Sanshandaobojue's airboat building 2017

A general, non-powerplant specific, discussion on airboat technology, ie., hulls, rigging, polymer, etc..
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Whitebear
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Re: Sanshandaobojue's airboat building 2017

Postby Whitebear » Tue Jan 30, 2018 12:15 pm

Since that shaft will have the prop on one end, did you design in a thrust bearing. It is critical to prevent bearing failure.

Everything is looking good so far man.
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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Tue Jan 30, 2018 10:03 pm

pipedog wrote:Looks great Benjamin, you sure do have use of some NICE equipment!!

Thanks, which I want to make a funny/perfect quality airboat for my 5 years son. Mr son known me as a very good naval architect, that's my promise to him I will built a special boat, big toy to him. Then I remember I should built an airboat, most of Chinese people have never seen/heard an airboat.Another 2 friends heard my plan, they are interest in to join, if possible, why not became a business to sell the airboat on China market? So that's all the story until now.

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Tue Jan 30, 2018 10:10 pm

Whitebear wrote:Since that shaft will have the prop on one end, did you design in a thrust bearing. It is critical to prevent bearing failure.

Everything is looking good so far man.


Yes, we really found many design mistake during the production of boat, I nearlly everyday go to the workshop after work, to discuss with the workers, improve the design drawing.

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Tue Jan 30, 2018 10:29 pm

Yesterday we meet a problem, the shock absorber's bolt is too short couldn't installed between the engine and faceplate of engine's foundation.
The shock absorber is orignally ordered from engine manufacture, the bolt is only 20mm, but the engine's foundation thickness is 20mm, there is no space to fasten the bolts. same for face plate of the engine's foundation.

IMG_20180121_115333.jpg

Then I discuss with the worker try to found some solution, for example, welding another section of bolt, or remove the bolts, the finnal solution is remove the bolts and installed a rivet bolts like below.
IMG_20180130_151550.jpg
Attachments
IMG_20180130_151556.jpg

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Tue Jan 30, 2018 10:39 pm

The belt reduction box began to assemble.
I forgot to design a hole before laser cutting, so we have to manually cut hole.
IMG_20180130_135635.jpg
IMG_20180130_114335.jpg
IMG_20180130_141106.jpg

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Tue Jan 30, 2018 10:58 pm

Belt tensioner. I have a little proud of this.
IMG_20180130_114657.jpg

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Tue Jan 30, 2018 11:02 pm

After drill and installed rivet bolt on T bar of Hull, the engine was installed.
Then I found another problem, the lub oil is still summer type, I couldn't star the engine. yesterday temp. -10C( 14F) So today afternoon I will buy some winter lub oil and -20 disel to star the engine.
IMG_20180130_160630.jpg
IMG_20180130_162054.jpg

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Fri Feb 09, 2018 3:49 am

Now looks like a airboat. I am so hurry to sailing.
IMG_20180201_160510 (768x1024).jpg


But still need installed the rudder and steering control.
IMG_20180203_105436 (768x1024).jpg
IMG_20180203_114832 (768x1024).jpg

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Fri Feb 09, 2018 3:51 am

Engine first start :P :P :P :P :P :P :P :P

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Fri Feb 09, 2018 3:57 am

It's half way to succesful. still many things/work to do.
Apply the PA6 to the shell plate with glue, and hot air bending the PA6 plate.
IMG_20180205_094626 (1024x768).jpg

IMG_20180204_162031 (768x1024).jpg
.
Finnally with some steel keep pressure over 24 hours.
IMG_20180205_115427 (1024x768).jpg
Last edited by sanshandaobojue on Fri Feb 09, 2018 10:25 pm, edited 1 time in total.

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Fri Feb 09, 2018 3:59 am

Lifting .
IMG_20180208_140406 (768x1024).jpg

Fixed with wheel table, for next test.
IMG_20180208_152802 (1024x768).jpg

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Fri Feb 09, 2018 4:09 am

Next step is to test the design and caculation for bollard pull or called static pull in aero.

