RE: aqua 18 engine question
Just take the recoil off and run the stock back plate with the stub staff extending. I don't think there's that much internal drag with the stock back plate. JD
Posted on: 10/27/2009 9:59 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9207811

RE: AQUACRAFT'S NEW MISS VEGAS U-18
[quote]ORIGINAL: sleepy306 This boat is such an improvement over the first boat. So far, the only upgrades I have done are grim turn fin and CMDi balanced and sharpened octura y 535. I gps'd the boat (unfortunately no video) with 60% nitro and it ran 43.5 mph. [b]At that speed, the boat gets a bit flighty and a handfull to pilot[/b]. I don't know if I should give the strut a degree or 2 of down angle to lower the nose or lower the strut. The strut is set as high as the stock setting allows and has 0 degree angle. I can't see how the original miss vegas can compete with this boat stock for stock in an rtr race. [/quote] I stuck 3 oz. of lead on the front of the boat on the inside sponson walls. This seems to help keep the boat running more stable at top speed. I also made a new turn fin bracket from aluminum L material and lowered the Grim Fin. In rough water conditions, this helps keep the right sponson from lifting in a high speed turn. JD
Posted on: 10/7/2009 11:58 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9155552

RE: AQUACRAFT'S NEW MISS VEGAS U-18
[quote]ORIGINAL: Jasontc31 Hey Guys and Gals, I just bought a new Duece and took it to the lake. I am finding that the boat will run fast on the straights the will slow down while I am still on 100% throttle. ? I have almost 3/4 gallon of 30% thru it. The boat is all stock but the grim racer turn fin and grim racer 35mm prop.I have looked over the boat but cannot find any issues. Can anyone help? Thanks Jason [/quote] Is the boat slowing down while running on the straights or slowing down in turns after running fast on the straights? If it's running fast on the straights and slowing on the straights, you should consider richening the needle. JD
Posted on: 9/22/2009 6:32 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9116072

RE: Ms. Vegas ???
If the engine is new, the situation you describe is fairly common. If the engine runs strong in a turn, run several tanks of fuel through it while holding it in a turn. As mentioned, prop size can also effect performance. The 3-blade prop may be placing too much load on the engine. The engine also likes nitro. It will run best on 40 - 50%. JD
Posted on: 9/18/2009 10:08 AM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9105384

RE: AQUACRAFT'S NEW MISS VEGAS U-18
[quote]ORIGINAL: TCHedOff [quote]ORIGINAL: coyv10 Lets talk props, trying to find out prop alternatives with the stock pipe. I already know about the Y535 is the same as the stock but brass, I hve tryed several others but the engine will not pull them. My altitude is about 3200 [/quote] Jerry have you tried reducing blade diameter, backcutting , or taking out some cup on the larger than 535 props
Posted on: 9/10/2009 7:33 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9085153

RE: AQUACRAFT'S NEW MISS VEGAS U-18
[quote]ORIGINAL: coyv10 Lets talk props, trying to find out prop alternatives with the stock pipe. I already know about the Y535 is the same as the stock but brass, I hve tryed several others but the engine will not pull them. My altitude is about 3200 [/quote] I'm basically at sea level and have not had much success with props bigger than the Y-535. The Grim Racer 36X55 is slightly more prop than the Y-535 and worth trying. JD
Posted on: 9/10/2009 10:30 AM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9084037

RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!
[quote]ORIGINAL: 1150ap Jerry i have a question i have played with a few boats over the years mainly riggers but have made a sport 40 and a scale 60. i just got a mv the other day and noticed that the shaft is down quite a bit but is set 1 1/16 below the transom. I have always run straight shaft on my stuff and i have always set the prop shaft just slightly below the rear running surface
Posted on: 8/20/2009 11:09 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9032541

RE: Sk-Daddle Too, gone outboard
[quote]ORIGINAL: Vertical3-D got the prop on, also added some aeromarine adjustable trim tabs...I did this so when it gets out of shape and the nose lifts, there is something to keep it from blowing over and they already have saved it a few times today..[b].JD, the x437/3 worked beautifully[/b], planes out instantly and really flys. the engine wasn't even close to what it will be when broken in and leaned out a little and it's already to fast for its own good. it's a real handful when it hits and chop but handles well for a flat bottom...flipped it once today, upside down in the water for several minutes and the electronics were all fine, it broke the tank loose but I had some CA with me to fix it...what a blast to drive though, I'm really happy with it. If you want a fast sport boat that will keep things exciting I'd suggest building one of these, my last mono clocked 53mph consistently and compared to that I'd guess it hit 40mph a couple times... [/quote] Great to hear you are pleased with how the boat is running. Every now and then I get lucky on a prop suggestion.[:D] JD
Posted on: 8/16/2009 7:31 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9021115

