AT 25 Question
 

2nd year on my check 251 and brain storming about moving to something that doesn't porpoise or list to one side so bad. My understanding is the AT 25 has about the same beam, so how does it do as far as leaning to either side when below 40mph? Does it have a bottom pad? Any porpoise? I'd be looking at older models since my budget will be under 40K. Thanks.

Depends. How much do you weigh?

no pad here

http://i295.photobucket.com/albums/m...tsyouthere.jpg

I would imagine that any single engine mid 20 foot boat will have balance issues. I keep mine level by adjusting the tabs, it's different every time I go out depending on the load.

Getting personal huh?? Kidding I'm about 210.

No pad, imagine with 800 hp and a good prop it might lean a bit lol

I think ajexpress is referring to the prop torque and the boat listing to the port side when at cruising speeds. My boat is a 24/7 hull with a small pad. The list to port is horrible at cruise speed and only evens out near top end speeds or I have to drag the port tab to correct. I don't have any porpoise problems.

So does the 25 AT have that problem?

This... I drop one tab a bit lower and it will be nice an level. Even if I don't, it doesn't lean horribly... Barely noticeable.

I have a 2-owner 1995 on a Manning trailer that I would let go for $30k

Thanks, yes. Always seems my 251 is trying to get up on the pad until I get to 45-50. In chop it will list from one side to the other till it's on the pad.

Increase your budget a little and you could buy my 32 AT.

So yours will list to starboard also? Mine only lists to port from the prop torque. Mine has a small pad, how big is the pad on your 251?

Decrease your asking price a little and we could talk.:lolhit:

Spinning a lefty 23 mirage that i picked cheap last year after trashin my 25 hydro. It wants to lean starboard at lower speeds...never noticed it with the right handed hydro..lookin for a 25 right handed mirage next .23 is under proped for me best speed so far is 64.2 @5000 trimmed to the moon, with alot of throttle left.

Nah, being a smart azz. Running though on any single you get a little prop torque. The 25 is a straight 24 degree V.

my 28 lists a little to the port spinning a 5 blade at cruise speed

aj, clear your inbox..... Tried to send you pics of my Tantrum...

Is it listing or is it chine walking?

I'm gonna say the pad is roughly 18". Its listing not chine walk. I get no chine walk at all. at speeds over 50mph she's a dream, it's under 45 in non calm water that's kinda annoying. I get a list probably due to prop torque, adjust with tab and on calm water it's fine, but in chop and 35-45 it'll kinda flop from side to side dependent on the water. I understand there will be some prop torque but I'm trying to get a better understanding of its stability after you adjust for the prop torque with the tab, and speeds under 45ish. I'm wondering if it rides better at those speeds due to a lack of pad? I'm trying to explain this the best I can, but still not sure I'm doing a good job.

If it is going from side to side......it may be falling off the pad. Try trimming up to get the bow up and settle more on the pad.

My Checkmate 2800SX will only lean to one side when caught in the slope of a wake while passing another boat or running into a headwind off either side of the bow...a quick touch on the tab and the boat levels out nicely! She does run on a "v" pad bottom...

A friend of mine had one on my lake about 10 years ago, was crazy fast with a 500 blower motor. Much better built boat than your Baja the build quality and ride will be the biggest
difference!

I think we worked through the answer to my question. Since the 251 has a pad at low speeds (<45) it has a tendency to fall off the pad since the boat is in between being on the pad & not on the pad. This is what causes the boat to list to either side. This is all solved by running 45+, but I'm one of the only guys who can run over 50mph in my boating group (sad I know....need to get to know more performance boat guys). Anyway, it'd be nice to be able to run under 45 without having the boat flop around due to falling off the pad at lower speeds. Since the AT 25 doesn't have a pad I'm going to assume it doesn't have this issue. (correct me if I'm wrong).

The 25 AT is a great boat all around.

My boat never has a period so no pad is ever needed...although it occasionly needs a good douche

Thanks, but more interested in a boat '98 and newer when, to my knowledge, they stopped using wood.

I have 00' AT 25 Tantrum. No pad here, 24 V all the way through. Great rough water boat and just overall fun driving boat. Does any one know of any other 00' or newer Tantrums out there?

John

AJ clear your inbox

Cleared

AJ clear your inbox

Balance Danialson. Balance
It's all in how you run your boat the most and what you want it to do

I had a '96 Tantrum and a friend had a '89 251. I didn't think the 251 had a pad. The 251 was very reactive to anyone moving around in the boat. He was constantly adjusting the tabs to keep it level at slower speeds. I believe the 251 was a little narrower than the AT. The AT was very stable compared to the 251, but I thought the 251 cut the water better(LOTO).

So...... what's the question?

Lots of things cause a boat to list at different speeds...
What prop? pitch? style? direction?
How is the boat trimmed at the speed you're asking about?
What side is the battery on?
What is normal cruise load?
All of these have some degree of effect,

I have a super clean 98 with 500hp procharged FS

I noticed listing occasionally at lower speeds. With the right trim and tab it evens out. I wonder if I could change props to get a bit more mid level performance.

A single engine boat will almost always list at some speed(s); especially when it's a true V-bottom and no pronounced pad.