K7boats wrote: midlife wrote:
Tail made & glued into position, thanks to this pic for the detail I needed.
I must have gone through 1000 Gnat photos, it appears no one has ever taken a pic of one from behind...
Engine compartment hatch cut, it's not perfect but I'm working on it.
I've also been experimenting with drawing pins to replicate rivets & unfortunately I think I'm onto a winner, the thought of having to cut hundreds down to length makes me want a beer, I'll go & buy a few boxes tomorrow & see how I get on.
Hello Wayne it's some time since I've posted on website but I have been following your boat looks great can I ask what's going to power it, I've been ill hence no posts for a while ,like to say hello to Mike and all at the BBP the big bird is looking great I've had a long time to think on my model and I'm making a big change to it the tail among other things is been chopped off ! Yep after nearly 3 years of building but with a year of I've decided to make her the 1964 record boat it's just me but I wanted to build the boat which h was part of the double first changed my mind ,but never mind at least I've started all but slowly a hour a day but still enjoying it hope I've posted it correct as I say long time since I posted ,,,,how do I post pictures again? Anyway all the best everyone Al.
When I started the build I hadn't given the power plant much thought, I've never built anything like this, the last model I "built" was probably an Airfix kit when I was a spotty teen.
Now that I've been looking into it, I really don't want to invest the money for a proper jet engine into this model as it's just not proportionally correct, I guess I'm using this build to gain the skills & knowledge required to build a proper larger scale model.
This is 12:1 scale so I think I will end up trying a 90mm electric ducted fan, I'm learning all this remote control stuff as I go along but by the look of it the thrust from EDF's suffers quite badly if the airflow into them is restricted, as we know the air intakes on K7 are the limiting factor, I'll have to make some ducting like the real thing & see how it performs.
Another issue is the size & weight of the LIPO battery to power it all, I think it will weigh approx 1kg & measure 150mm x 50mm x 50mm, so that's an extra kilo of thrust I'll need for nothing..
With the ducting I mentioned earlier it's going to be tough to fit it all in & keep the centre of gravity where it needs to be. Thinking out loud, I was going to make the rear plane out of solid balsa but it would make far more sense to make it hollow & slide part of the battery in there, thanks for making me think, result!
Over Xmas I have to build my grandson a smaller scale prop driven model of K7 so that he'll leave mine alone, I've been out testing the donor boat & all is good, I found a boating lake close to me as well, kids eh!
I've started collecting materials for a jet powered larger scale perhaps 6:1 model, i need to finish this one first though..
I'm glad you're starting to feel better & feel the inspiration to carry on with yours, to be honest your K7 is what pushed me over the edge to build my own, I guess we will be watching each others progress from now on.
Sorry for the War & Peace post, hope I don't get "moderated"