RE: OS .21VZM break in procedure/needle setting
[quote]ORIGINAL: G.W. Well, the 1.5 turns on the high speed needle recommended in the manual for break in is obviously WAY too lean, for any running (thanks, OS). So, what is a good break in procedure for this engine? After break-in, where are your guys' needles at? Thanks [/quote] I suggest you start at 3 1/2 - 4 turns on the HSN. Run four or five tanks through it at a rich setting, but run the engine full throttle and sometimes backed off with the rich setting. I'm at basically sea level and my HSN is about 3 turns open on 50%. JD
Posted on: 8/15/2009 11:32 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9019434

RE: Sk-Daddle Too, gone outboard
I would suggest a different prop than the one shown in the photos. An Octura X437/3 would be worth consideration because it would have less torque. JD
Posted on: 8/11/2009 12:08 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9007610

RE: Bandit crackerbox hull
[quote]ORIGINAL: nitronut ive bought boats from jerry in the past, i live pretty close to him and i know hes got the info because his name is on the boat hull on the mdel sticker saying he built the boat!!!! what size motor are people running in these things , i have several car motors as well as electric setups and a few 40+ marine motors that are obviously too big for the app. [/quote
Posted on: 8/11/2009 12:04 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9007595

RE: Bandit crackerbox hull
[quote]ORIGINAL: Ron Olson Jerry's not on this site but I know of 2 others that he hangs around at plus I've got his e-mail address. I won't give it out in publc though. The rails are probably made to be 3'' apart so that an Octura 3-30 motor mount will fit. The make 2 of those also, one for pull-start motors and the othet not but modding the non-pull start is no big deal
Posted on: 8/11/2009 12:01 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9007584

RE: AQUACRAFT'S NEW MISS VEGAS U-18
[quote]ORIGINAL: pfireproof After having water in my boat, I decided to fill the bath tub and see just where the water was coming in at. Not relizing just how low the boat sets in the water, turns out that the water was coming in from around the exhaust which I noticed is completely under water . Is it just me, or does the exhaust being under water seem a little weird? Granted, wide open, I'm sure the exhaust isn't under water but slowing down or brining the boat in to the shore, it surely has to stall the motor,,,,,,,,doesn't it? Design flaw? [/quote] The transom exhaust is not exiting into the water even at a slow speed. If you are concerned about water entering the hull around the exhaust opening, dab silicone glue around the rubber exhaust tube where it exits the transom. Unless there is a considerable amount of water in the hull when it is running some water in the hull is not a performance issue. JD
Posted on: 8/10/2009 7:48 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9005977

RE: adding a .21 to aeromarine mean machine
[quote]ORIGINAL: beaverboy Video later. I hit another boat today and flipped my cat. Lost the flotation in the cowl so had to quit running before I got the boat on video. [/quote] Yeah, the closing rate between a 21 powered Mean Machine and an 18 powered Vegas kinda caught the "Ol Beaverboy" by surprise. And, JD's coaching Beaverboy in the race and JD's thinking, "Surely, Beaverboy realizes he's closing in rapidly on that Vegas." In hind sight, I should have forgot about the "realizing" and shouted, "Turn your boat." The guy with the Vegas was thinking about removing the rear wing anyway, so Beaverboy just assisted in the decision making process.[:)] JD
Posted on: 8/10/2009 12:15 AM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9003804

RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!
[quote]ORIGINAL: osckar25 hello friends. you will miss vegas and bought a Deuce. Spain I'ma boy and I can not find any forum in Spanish. I have a problem with the miss vegas and want to know if you help. my problem is that I get a lot of water inside the helmet and i want to know if a solution? and also to turn the wheel the engine begins to rise much reboluciones to propel and stop till I put the rudder back straight? perodonen my writing in English so bad. greetings and thanks to all [/quote] If you are running the boat slow, it will take in water. Also, the boat will take in water when it is brought back to the beach. In regards to the speeding up of the engine in a corner, it sounds like you have a new engine that needs to be broken in more. JD
Posted on: 7/25/2009 7:29 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8963431

RE: AQUACRAFT'S NEW MISS VEGAS U-18
[quote]ORIGINAL: TrEsPaSS http://www.youtube.com/watch?v=eZ-obZoMzXI First hard run after breaking in the .18. Only mods are sharpened / balanced 36/55 grim prop and grim fin. GPS results were 39.8mph with minimal mods. Wing since removed. [/quote] Jeez, that speed in that small pond is really good. Good thing the Deuce has a muffled exhaust with all those apartments around the pond. JD
Posted on: 7/5/2009 11:47 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8909596

