Russ Williamson -> AquaCraft U-18 Miss Vegas Hydro Thread_Make it Fast! (6/7/2006 7:03 AM)
After running gallons and gallons of 65% fuel in the Miss Vegas over the last year, like to share a few tips for starting, running and modifying that has increased the performance and user friendliness;
1. Turn Fin - get the Grim 15/18 Hydro Turn fin. Makes a huge difference. The turn fins will be available in about 10 - 14 days.
When manufacturing the turn fins, the leading edge is pre-sharpened. However, it is not feasible to also have the bottom sharpened during manufacturing. Good news, this is easy to do and makes a difference. Take a moto-tool and carefully grind the bottom of the turn fin (from the outside in) making a good sharp edge. Be sure not to change the shape of the cup when taking the flat edge off the bottom of the turn fin.
In the instructions for the turn fins (for our AquaCraft hydros plus the 1/12 LLmar and Elam) you will easily see how the turn fin mounts to the hull. We made so you can just remove your old turn fin, and bolt the new directly in the original mounting locations.
2. Additional sealer inside of hull; It is a good idea to take 30-minute epoxy and thin in down with alcohol and put an additional coat of epoxy between the back of engine to the front of fuel tank. It is best to remove the fuel tank and engine to do this. By making this mod, makes it easier to clean the inside of the hull.
3. Rudder; Even though the rudder has a decent leading edge shape, take and sharpen the leading edge of the rudder. Also, taper the bottom of the rudder to remove the flat area.
You can also take 400 grit sandpaper and smooth the surface. The bead blasting looks really good and this is mainly personal preference.
4. Strut; Leading edge of the rudder also has a good taper already made into it. However, it can be made sharper.
5. Bottom of hull; Get 600 grit wet-dry sandpaper and sand the clear coat off the bottom of the hull and the sponsons. No need to take it down to the fiberglass, just remove the clear coat.
6. Tuned Pipe; Remove the tuned pipe and cut off 1/4!QUOT!. This will relieve the tension that is on the exhaust mounting block in the hull.
7. Strut bracket; If your strut bracket is assembled with the head of the adjustment bolt facing the rudder, remove the brackets and install so the bolt is on the opposite side. Makes it easier to get the head of the bolt to make adjustments.
8. Engine; It can be made to create even more power by.......oh....I can't recommend that, it will void the warranty:)
9. Prop; Sure wish there was something easily available......maybe there will be sometime this year:)
10. Fuel; Burn 30% O'Donnell boat fuel, it does make a difference. The higher nitro that you can afford, the faster you will go.
11. Glow Plug; Red dot O'Donnell sport plug works great!
12. Tuning engine; Be sure to start off rich and start leaning it down a little at time. If using the correct fuel, the engine will !QUOT!sag!QUOT! when you hit a lean setting. When that happens, richen 1/16 to 1/8 turn. Remember, pending on the day, you will need to slightly adjust pending on the air temp, etc.
Hope this helps. I'm having a blast with the Miss Vegas. There will be many at the IMPBA Internats next week in Evansville, IN. We (Grimracer, Jerry Dunlap and myself) are hosting an AquaCraft Challenge IROC type of race were teams have been selected and they will run many rounds against each other, using a different Miss Vegas each round. Winners will be those who turn in the most laps after 4 rounds.
Then we are hosting a !QUOT!Champions!QUOT! Challenge. This will be 6 of the top US-1 National Champions going head to head with IROC Miss Vegas hydros. It will be a site to see. It will be a lot of work for us to keep them all going, but worth it!)
Thanks to the Evansville Club for allowing us to work in this event during the Nationals!
Have fun all~!