Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => Navy - Military - Battleships: => Topic started by: hover tim on September 25, 2011, 07:51:25 pm
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Hi Guys
I have started a new model its a 1/16th scale BH7 so its going to be big but bigger is better today i made some headway on the beuancy tanks this needs a skin of ply on top there is a 6mm sheet of ply towards the rear this will be held on by captive nuts and a large brushless out runner will be put in the on with a centrifugal fan over the motor.not much to see at the moment though i will keeep the builg log going though
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God were BH&'s noisy. Used to work in the Captains Office at Daedalus next to the main gate. You could hear those things when they started off in the Hovercraft Unit hundreds of yards away. And feel the wind off them.
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I assume you have photographed the Hovercraft Museums BH7 to the Nth degree and have all their drawings? I also have something of a soft spot for the old BH7 and plan one as a future project at some time. Will you be steering via the motor? If so, have you figured out how to mount the pylon strongly enough to avoid any embarrassing mechanical failiures?
Good luck with the project :-)
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yes i have taken some photos of the museums BH7 as for plans i have got a small scale version that did not work too well so i am scaling the structure up and i have redrawn the super structure as for the pylon i am yet to think of a way to do that but it will be steared for the motor just like the real thing
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The good news is, I have no idea how to build that part light enough yet strong enough either!
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A friend of mine is dong the same scale as per the IIN craft so i am sure he will help i was looking about today and i came across this http://www.youtube.com/watch?v=P8YAILii_Ck
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more work has been done over the weekend i have skinned the top of the beuancy tanks and sinned the sides i have made the two rear bulkheads and put of the cabin wall
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more done today she looking more hover like now the side decks were put on today with the rear and remaing sides to do
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its been while since my last update more work has been done over the last few weekends i have done all the side decks and added supporting frames for the rear cabin
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had a few weeks off but i got back on the model and this is the current progress the plylong and box are made from 4mm lite ply cut on a milling machine there is a large brass rod that runs through the pylon this slides onto the next size down and allows the pylon to move then theres a further section of fixed brass tube in the box the whole unit will be held on by captive nuts to allow the box to be removed to gain access to the fan
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Looking good so far. Nice, tidy build. The support for the pylon looks like it should be up to the job!
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thanks for the comments i think the pylon support should be ok its a nice chunk of balsa with a lot of glue on it i wiil also drill a hole and get some nylon nuts and bolts and make sure it will not move still loads to do though
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ha chance to do quite a bit on the model today but i have run out of pins so i will have to wait until the glue is dry
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forgot the pic %)
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ahh the joys of Xmas lots of time for model building, So i have now made the bow door and the removable roof section this is to allow access to batteries etc the bow door Will operate on a servo which i will slow down on my TX the rear of the cabin has also been skinned
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its taking shape very well , i hope you have plenty of building supplies for the xmas break ! jon
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well i maganged to get the bow door working today on a servo next i need to made the bow ramp and yes i have got enough to get me through the Xmas break
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looks like it will be a good fun hover
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Well more has been done over the past few days i made covered the majority apart from the front tow corners as i need some blue foam an i am not sure where to get it from i have made the bow ramp and i have started on the pilots cabin
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try these guys - give them a ring
http://www.sheffins.co.uk/contact.asp
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I've got loads of blue foam if you need any...pm me if so.
Rich
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does anyone know what the propper name for blue foam is and Rich Many thanks for you offer i will look into sheffins and see what they do as i would like to use more of this so i will need to find a supplier thanks
Tim
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whats so special about blue foam ?
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its a light foam that can be cut and sanded to a smooth finnish ideal for large blocks of carving
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dow floormate or roofmate. same stuff different end shape. used to work for sheffield insulations. not many branches hold much stock but at least my local one has old stock going cheap.
phil
does anyone know what the propper name for blue foam is and Rich Many thanks for you offer i will look into sheffins and see what they do as i would like to use more of this so i will need to find a supplier thanks
Tim
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The local B&Q in Portsmouth has the pale orange equivalent in stock in 2'x4'x4" ( i think its 4") at about £7 a sheet. Its in the roofing insulation section. Sands just as well as the blue foam..
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Technical name is Extruded Polystyrene Foam as opposed to Expanded Polystyrene Foam. Easy to spot the difference from 10 paces, Expanded is the original packaging and is comprised of big bubbles (Like in bean bags) bonded together. Extruded has a smooth unbroken surface.
