is there substitute to core

**blackbullet40** · 10-17-2016, 10:24 PM

im about to buy a hydrostream viper it needs a full recore, can you rip out all the old stuff put new stringers but instead of putting core back in just stringers and layers of fiberglass. if not can someone please show me the way on how to do a recore

**Scream And Fly** · 10-18-2016, 06:13 AM

Hi Blackbullet,

Yes, you can remove the old fractured and water-impregnated core, but you need to be very careful not to damage the fiberglass underneath it, since that's the bottom of the boat. Some Hydrostream Comp models did not have a core - they had six stringers though. So, yes, you can substitute a core for stringers and you will have to likely add a layer of woven roving to the bottom where the core used to be. This will add weight, however.

There are many posts here where members detailed their recoring work on Hydrostreams. Here is one from Riverman, where he recored his Viper:
http://www.screamandfly.com/showthread.php?79203

Greg

**tunnels** · 10-18-2016, 09:22 AM

Originally Posted by Scream And Fly

Hi Blackbullet,

Yes, you can remove the old fractured and water-impregnated core, but you need to be very careful not to damage the fiberglass underneath it, since that's the bottom of the boat. Some Hydrostream Comp models did not have a core - they had six stringers though. So, yes, you can substitute a core for stringers and you will have to likely add a layer of woven roving to the bottom where the core used to be. This will add weight, however.

There are many posts here where members detailed their recoring work on Hydrostreams. Here is one from Riverman, where he recored his Viper:
http://www.screamandfly.com/showthread.php?79203

Greg

Woven Roving is possibly one of the worst thing to use !! time to get out from under that rock and look at some of the newer glasses that have been around for the past 5 years or more !, if you choose and do some home work you will find you don't need stringers either !! now that's going to raise some eyebrows !!

**noli** · 10-18-2016, 11:21 AM

.

tunnels,

just curious, what stitch styles are out there that is better than woven roving?

do you prefer bi- triaxial ? other styles?

https://aiki.pbworks.com/w/page/1594...rglass%20notes

.

**tunnels** · 10-18-2016, 07:02 PM

Originally Posted by noli

.

Tunnels,

just curious, what stitch styles are out there that is better than woven roving? WOVEN HAS SOME TERRIBLE HABITS !

Do you prefer bi- triaxial ? Other styles?

https://aiki.pbworks.com/w/page/1594...rglass%20notes

.

all stitched fabrics are better than any woven roving !!

http://vectorply.com/stitch-bonded-reinforcements/

I WILL TAKE THE WORD FROM THIS MANUFACTURE BECAUSE I KNOW ITS TRUE !

**Capt.Insane-o** · 10-18-2016, 07:45 PM

*sigh*

**tunnels** · 10-19-2016, 01:11 AM

Originally Posted by Capt.Insane-o

*sigh*

Use a combination of different glasses you wouldn't need a core of a small boat . THE ORIANTATION of the glass fibers is the secret !!

**tunnels** · 10-19-2016, 01:20 AM

sorry for comments made earlier on seems the rock was not a good choice of words !
any way there are better ways of doing things and woven roving is definite not one of them!

**CUDA** · 10-19-2016, 06:01 AM

Greg has been listening to Scott from AFR ...

For one of those big bad Vipers , I would think a layer of mat , then a layer or two of 1708 or two of 1208 with epoxy and new stringers, would do the trick.

get all the air out,

**Mark Poole ModVP** · 10-19-2016, 03:50 PM

Glasses that have been out for the last 5 years? I was working for a boat builder back in 1990 that was using stitched bi and tri directional glasses.

**Scream And Fly** · 10-19-2016, 04:17 PM

Forgive me, but isn't this guy looking just to make the bottom rigid? He was looking for a core substitute that would be easy. For God's sake I wasn't saying a boat should be built up on woven. A Viper is a tiny boat. I didn't get from the OP's post that he was looking to put together a composite race boat. Good grief.

**rjdubiel** · 10-19-2016, 04:37 PM

http://vectorply.com/laborsaver/

use this? i would think it builds up nice and is super strong.

**tunnels** · 10-19-2016, 05:43 PM

Originally Posted by Mark Poole ModVP

Glasses that have been out for the last 5 years? I was working for a boat builder back in 1990 that was using stitched bi and tri directional glasses.

Me to but have you noticed some of the small subtle changes that have happened to those glasses specially in recent times , They look identical but some the filament's don't have any binder neither does the csm and the filament's are finer and softer as requirement's have changed also as the get used in more places on more products !

**tunnels** · 10-19-2016, 05:55 PM

Originally Posted by rjdubiel

http://vectorply.com/laborsaver/

use this? i would think it builds up nice and is super strong.

yes have used it to replaces mutual layers of woven with a single Quad that was notable stiffer, took half the time to lay, and surprisingly easy to lay !

**Spectre Powerboats** · 10-19-2016, 06:45 PM

Originally Posted by blackbullet40

im about to buy a hydrostream viper it needs a full recore, can you rip out all the old stuff put new stringers but instead of putting core back in just stringers and layers of fiberglass. if not can someone please show me the way on how to do a recore

Call my office tomorrow. I can send you everything you need and walk you through it, 937-292-7674 ask for me. I'll help you get it done. Thanks Todd