All you need to do is make a five-sided box. Big enough to cover the engine. But give the box a 6 inch air gap or vacuum along all five surfaces. So basically just two boxes. One with a outer diameter 6 in larger than the inner. Giving you a 6-in inner gap. To fill with air or vacuum. And while the construction of such a boxes is not free. The insulation is. And the insulating capability of a vacuum is unbeatable.! And it could totally be done with fiberglass which we all know is your favv.
Always handsy having a moist sponge in the knowledge department. Hope the acoustic stuff work's, noise can be really, really annoying after just a short time. great update 2x👍
Are there any active noise cancelation solutions that might work good for you? First I thought for the whole cabin but some Bose headphones might do a good job for personal use too.
@@AlexHibbertOriginals I ve personally only tested a Bose noise cancelation headphone for a couple of minutes but it felt really quiet even without music.
One of the biggest sources of noise is the induction noise. The “air filter” can also be used to reduce induction roar, as well as restricting dust and dirt ingress. Your engine has a very primitive device with virtually no acoustic limiting effect. Also resonant noise from the prop shaft and gearbox needs to be controlled. Have fun.
Stop being so short with us... me, for example, would like to see more of the intimate details of said processes and details of the comings and finds of everything involved in the birth of one of my dream boats.... regardless loving the good work, I can't wait to see the finished product doing its duty.... RELIABLY 🤞
As someone that is quite sensitive to sound. I sincerely hope the place you rest at is somehow in a dead spot for the lower frequencies as much as possible. Only time will tell.
@@AlexHibbertOriginals Considering the conditions, even people that don't usually snore, will make noise in those situations perhaps. Good ear plugs help a ton. Also, I'm really happy with how often you upload. You mentioned it would in increase in a precious video, but still, that takes effort..
one would think that you would need to line the floor of the engine bay as if not the noise could escape through the floor to adjoining rooms , plus my thought would be to line the Whole boat , not just the motor room .... cost a lot more but think the noise would be more diminished
I was considering Tecsound for my engine but I have a issue with fire rating of that material B, s2, d0 B - Combustible materials d’ part relates to ‘flaming droplets and particles’ during the first 10 minutes of exposure. ‘s’ part relates to total smoke propagation, during the first ten minutes of exposure B= Very limited contribution to fire D0 = none S2 = quite a lot of smoke Did you consider the above specifying your project?
What does it look like putting your books on Audible? I love your stories but do all my "Reading" on my commute. I know it's gotta be rough with the reading (because let's be honest you need to read it) but I would buy and download every one of your books. I'd buy all the physical ones too, but I'd never be able to read them with ADHD and my schedule.
You're right that it's a huge time commitment if doing your own audiobook. And I can't afford Stephen Fry.... If I get down below 12 hour working days I'll consider it!
I can't remember what you have for vibration isolators between the engine and hull itself. You might want to do some research for alterative (modern) solutions. Car manufacturers have spent millions of dollars building better iterations for diesel engines -vs- what is installed in your lifeboat originally.
Car manufacturers line their cars with Mass loaded vinyl. that's the original use then it moved to domestic and commercial applications. MLV100 or Tecsound 100 is the best option.
@@skf957 Of course, no one wants you to shell-out all by yourself. And I for one wouldn't like for these puns be be egg-nored. We've got to hatch a plan to keep this thread going!
@@AlexHibbertOriginals I am an audio hobbyist. I can believe 30% or 3db but 30db? Normal ambient background noise level of a typical living room is 40db. That's without speech. I would want to see that reduction shown on a db meter. I ran across this video because I was looking for engine compartment insulation results. I watched a video of a guy who (using a different product) carefully insulated his engine compartment with a good product and achieved a 3db reduction in noise level. Here is how the decibel scale works... On the decibel scale, 0 dB is the smallest audible sound. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. A sound 1,000 times more powerful than near total silence is 30 dB.
![DIY bow railings - new safety additions before Alan's launch. Lifeboat Conversion Ep79 [4K]](http://i.ytimg.com/vi/Q6lndzMcOlY/mqdefault.jpg)
![DIY bow railings - new safety additions before Alan's launch. Lifeboat Conversion Ep79 [4K]](/img/tr.png)
![Lifeboat Conversion Ep22: Repairing the hull with filler and fibre glass [4K]](http://i.ytimg.com/vi/jg2opSD5wRs/mqdefault.jpg)
And life trudges onward, your videos are the best, it’s like listening to “books on tape” keep up your great work
Cheers
All you need to do is make a five-sided box. Big enough to cover the engine. But give the box a 6 inch air gap or vacuum along all five surfaces.
So basically just two boxes. One with a outer diameter 6 in larger than the inner. Giving you a 6-in inner gap. To fill with air or vacuum.
And while the construction of such a boxes is not free. The insulation is. And the insulating capability of a vacuum is unbeatable.!
And it could totally be done with fiberglass which we all know is your favv.
Always handsy having a moist sponge in the knowledge department. Hope the acoustic stuff work's, noise can be really, really annoying after just a short time. great update 2x👍
Cheers
@@AlexHibbertOriginals 👍👍
It's starting to feel like we're in the endgame of Alan's modifications. I bet if feels good to shave more and more off the to-do list.