Blue foam has now been "Greenified" and is Pink! Mentioned the B&Q stuff a while ago. Cut with hot wire, scalpel or saw with Bread knife, Sand and seal with Emulsion or skim with paper/card.
Regards Ian.
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Trivia for OZ users.
In Oz, the colour denotes its density, in other words how soft it is.
It is commonly referred to as foam rubber and is available from very soft, pale yellow to almost rigid, dark green and used by florists for floral arrangements as it holds water very well in the flower arrangement.
From memory it disintergrates, turns to dust, over time.
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I think you may be referring to "Oasis" used by florists, a very different sort of beast. The colour blue was the Dow-Corning product I believe and the pink colour was from an other manufacture, I may be wrong there but Oasis the water retaining green stuff is meant to hold water but the blue foam absorbs less than 1% after being submerged for a year. It is used in the construction industry as a base for pouring concrete on etc. The Oasis can be crushed in your fist. Read the Sheffield Insulations pages, the B1 grade is the finest "grain" and is the most dense.
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very interesting
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I went to my local B&Q and i could not find anything suitable i called into Wicks on the way home and i found some its a foam type known as kingspan there are others names for it but its all the same stuff thanks for the helps guys I have been doing some more today the pilots cabin has been made and the mast and support and also been made both are removeable to allow for ease of transport the mast and box can go in the side cabins but the pilots cabin will have to be in a box with the pylon when i get round to sorting one out
(http://s15.postimage.org/goyryshsn/DSCN0019.jpg) (http://postimage.org/image/goyryshsn/)
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Tim , check the Yellow Pages for your local Sheffield Insulations depot. Find out from them if any building sites near you have bought any blue foam and go on a scrounging mission for off-cuts, take the model with you :}
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There's a SI depot in Leeds Tim. Last sheet of Blue foam I got from them was a damaged piece and took a lot of convincing them it would be OK for my use. Nearly had to break his arm to take the price of a "Drink". Since your making big flat areas, you should have a look at using "Depron" sheets. This is EPP - Expanded polypropelene sheet and is being used in preference to Balsa on large scale toy Aeros.
Regards Ian
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I will have to go to the depot in Leeds as for the use of Depron i am not a fan quite easy to damage and EPP does not give a smooth finnish when painting
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more work has been one i have made the fins which are removeable for transporting the model i have also made/used the foam i was after for the front of the model i have put a skim of filer over and sanded more is required to take out and dents one done i will paint on some PVA thinned down with water to seal them
(http://s18.postimage.org/q8pgp59rp/DSCN0028.jpg) (http://postimage.org/image/q8pgp59rp/)
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more has been done i have mounted the lift fan and done some of the detail work she is going well
(http://s14.postimage.org/526usicl9/DSCN0109.jpg) (http://postimage.org/image/526usicl9/)
(http://s9.postimage.org/rucwv39e3/DSCN0111.jpg) (http://postimage.org/image/rucwv39e3/)
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Tidy looking lift fan, I have seen similar in a locally owned SRN6, worked well too.
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the fan was made on a cnc,lasercutter,milling machine so far better than done by hand
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any info on the SRN6 i have got a few thoughts of who it may of been
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Belongs to my mate Ahmed and built on the Isle of Wight by...can't remember his name :-)
(http://s16.postimage.org/qkf6qtua9/IMG_8778.jpg) (http://postimage.org/image/qkf6qtua9/)
(http://s17.postimage.org/ysgnsg597/IMG_8779.jpg) (http://postimage.org/image/ysgnsg597/)
(http://s18.postimage.org/4hrtpue91/IMG_8788.jpg) (http://postimage.org/image/4hrtpue91/)
Really impressive model, although your BH7 is starting to look like it will give the SRN6 a run for its money!!