The result is very good. over 30kGf.
I also found some problem for reduction gear, and the engine's speed is only 2500rpm, but the maxium speed shall be 3600rpm.and lots of black smoke, that's means the propeller is too heavy, the engine's torque is not enough to increase the speed of propeller. I should recheck the caculation and make a new reduction rate. So the engine can output full capacity of power 10.5hp at 3600rpm, hopely I can get 50kgf= 490N=110lbf after modification.

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Re: Sanshandaobojue's airboat building 2017

Postby Gary S » Fri Feb 09, 2018 9:00 am

you could ride it round the shop on the table under it. First rule of starting airboat is to make sure everything is clear.

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Re: Sanshandaobojue's airboat building 2017

Postby bkmail » Fri Feb 09, 2018 12:13 pm

How thick is the PA6 you are applying?
Is it UHMW or ?

Are you going to produce many of them?
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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Fri Feb 09, 2018 10:55 pm

bkmail wrote:How thick is the PA6 you are applying?
Is it UHMW or ?

Are you going to produce many of them?
Thanks,Bk


It is PA6, very traditional material, very cheap, because it is free to me, I get 3 piece of PA6 size 1*2m, thickness 3mm. UhMWPE will be better on performance, and I have a special glue for PA6 and aluminium, I don't know what will happen for UHMWPE. I will try on UHMWPE on next boat.

Until now, the airboat is for me and my friends private use, there is no bussiness plan. The plan is only built 3 mini airboat, and 2 bigger airboat with power>200HP. And I am not very confidence with my design, it depends on the final perforamce for this mini airboat. But if more friends and people interesting in airboat, maybe I will produce more, and I am not experienced airboat designer, so I will try to contact some USA airboat manufacture as an agent or joint bussiness. Anyway China market is huge, and until now, there is no airboat in the market.

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Fri Feb 09, 2018 11:15 pm

Gary S wrote:you could ride it round the shop on the table under it. First rule of starting airboat is to make sure everything is clear.

It's cold here, but there is no snow on the road. There is no water in the lake,only ice, and I don't have a trailer for a distance between workshop to the lake. So I am waiting for a big snow. Today I am plan to design and make a trailer for the airboat.
Last edited by sanshandaobojue on Sun Feb 11, 2018 11:47 pm, edited 1 time in total.

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Re: Sanshandaobojue's airboat building 2017

Postby Gary S » Sat Feb 10, 2018 7:42 am

Judging by what you have posted, I'm sure it will be first class.

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Sun Feb 11, 2018 11:48 pm

Gary S wrote:Judging by what you have posted, I'm sure it will be first class.

I hope so, and thanks to all the buddy helps me.

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Re: Sanshandaobojue's airboat building 2017

Postby pipedog » Tue Feb 13, 2018 7:53 pm

Looks good!! you putting a seat stand for one person or two?
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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Fri Feb 16, 2018 7:49 am

2 seats, position not fix yet, will fix after seatrial, because the position of human body will affect the pitch of airboat, I hope the boat runs at horizontally.

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Re: Sanshandaobojue's airboat building 2017

Postby pierson skunkape » Wed Feb 28, 2018 11:33 am

And the one thing I keep hearing out of this guy is the word "CHEAP"... Been a fabricator and exhaust specialist since my father opened our first "Muffler Man Shop" in Daytona.in 1969....any and all material that we have ever gotten from China has been seriously inferior....the dude bought a motor for 195 bucks but was awestruck when the shit casting broke during shipping...no thrust or forces there :shock: :shock: :stirpot: ... and he mentioned that this motor was a copy of a Yanmar diesel I have a Yanmar diesel in my offshore fishing boat and it wasn't $195 I can guarantee you that and it won't come apart like that piece of s*** that that guy's having issues with....when this underengineered mouse trap ever gets to run dry ground...I hope they video it...that thing will come apart and be much the same shape as that Gaytona newspaper that I ran over with my 24 hp. Mower last weekend.. :thumbleft: .... seems like a lot of swimming Upstream to me maybe if you Engineers it right he can go to the Moon with it nobody's been there yet :stirpot: :florida: :usa: by the way Yanmar diesels are made in Japan not China lot of good s*** comes from Japan China not so much