Are there any active noise cancelation solutions that might work good for you? First I thought for the whole cabin but some Bose headphones might do a good job for personal use too.
Worth a thought.
@@AlexHibbertOriginals I ve personally only tested a Bose noise cancelation headphone for a couple of minutes but it felt really quiet even without music.
So satisfying watch the build of Alan
Its coming along quite nicely. Keep up the good work :)
One of the biggest sources of noise is the induction noise.
The “air filter” can also be used to reduce induction roar, as well as restricting dust and dirt ingress. Your engine has a very primitive device with virtually no acoustic limiting effect. Also resonant noise from the prop shaft and gearbox needs to be controlled. Have fun.
Yes the original air filter is in the spares box. I have an induction silencer to fit soon.
Great video but what was the outcome? Couldn't find a fallow up video
Good observation. I have a folder of footage awaiting context.
Stop being so short with us... me, for example, would like to see more of the intimate details of said processes and details of the comings and finds of everything involved in the birth of one of my dream boats.... regardless loving the good work, I can't wait to see the finished product doing its duty.... RELIABLY 🤞
As someone that is quite sensitive to sound. I sincerely hope the place you rest at is somehow in a dead spot for the lower frequencies as much as possible. Only time will tell.
Having slept in tents with snorers, I've long got used to using little mouldable silicone ear plugs.
@@AlexHibbertOriginals Considering the conditions, even people that don't usually snore, will make noise in those situations perhaps. Good ear plugs help a ton.
Also, I'm really happy with how often you upload. You mentioned it would in increase in a precious video, but still, that takes effort..
Did he ever make a test on this?
It is probably a redundant question but how does it perform in cold with condensation?
It's impermeable and doesn't trap air, so if there's condensation without, there'll be condensation with it too.
one would think that you would need to line the floor of the engine bay as if not the noise could escape through the floor to adjoining rooms , plus my thought would be to line the Whole boat , not just the motor room .... cost a lot more but think the noise would be more diminished
Customs Declarations are a pain in the fingers when shipping from the US.
I was considering Tecsound for my engine but I have a issue with fire rating of that material
B, s2, d0
B - Combustible materials
d’ part relates to ‘flaming droplets and particles’ during the first 10 minutes of exposure.
‘s’ part relates to total smoke propagation, during the first ten minutes of exposure
B= Very limited contribution to fire
D0 = none
S2 = quite a lot of smoke
Did you consider the above specifying your project?
I did. The cowling it's mounted to is made of wood!
I did do a flame test in an episode, and couldn't get it to ignite or smoke with a low temp flame.
What does it look like putting your books on Audible? I love your stories but do all my "Reading" on my commute. I know it's gotta be rough with the reading (because let's be honest you need to read it) but I would buy and download every one of your books. I'd buy all the physical ones too, but I'd never be able to read them with ADHD and my schedule.
You're right that it's a huge time commitment if doing your own audiobook. And I can't afford Stephen Fry....
If I get down below 12 hour working days I'll consider it!
@@AlexHibbertOriginals sounds great, I'll hold out! Don't hire one of the hatchet jobs that make Hemmingway sound boring!
I can't remember what you have for vibration isolators between the engine and hull itself. You might want to do some research for alterative (modern) solutions. Car manufacturers have spent millions of dollars building better iterations for diesel engines -vs- what is installed in your lifeboat originally.
True. Just normal rubber engine mounts. To replace these would be a big job, needing to support the engine weight and decouple from the prop shaft.
Car manufacturers line their cars with Mass loaded vinyl. that's the original use then it moved to domestic and commercial applications. MLV100 or Tecsound 100 is the best option.
I remember a Lenny Henry comedy about radio Brixton taught me that egg cartons were good for soundproofing
They're.. quite flammable and aren't efficient at all. Combine that with an engine bay and you can imagine how that would end.
@@LSR303 if you leave the eggs in them, then everything will be fine
@@davecoz4227 No yolk, that's an eggcellent idea. I think that would crack it. Shell I stop now?
@@skf957 Of course, no one wants you to shell-out all by yourself. And I for one wouldn't like for these puns be be egg-nored. We've got to hatch a plan to keep this thread going!
7:32 This part had me on the edge of my chair. I was disappointed that you left out the edgy scene at the end... I played the first one twice.
NO IDEA .............
✌😎
Is the owner of SRU South African? 🤔
yes :)
@@lloyd1886 good to see Saffers making it abroad
30db reduction in sound? Seriously, that's huge and I'm not sure I'm buying that. The decibel scale is logarithmic so a 30db reduction is enormous!
I'm not sure they can advertise those stats unless tested as such - we have strict advertising standards here.
@@AlexHibbertOriginals I am an audio hobbyist. I can believe 30% or 3db but 30db? Normal ambient background noise level of a typical living room is 40db. That's without speech. I would want to see that reduction shown on a db meter. I ran across this video because I was looking for engine compartment insulation results. I watched a video of a guy who (using a different product) carefully insulated his engine compartment with a good product and achieved a 3db reduction in noise level. Here is how the decibel scale works...
On the decibel scale, 0 dB is the smallest audible sound. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. A sound 1,000 times more powerful than near total silence is 30 dB.
I understand how log scales work.
The product clearly states its Rx rating, so you'd have to take it up with them.