RE: AQUACRAFT'S NEW MISS VEGAS U-18
[quote]ORIGINAL: barmonkey Just wondering what changes were made to the hull besides the sponsons... [/quote] The sponsons are the only change made to the hull in the Deuce. JD
Posted on: 6/15/2009 10:56 AM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8853433

RE: AQUACRAFT'S NEW MISS VEGAS U-18
A first time out Vegas Deuce, after three or four break-in runs, ran 37.9 on a GPS using 30% Traxxas car fuel and a Y-535. JD
Posted on: 6/13/2009 6:58 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8849601

RE: Lubing the OS 21 OB cable drive
[quote]ORIGINAL: Rehabber Is there an easy way to lube the OS 21 OB drive cable?I'm not certain that the oil that is scavaged from the exhaust residue is suffifient to lube the cable ,especially the top end of the cable. I broke one cable after running 1/2 gallon through theis engine. What type of oil or grease do you recommend? Thanks for the help. [/quote] You can just grease the shaft between runs by using the top exhaust nipple as a zirk and apply a light weight grease into that nipple. JD
Posted on: 6/13/2009 6:53 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8849595

RE: K&B 7.5 Outboard Question
[quote]ORIGINAL: phil6019 I just pulled the head off of the engine to replace a broken bolt and I noticed that the prevoius owner was not running a head shim. Is this OK ?? The engine seems to run fine. Thanks [/quote] The head shim as installed from the mfg. often set the head clearence much higher than needed. If the engine is running fine, then there's no reason to stick a shim in the head. A good setting for head clearence on the 7.5 is between .012 and .015. JD
Posted on: 6/7/2009 12:14 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8832601

RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!
[quote]ORIGINAL: clodbuster What does that do for the performance of the boat? Do you just have to epoxy pieces of wood to the sponsons? [/quote] Our experience with the sponson mods is a 3 - 4 mph increase in speed and being able to run bigger propellers. The parts are glued to the sponsons with either CA glue or epoxy. JD
Posted on: 5/20/2009 5:26 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8785386

RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!
Here's a few photos of the sponson mods on the MV. JD
Posted on: 5/19/2009 11:53 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8783525

RE: tunnel hull newbie please help
to any tunnel boat. Jerry
Posted on: 5/19/2009 7:05 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8782756

RE: 3.5 adjustment ?
That prop is a part of your problem. It looks like the prop that came with the engine "back in the day." Try an Octura M440, X440, or AquaCraft 40X53. And that bored out exhaust opening makes for one loud engine. JD
Posted on: 5/14/2009 2:06 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8768668

RE: Prop for K&B 3.5 outboard
Octura M440 or X440 and AquaCraft 40X53 would work. JD
Posted on: 5/12/2009 5:23 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8763355

RE: AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast!
[quote]ORIGINAL: dyna_rider98 I hate to say it but if the super tigre engine is like the ones they put into Duratrax trucks then Aquacraft made a GIANT step backwards. I had 4 of these engines and they were all junk. [/quote] Isn't it a little early to slam a product before it's even available? I was in Champaign last week and saw the new boat and engine. Grim told me he tested the new engine extensively and was very satisfied with both performance and durability. The sponson mods are very similar to what many of us have added to our MVs. JD(And yes, I have more than a passing interest in the Miss Vegas Deuce)
Posted on: 5/7/2009 9:48 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8749948

RE: miss vegas stiffing tube issue
Sounds like the engine needs more fuel. Open the HSN. Also, change in temp affects HSN settings. JD
Posted on: 4/21/2009 1:29 AM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8700959

RE: Miss Vegas vs. Blackjack26ss
Stick with AquaCraft. The Miss Vegas is a terrific boat.[:D] JD(Designer Miss Vegas)
Posted on: 4/19/2009 8:55 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8696901

RE: SV27 how much weight and where
[quote]ORIGINAL: ka350kaptain I thought it would be better to add the weight closer to the center of gravity of the boat (which I HEARD was about 9" forward of the transom). My flying experience tells me that shifting the center of gravity aft, by placing the weight farther back in the boat, under the radio box, will reduce stability and controlability. Just wondering if this logic also translates into boats. [/quote] No sure if logic always plays a factor in model boats.[:D] I know what worked for me on my SV 27 Nitro. JD
Posted on: 4/2/2009 11:10 PM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8643697

RE: SV27 how much weight and where
It will take a little bit of work, but slotting the holes in the strut will allow it to be adjusted downward. I also place 6 oz. of lead under the radio box. JD
Posted on: 4/2/2009 12:27 AM by Author "Jerry Dunlap" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=8640605