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Re: Sanshandaobojue's airboat building 2017

Postby pipedog » Tue Mar 27, 2018 8:26 pm

Benjamin you have any up dates??
Palm Beach open hull 13'9" with 6.0 F.I. LS - Ox Box and a 3bld "R"

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Thu May 24, 2018 11:53 pm

pierson skunkape wrote:And the one thing I keep hearing out of this guy is the word "CHEAP"... Been a fabricator and exhaust specialist since my father opened our first "Muffler Man Shop" in Daytona.in 1969....any and all material that we have ever gotten from China has been seriously inferior....the dude bought a motor for 195 bucks but was awestruck when the shit casting broke during shipping...no thrust or forces there :shock: :shock: :stirpot: ... and he mentioned that this motor was a copy of a Yanmar diesel I have a Yanmar diesel in my offshore fishing boat and it wasn't $195 I can guarantee you that and it won't come apart like that piece of s*** that that guy's having issues with....when this underengineered mouse trap ever gets to run dry ground...I hope they video it...that thing will come apart and be much the same shape as that Gaytona newspaper that I ran over with my 24 hp. Mower last weekend.. :thumbleft: .... seems like a lot of swimming Upstream to me maybe if you Engineers it right he can go to the Moon with it nobody's been there yet :stirpot: :florida: :usa: by the way Yanmar diesels are made in Japan not China lot of good s*** comes from Japan China not so much


Thans for your reply.
I don't understood why the engine casting was broken during shipping, you should conplained the seller, and your are the very unlucky one. Chinese make many kind of products whith cheaper price than USA and EU, that's because the labour salary low. The clothe made in China, design in Italy. Iphone made in China, design in USA..... Chinese product high quality product and low quality product to serve whe world market including africa and south asia. The quality depands on how much money you spend, and what standard followed. This topic is too big too political, it should leave to the goverment Trump or Xijinping, it's their work. Let's talk about Airboat here.

The yammar really have a very good design on small aircooled disel engine. Designed in Japan, made in China Changzhou. So the Yammar small engine you purchased in USA market, maybe made in China.
Image
http://www.yanmarindustrial.eu/theme/yanmarportal/uploadedFiles/Industrial/productDownloads/Diesel-Engines/LN-LV-LW_ENGLISH.pdf

And the original Yammar engine is expensive, so the joint venture company redesign the engine 10 years before, many Chinese maufacture purchase the copyrignt,and produced the engine, that's what you saw.And the engine also OEM as USA brand ,and sell in USA marked. IF you search the ebay or youtube , you could found may this Chinese revision.
The miniboat is use as first boat of my plan, just for trainning and used for swamp, not used for dry run.
The target is to test my design and calculation, the propeller is just suitable for the engine and reduction gear box, not big, not small , just output the full power of 10hp at maximum speed 3600rpm.
Last edited by sanshandaobojue on Mon May 28, 2018 1:14 am, edited 2 times in total.

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Re: Sanshandaobojue's airboat building 2017

Postby sanshandaobojue » Thu May 24, 2018 11:58 pm

pipedog wrote:Benjamin you have any up dates??

sorry for not update for long time.
Busy work for some offshore drilling rig due to oil price recovery.
The boat is finished and we have a trial in the river nearby. The engine can be start by electric starter or recoil. See the video, and enjoy it.
I have a bollard pull( static force) test, at maximum speed 3600rpm, it is 40kgf=390N=88lbf. For a small 10hp diesel engine, it's very succesful. Totally cost 6000USD. some friends is interesting, maybe produce another 2 or 3, some small modification on the following ones.
And next step is to product airboat 14' long with 100~200hp engine.

Last edited by sanshandaobojue on Thu Jun 21, 2018 10:05 pm, edited 3 times in total.

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Re: Sanshandaobojue's airboat building 2017

Postby airduds » Fri May 25, 2018 8:29 am

sanshandaobojue wrote:.... Chinese product hign quality product and low quality product to serve whe world markedt including africa and south asia. The quality depands on how much money you spend, and what standard followed.

This is exactly correct. The Chinese can manufacture any quality you want. It depends on what you spec.
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