merdok

I am in the process of reinstalling my stereo. What i am trying to do is design the fiberglass box in the rear storage container behind the drivers seat.

My plan is to add 3 pieces to my single 10in MDF ring so that its rotor shaped before i lay the fiberglass.

Does anyone have a vector image of a rotor? It would really help me out and keep my structure from looking like a hard triangle. lol

I am not certain that I have ever posted any pics of the car on here. Here is where it stands. 87 S4 Base

puhpaper

iTrader: (6)

Good luck finding this image. I've observed that most rotorheads aren't design savvy, and you'll probably be better off drawing the image yourself in Illustrator. Enjoy.

redlineracer

Is this for a plotter of some sort? I have a bunch of images I used for an engraving machine and a zund plotter. they are not vector though.

merdok

what i need these for is for making a template to figure out what i need to add to a 10in mdf speaker ring to make it look to the shape of a rotor.

Imagine will be three boomerang looking pieces. once attached am going to stretch the top fiberglass over to have it take that shape.

the images to not necessary need to be vector if they are of high resolution.

here is some progress i made this weekend.
http://mofodot.info/?p=64

if you can email me any images you can offer to reckenrode (at) gmail (.com) i would appreciate it.

1SWEET7

iTrader: (1)

I agree puhpaper, but I am a graphic artist & a rotorhead. ... Anyway to I can give you a high res version of a 10th Anniversary badge I have. It is 7 x 5 at 300ppi. I will send you a few different formats of it at high res.

merdok

That image worked out well for my needs. I liquid nails the pieces tonight.

progress here:
http://mofodot.info/?p=73

I am planning on using wood filler the joints and sand a nice line before building the frame. Once this dries i need to figure out how tall to make the risers. not really concerned about sqr vol as there is a bit below, more for the speakers tilt.

merdok

Progress pump

http://mofodot.info/?p=80

s2kguy17

iTrader: (5)

so now your going to attach the cloth to the edge of the rotor shape, to the box? and fiberglass over it?

merdok

That is the plan. going to use fleece first. attach it decently taunt by stapling it to the frame then apply some resin to it. Once the fleece is saturated stretch some fiberglass cloth over top to complete layer one.


Can you not edit old posts? i need to be more careful when posting from my touch screen phone, looks like it auto corrected bump lol

MadScience_7

I like the look, but I would worry about the strength of the fiberglass if you're using large high-powered speakers. Enclosure design is pretty important to the acoustics of a speaker. Fiberglass may end up flexing too much and essentially canceling out certain frequencies with harmonics. Also, internal volume plays a big part depending on the parameters of the driver.

merdok

I am planning on using the remaining ~ 1/2+ gallon of resin on the top for this small area. In total will probably have one fleece and 5-6 fiberglass cloth layers. I am hoping that with enough layers i can get the required strength.

The box is for a single 10in speaker. The generic qlogic box i had it in was 1-1.5 sq foot. I will have a comparable volume in this design.

Have you designed / built these or is this an observation? This was my second one and felt that the progress was going well. fingers crossed i guess? beyond the point of turning back.

MadScience_7

I've done several enclosures both for just subwoofers and full range setups. My experience has been that a cheap driver mounted in a good enclosure will sound better than a high-end driver in a bad enclosure. Here are a couple sites with good info on enclosure design.

http://www.diyaudioandvideo.com/
http://www.bcae1.com/spboxnew2.htm

If you don't have all the parameters for your drivers, you can at least get a good idea of the basics.

Also, polyfill works wonders. I polyfill all of my subwoofer enclosures.