohhQhIf8ebmlqSXmT6pg/s320/Akoni+Through+Hull+flush+006sm.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEir6AwI5fnDYGP24GPnLJd3zYjAdiDsrxpQHUlS6jO-K2DKv35J_wPfOHHv_0krCsYnUCidGYd2-mMUjx7g_Df5YEiX7r5vMpWahJPdYkNmWZAN0S5r0xnvmtWWQ291FOPLjuLGuklbDis/s320/Akoni+Through+Hull+flush+008sm.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAlNVmfG5WI2kURemitfsYgc_xP8Kcba79YJYxXEQiC6QjJCP9cfAszaXmIP6I8C2NfheM62hEBh6OsgaXc28Fj15FOLc5NRO6mLb38qNrCG4Jr6-WrVLlKIMYzcQwJ_pvXXUP0wyVm9c/s320/Akoni+Through+Hull+mount+inside+10sm.jpg)
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