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ahh yes it was built by Mark Porter on the IOW and Ahmed added sale deatil and working puff ports.Many thanks for the coments about my Model
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Noisy little sods, those puff ports :-)
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yes there EDF fans mounted in the model i dont think they are needed really and its more weight for the model to carry
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more of the rook lats have been put on today and the bow door has been ajusted so it opens futher
(http://s15.postimage.org/zc01dvp3b/DSCN0150.jpg) (http://postimage.org/image/zc01dvp3b/)
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well its been a while but i have managed to do quite a bit since the last post i have mounted the motor and prop cut the pilots cabin windows out and finished the lats on the roof and bow door i have cut the windows out and started the lats down one side
(http://s13.postimage.org/6ptz237mr/DSCN5370.jpg) (http://postimage.org/image/6ptz237mr/)
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Well after a few weeks off i got back to it today more lats have been put on the side and some deatil has been done on the side door
(http://s18.postimage.org/q1lhst4k5/DSCN5702.jpg) (http://postimage.org/image/q1lhst4k5/)
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Hi Tim.
looking good. :-))
Regards Sub.
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Interesting build. Really looking forward to seeing how you make the "skirts".
Colin
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the skirt will be subcontracted but i do know a bit about skirts what interests you
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Hoping we are both refering to the same type of Skirts here. I was looking forward to how you would design the skirt to get that "bulbuous" effect.
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i think we are :-)) designing a skirt is not easy have a look at http://www.rc-hovercraft.co.uk/infoframes.html click on downloads its heavy reading mind click on skirt calculator
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Looking good, what colour scheme are you anticipating on using?
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this is the schems i have chosen http://www.flickr.com/photos/19759955@N07/6559838877/in/set-72157627625929657 but without such items like the life boat on the side
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its been a while but i managed to get back on the build i have done all the lats at last so next job i think is working puff ports that go on the front two each side these steal lift air and vent it from either side to push the front end left or right
(http://s13.postimage.org/4i9siphur/DSCN6149.jpg) (http://postimage.org/image/4i9siphur/)
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Looking Good, You Going to the Boat Convention at Haydock ?.
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Yes i will be there with Kirklees model boat club with this model and a red Griffon 2000
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I am slowly getting on with the BH7 i Recently i have made the puff ports these pop out from the side decks to direct air left or right they are quite effective on the full size craft but i doubt they will do anything at model size they will be hinged later but i have used masking tape for now
(http://s9.postimage.org/3kp2xwj2z/DSCN6568.jpg) (http://postimage.org/image/3kp2xwj2z/)
(http://s16.postimage.org/sb57bzp81/DSCN6567.jpg) (http://postimage.org/image/sb57bzp81/)
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Puff ports work now and connected to a servo and work on the pylon has started
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i have not put a larger pic on my flicker page at http://www.flickr.com/photos/19759955@N07/8292133652/in/photostream
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Its been a while since my last post as I have been getting her ready for paint so lots of sanding and not very interesting to see but that's done now and I have started work on the rivet detail this will take a long time but will be worth it in the end the first pic is the last coat of sealer waiting to be sanded
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Hi Tim. Looking good. Will be on our water this year? What about the paint job are you going to use spray cans? Finally what is the colour scheme applied on this vessel?
Stan. ;) ;)
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Cheers Stan
I am hoping to get it on the water this year but only time will tell :-) , yep I will use Halfords spray paint for the model as for the colour scheme its
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Hello all
I did a build log for this model but its been a while since i updated and i cant seem to find it now.I am making good progress on the rivets still lots to do i think i am up to 3000 now each one pushed in or a hole drilled and pushed in,Both have been dipped in glue prior to been pushed in place
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Link to Original Log.. :-))
http://www.modelboatmayhem.co.uk/forum/index.php/topic,32897.0.html
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Topics merged.
Thanks TLB! :-))
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Thanks Martin
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Holy moly! The attention to detail with all that riveting is... riveting! {-)
Such a good job, truly looking forward to seeing it up on the hover.
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Thanks,Yeah its rivets stuff its taken a long time to do them but i have the radio on in the workshop and i just seem to get on with them easily
Yeah i cant wait to see it hover too
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Hi Tim.
I bet it will have put on a bit of weight with all that brass. %% Worth all the effort in the end though nearly there.
Looking good, nice paint scheme too.
That and my two should look super together.
Regards sub.
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your two will put mine to shame Chris thats for sure
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ITs been a while since i updated the build,I have been putting the skirt on which is not an easy job.the original lift air intake was not big enough so a temp on has been made while i do tests.there is also a problem in that the skirt attached under the hull down the sides is too far inn and needs moving out a the fingers are getting squashed.but so far its promising