Toki
Well-known member
- Joined
- Apr 21, 2019
- Messages
- 222
- Fluid Motion Model
- C-28
- Non-Fluid Motion Model
- Tartan 30, Columbia 26
- Vessel Name
- Toki
I'm still figuring out my R27 classic. I'm a blowboater, and the idea of speeds above 8 kn and "getting on plane" are still alien to me. I've been reading through several posts here on trim tabs and also chatting with a couple others on the subject. I'm a little confused and am hoping to receive some guidance.
My understanding is a primary purpose of trim tabs is to get the boat on plane. Without the tabs, as speed increases the bow goes up and the stern carves a trench in the water, trim tabs enable you to quickly bring the bow down and plane level. So far so good???
OK, so now I'm cruising at 14 kn, boat is level, and planing (as much as an R27 with inboard can plane), but my tabs are full down. Isn't that inefficient? Aren't I burning diesel to churn water at that point?
I think I've read that once the boat is on plane and level, I should be able to retract the tabs and it stays level. Does that sound right? Doesn't work that way with my R27. I retract the tabs and the bow goes back up (not a lot, but up). Is this right?
I also understand using the tabs to level the boat out side to side if it's unevenly loaded, I have no confusion here, works well. I also understand that outboard boats involve a different equation as motor trim and trim tabs can be worked in concert, whereas I'm trim tabs only.
So .... Educate me!
Thanks
My understanding is a primary purpose of trim tabs is to get the boat on plane. Without the tabs, as speed increases the bow goes up and the stern carves a trench in the water, trim tabs enable you to quickly bring the bow down and plane level. So far so good???
OK, so now I'm cruising at 14 kn, boat is level, and planing (as much as an R27 with inboard can plane), but my tabs are full down. Isn't that inefficient? Aren't I burning diesel to churn water at that point?
I think I've read that once the boat is on plane and level, I should be able to retract the tabs and it stays level. Does that sound right? Doesn't work that way with my R27. I retract the tabs and the bow goes back up (not a lot, but up). Is this right?
I also understand using the tabs to level the boat out side to side if it's unevenly loaded, I have no confusion here, works well. I also understand that outboard boats involve a different equation as motor trim and trim tabs can be worked in concert, whereas I'm trim tabs only.
So .... Educate me!
Thanks