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Old 07-25-2019, 09:11 AM   #261
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Originally Posted by PNW Drifter View Post
My boat whole boat is made out of this stuff....

"Chaff and flares are defensive mechanisms employed from military aircrafi to avoid detection and/or attack by adversary air defense systems. Chaff consists of small fibers that reflect radar signals and, when dispensed in large quantities from aircraft, form a cloud that temporarily hides the aircraft from radar detection. The two major types of military chaff in use are aluminum foil and aluminum-coated glass fibers. The aluminum foil-type is no longer manufactured, although it may still be in use."

chaff projectiles
Attachment 91460

Interesting, I could be on to something.....
Were the chaff strips embedded in the fiberglass while the boat was made?

No, you won't detect any difference between the radar reflector if it is above or below the beam. The radar beam is too tight for a side lobe to be reflected back to the receiver antenna.

If you made the mast light extension out of fiberglass, you would minimize your stern shadow caused by the current metal tubing. You will still need two or more conductors to supply power for the light(s) so you'll always have some type of shadow. The closer the conductor or tubing for the mounting the light is to the emitter, the bigger your radar shadow will be.
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Old 07-25-2019, 01:21 PM   #262
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Not sure your radar reflector will be that useful so close to the cabin roof. Flying it on a removable mast (pole) well above the radar, might be more beneficial for ships seeing you in the fog at greater distance. This is often done on sailboats.

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Old 07-25-2019, 02:47 PM   #263
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If his hull has chaff infused in the fiberglass, he may not need the reflector. The higher it is, the longer effective range, but 5 miles out is about all anyone needs to cover.
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Old 07-25-2019, 04:08 PM   #264
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Originally Posted by stubones99 View Post
If his hull has chaff infused in the fiberglass, he may not need the reflector. The higher it is, the longer effective range, but 5 miles out is about all anyone needs to cover.
5 miles is only 15 minutes at freighter speed (20 knots). By the time they figure out you aren't or can't move out of his way, there may be very little he can do to avoid you. A lot more goes into collision avoidance. Being seen 30 minutes to an hour before, dramatically improves options.

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Old 07-25-2019, 04:59 PM   #265
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If the reflector is held head high on a guy standing in a canoe, that's 4-5 miles visibility.
The bigger the ship, the higher their radar, adding to their distance horizon with their radar as well as visibility. With each vessel raising the radar or radar reflector, the distance increases.
The bigger issue on a bigger ship is having someone at the wheel watching the scopes and horizon.
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Old 07-25-2019, 05:52 PM   #266
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With RADAR one can only see to the horizon.
On a small boat that we all generally own, if I recall correctly, about 2-3 mile is the extent of our RADAR

Okay, let the criticism begin. CHUCKLE
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Old 07-25-2019, 07:07 PM   #267
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That is interesting. Your boat may light up like the 4th on radar.
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Old 07-26-2019, 12:55 AM   #268
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https://materialdistrict.com/materia...inized-fabric/

My boat is sheathed in aluminized fibreglass (which is what chaff is). I'd really like to test how reflective the boat is compared to others.

The ball is essentially the same height as the radar, from what i've read of the radar (and reflectors) is that as you increase the height, range increases but its not proportional. The gain is progressively less the higher you go.

5 miles range will be plenty for me.
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Old 07-27-2019, 08:59 PM   #269
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Getting ready.
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Cleaning up underneath.
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Rear gantry.
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Front gantry.
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Starting to hoist the stern.
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Rear gantry. Not sure why it’s sideways.....
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Hoisted. Oh boy, feel the excitement. Crushed one of my fluorescent light fixtures, but I don’t care
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I’m shaking....she’s going to be a tight squeeze.....
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Damn I love the front deck arch. That’s a badass curve.
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(Pause for dramatic effect)......
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Old 07-27-2019, 09:14 PM   #270
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What a pain in the transom.

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Old 07-27-2019, 09:28 PM   #271
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I think you need a bigger shop!
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Old 07-27-2019, 10:56 PM   #272
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Old 07-28-2019, 11:16 AM   #273
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I think you need a bigger shop!
But then I'd have to build a bigger boat.


Alright, looks like I'm centered.
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Safety stump gone.
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Ok, I got it this far, but because the ground dips below the level of the shop, the back of the trailer is rising, and I don't have one spare inch to play with.
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Solution: Build ramps underneath the back of the truck, and more psi in the rear tires, and 20psi in the rear airbags, to push the trailer ball up a bit. I also let air out of the trailer tires. Maybe time for 4x4 low range.....
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Front bunks making contact.
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Yep, gonna have to break out the tools, and move the front bunks. The rears barely cleared.
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7psi in the tires.....I wonder how flat they will look when the weight is on.
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Just a little bit more.....
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The ramp. And I think i'm close enough to start on the bunk adjusting.
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Old 07-28-2019, 11:33 AM   #274
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Tears of joy.....
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Had to move the anchor out of the way.
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Another look at my ramp.
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Front sling is off, front weight on the trailer. Slight sag in tires.
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Time to adjust rear bunks. Bunks need to be higher, so I needed new aluminum c-channel. Of course, do you think I could get an exact match. At least the new stuff is a bit thicker on the wings, which doesn't hurt considering the uprights will be longer.
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Using a jack to push the bunks up to match the boat.
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My crushed fluorescent light. Boat is lower now that the front is actually on the trailer. When the stern is resting on the trailer (not yet), I should completely clear the shop ceiling.
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Old 07-28-2019, 02:18 PM   #275
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Nothing like cutting it close. Good luck!
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Old 07-28-2019, 02:37 PM   #276
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If it doesn’t quite clear, go really fast...
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Old 07-28-2019, 03:11 PM   #277
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Before you put it back in this fall, cut the floor of the shop down a foot. Just trying to be helpful.

Ted
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Old 07-28-2019, 03:38 PM   #278
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Quote:
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Before you put it back in this fall, cut the floor of the shop down a foot. Just trying to be helpful.

Ted
Or raise the roof a couple of feet.
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Old 07-28-2019, 05:00 PM   #279
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PNW Drifter, give me a rundown on your trailer if you don't mine. It looks fairly new. I will be needing one for my barge.





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Or raise the roof a couple of feet.



I have actually helped do that. We unbolted the walls from the slab and inched the building up 4.5 feet. We installed stub walls and set the building back down. It was a long weekend but we managed it without breaking any windows. The doors were still square and opened and shut without binding. Watch that first step. It's a doozy.
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Old 07-28-2019, 07:56 PM   #280
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Save $$. Buy smaller wheels and tires for the load/unload.
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