User Tag List
Results 1 to 15 of 63
Thread: Top Heavy Tunnel Hull ? -Video-
-
06-30-2019, 10:22 AM #1
Top Heavy Tunnel Hull ? -Video-
How fast? I don’t know haha. I can’t hold my phone gps at the same time as holding the wheel when she’s about to barrel roll haha. But going slower, When it’s showing 35mph on the vesselview via the paddle wheel input, my gps shows 40mph. So it’s def reading at least 5mph slow.
So at 60mph indicated on the vessel view, (maybe 65 tru mph?) She starts to porpoise. If I try to drive through the porpoise, trim up or neutral, she starts to jump out of the water! Then prop walks and gets almost into a barrel roll haha.
I learned about tunnel skirts on this website- wondering if that would help.
Move already relocated the battery to the front, I think the next is also moving the gas tank forward.
I have a through-hub 23 cleaver on it right now. I’ve got a 24 over-hub cleaver coming in the mail from a s&f member to try next.
Prop shaft currently is about 2” above the pads. It hopped worse with the motor lower.
Taking recommendations for what to try next.
1) 1995 14' Bayliner Restoration <--Click
2) Home-Made Tunnel-Boat Project <--Click
-
06-30-2019, 10:29 AM #2The Historic Photo Master
- Join Date
- Jan 2004
- Location
- Florida
- Posts
- 37,827
- Thanks (Given)
- 64
- Thanks (Received)
- 1667
- Likes (Given)
- 337
- Likes (Received)
- 19201
- Mentioned
- 3 Post(s)
- Tagged
- 0 Thread(s)
just need a hull stretcher. that's all.
-
06-30-2019, 10:30 AM #3The Historic Photo Master
- Join Date
- Jan 2004
- Location
- Florida
- Posts
- 37,827
- Thanks (Given)
- 64
- Thanks (Received)
- 1667
- Likes (Given)
- 337
- Likes (Received)
- 19201
- Mentioned
- 3 Post(s)
- Tagged
- 0 Thread(s)
please install and USE an ignition kill switch, if you haven't already.
-
FMP liked this post
-
06-30-2019, 11:29 AM #41) 1995 14' Bayliner Restoration <--Click
2) Home-Made Tunnel-Boat Project <--Click
-
06-30-2019, 11:33 AM #5Screaming And Flying!
- Join Date
- Feb 2015
- Location
- Ontario
- Posts
- 8,091
- Thanks (Given)
- 205
- Thanks (Received)
- 321
- Likes (Given)
- 1921
- Likes (Received)
- 2005
- Mentioned
- 2 Post(s)
- Tagged
- 0 Thread(s)
Ha! , short trees
-
06-30-2019, 01:17 PM #6
There’s a number of things that can cause porpoising, and as many ways to try to minimize the effects. Here’s an article that might help...
https://www.screamandfly.com/content.php?325-Porpoising-Why-It-Happens-and-How-To-Fix-It
more info here: https://aeromarineresearch.com/tbdp6/porpoise.html
/jimLast edited by Jimboat; 06-30-2019 at 03:21 PM.
-
David - WI liked this post
-
06-30-2019, 01:50 PM #7
Cut about 5" out of the midsection.
-
FMP liked this post
-
06-30-2019, 02:14 PM #8Screaming And Flying!
- Join Date
- Mar 2008
- Location
- Tourist Trap, Florida
- Posts
- 14,700
- Thanks (Given)
- 380
- Thanks (Received)
- 1280
- Likes (Given)
- 5599
- Likes (Received)
- 10931
- Mentioned
- 2 Post(s)
- Tagged
- 1 Thread(s)
Tunnel needs more compression. Bow is flying hi, tunnel hulls need to run flat.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
-
06-30-2019, 03:39 PM #9
Tunnel hull hop.
What type of prop are you running on this rig. I have had many old school type tunnels hulls in my life and think I know a thing or three about how they perform. Please provide a picture of your prop from the rear and I will bet that I can help you with this problem or give me a call at 541 570 0955 out here in Oregon.
Best wishes, Carter Powell
-
XstreamVking liked this post
-
06-30-2019, 04:02 PM #10
-
home made tunnel liked this post
-
06-30-2019, 05:30 PM #11Screaming And Flying!
- Join Date
- Feb 2015
- Location
- Ontario
- Posts
- 8,091
- Thanks (Given)
- 205
- Thanks (Received)
- 321
- Likes (Given)
- 1921
- Likes (Received)
- 2005
- Mentioned
- 2 Post(s)
- Tagged
- 0 Thread(s)
-
06-30-2019, 07:45 PM #12
I assume you are using a hull pickup with a stock lower?
Azure AZ259, 8.1
-
06-30-2019, 10:00 PM #13
I think we (no offense OP, been there young, I'm 69 now)) but .."this should work!" is a learning lesson simple! There ARE limits but "he's wrong, young and simple young says .."! Oh really?
Still in force today! (And may the 4TH be with you
Newton's three laws of motion may be stated as follows: Every object in a state of uniform motion will remain in that state of motion unless an external force acts on it. Force equals mass times acceleration [ ]. For every action there is an equal and opposite reaction.Last edited by Robby321; 06-30-2019 at 10:04 PM.
-
07-03-2019, 11:38 PM #141) 1995 14' Bayliner Restoration <--Click
2) Home-Made Tunnel-Boat Project <--Click
-
07-04-2019, 06:18 AM #15
I'd try a few 10lb sandbags at the front
ARGO Cat 18'
Mercury 2.4EFI/CLE
------------------------------------
If it's not a cat it's a.............dog ?
Similar Threads
-
Video running in the Gulf. 13" tunnel hull
By Mr. Demeanor in forum General Boating DiscussionReplies: 8Last Post: 10-19-2011, 01:09 AM -
New Tunnel design Spire Tunnel hull 126+ with twins
By whipper in forum General Boating DiscussionReplies: 0Last Post: 10-10-2011, 04:01 PM -
THE tunnel hull video
By Mark75H in forum Outboard and Racing HistoryReplies: 8Last Post: 03-08-2010, 01:11 PM -
Prop advice...300x on a heavy hull
By 86 apache 22 in forum Technical DiscussionReplies: 3Last Post: 05-22-2007, 12:36 PM -
seting up a small but "heavy" tunnel hull
By 150aintenuff in forum Props, Setup, and RiggingReplies: 14Last Post: 05-04-2005, 05:13 PM