Bby unlimited light ul-1 kit

[Jeff Wohlt]

Here is the one I built several years ago.

http://www.geocities.com/jwohlt5362/ULPAGE.html

I probably have more pics somehwere but yours is looking good...stay with it.

I wourl REALLY change those connectors if running this on 12 cells. Tamiya is a fire hazard when pulling decent amps.

[JBILLINGS]

thanx jeff , man thats a really nice boat ive come across that one before looking for pics of my hull. this build has been a learning exp , my ten cell setup is going to have to do for now and il just keep this boat in the familly. when i can (old lady permiting) i will get another hydro hull (still thinking on style and size) and i think brushless and 12 to 14 cells (dont know if im ready for lipos yet. mini hydros look cool too ! but im gonna paint her up and finish this for , more pics to come.
thanx again
jimmy

[FE Wannabe]

Racing a BBY UL-1

I am also in the process of slowly building a BBY UL-1 as well. I purchased it (more like stole it) here in the swap shop from awhile back pretty much already built.
My UL-1 is built very similar to Jimmy's, but has Randy's racing hardware on it with a .150 flex cable.

I am thinking about getting into racing with this boat, but I am wondering what class do most people run this boat in? I guess it could qualify for LSH, N2 Sport Hydro, P Sport Hydro classes, but I am looking for the best fit to be somewhat competitive.

Any advice would be greatly appreciated.

Brad

Sorry Jimmy, I didn't mean to hijack your thread!

[AndyKunz]

N2 Sport is probably the best fit with today's power systems. I ran one of mine in the O Sport class in 1999 at the Florida Nationals.

Andy

[JBILLINGS]

cool , no problem. do you have any pics of your boat and setup , would really like to see what it is suposed to look like. i am in oklahoma city area and i have never seen any rc boat racing or any other boats for that matter , just got into it to give me something to do to take my mind off disc golf for a while (have to take a year or two off till new baby is big enough to travel). the old lady has been very understanding of both , i am really enjoying the rc thing though and blame harbor freight for the yellow bee that got it all started ! please though if anyone els has pics of ul-1 kit builds post here , i think it would be cool to see more boats like mine and what people have done with them.
thanx for comments
jimmy

[AndyKunz]

Wow, that's asking a lot! My digital photos don't go back that far. What's in the manual? I had a bunch of pix in when I wrote it, but don't know if Randy kept them or not. I'll try to remember to bring the PDF or Word version. PM me your e-mail (it's too big to post). I may also have shots that didn't make it in. I'll do what I can.

Attached is a picture of my 1999 Nats O Sport boat, which won Concours. That's about all I have available right now. Give me a day or two.

Andy

[JBILLINGS]

that is a very nice boat to andy , i notice that the nose on yours as well as jeffs seems a little pointier than mine , is that a trait that was changed or something ? and i wish i would have moved my tail fins back a little more ! i do hope my paint looks half as smooth as yours when i get it done , i was thinking of makeing it a yellow and blue corona boat , ill post pics as i get into it. thanx again for the interest.

jimmy

[AndyKunz]

It's the result of making it as realistic looking as possible. After gluing top and bottom and using epoxy resin to make a fillet on the inside (first manual), I trimmed and sanded off ALL the shoebox overhang and then applied a little filler on the outside and rounded the edge.

It's a lot of extra work, but let me put it in perspective. I built two of these hulls (a red UL-72 Pocket Mechanic and the UL-10 Earls shown above) from scratch in about 2-3 days, sanded and painted. In fact, the gloss coat wasn't fully cured when I boxed the boats up to ship to FL, then ran the snot out of them.

If you find pictures of DTJr with the yellow one, this is the same hull. I forget what happened to my Pocket Mechanic. I used to loan it to friends a lot. Jeff Wohlt got to run it for a while - gave him a new sense of what "fast" is :)

Andy

[FE Wannabe]

N2 Sport is probably the best fit with today's power systems. I ran one of mine in the O Sport class in 1999 at the Florida Nationals.

Andy

Thanks for the info Andy. I just picked up a Feigao 6L 4096kv that I am going to start with and see how it works on 2s2p in my boat.

What prop do you suggest I start with?

I have a 3/16" propshaft so I figured I would start with the smallest 3/16" prop I have (x536) and go up watching my temps after a minute or two of run time.

Is that a good starting point?

Brad

[AndyKunz]

I haven't run that setup, so I can't say for sure. I ran X640 and X642 on mine, but those were with brushed motors on 12 cells.

You are definitely safer starting small and working your way up.

Andy

[RandyatBBY]

That 6L is a little hot if the 537 is too big I make step down 3/16 to 1/8 prop shafts with .150 flex shaft. I would have went with the 8L if it were me.

I do run the 6L in my drag boat with 16 cells and a 432 prop.

[D. Newland]

Just as a point of reference. My last year's N-2 mono was a BBY Ovalmaster 26, 6L, Castle 125, 2S2P 10,000k maxamps packs and an X637/X438 prop.

That was on a well dialed in race boat. You should be OK w/ the prop you want to start with, but check temps often until you are comfortable with your complete setup and that nothing is over-taxed.

[FE Wannabe]

Thanks for the input guys it is appreciated.

Randy,
I figured 30,000 RPMs was a good range for a N2 Sport Hydro so that is why I went with a (6L) 4096kv x 7.4V =30,310 RPMs.

Do you really think (8L) 3072kv x 7.4V = 22,732 RPMs is where I need to be at to heat race it?

By the way, how do you keep a Feigao 6L together at those RPMs?!?!?
4096kv x 19.2V = 78643 RPMS!!!

I figured there would be shrapnel exploding from the hull spinning a Feigao that fast even for 4 seconds.

No sarcasm intended, by the way, I am just a little perplexed.

Thanks,
Brad

[RandyatBBY]

Brad the cells were the 2/3 sub C cells they do not have the power that Lipo does. it was short runs 1/4 mile scale. I still have the boat and after Dan Chase comes back to RC Boats I will be running it.

8L was my choice, Dave has done well with the 6L you got it try it.

[FE Wannabe]

Randy,

Thanks again for your input.

I realize between you and Andy, no one knows these original UL-1 hulls like you guys do, so I will heed your advice.

I will look for an 8L to try as well and probably leave the 6L for the SAW and 2 Lap events.

Brad