DF Sniper 45 T-Mono Build Target 100mph

[RaceMechaniX]

OK, so with all the talk about Sniper speeds I figured its time to post a thread on shooting for the 100mph mono. I have been patiently waiting and researching all the threads and watching other monos run before I pulled the trigger on this project. First thanks to the guys who helped me placement of components and ideas: Anbjorn, Peter and Brian.

Here are the links to Peter's build: http://forums.offshoreelectrics.com/...ead.php?t=6901
and Anbjorn's build: http://forums.offshoreelectrics.com/...hlight=anbjorn
The hardware list:

DF Sniper 45 w/5" rails reinforced with carbon on bottom and transom.
Flooded stuffing tube design running 1/4" cable
Lehner 3080 High Amp, fan & LQ cooled. Peter Zicha mount.
Schulze 40.303wk
Hyperion 45C 10s2P set-up
HiTech HS-7980 steering servo
Speedmaster rudder and 1/4" strut
OSE trim tabs and brackets

Prior to recieving the hull I talked to Peter Zicha and we came up with a combined Lehner 3080 and Schulze 40.303WK mount. As is customary he did a great job:





I copied the servo mount idea from Anbjorn which nicely mounted the servo on the right side stringer very close to the transom. Peter was kind enough to machine this for me as well:





After recieving the hull from Steve, I masked the transom in painters tape and using carpet tape I stuck all the hardware on the transom for layout.





Once all the transom hardware was laid out how I wanted, the holes were transfer punched and hardware test mounted loosely.

Cont'd

[RaceMechaniX]

After the hardware holes were drillled, the entire transom and tub were carbon fiber reinforced. Due to the extreme forward motor mounting loaction the wood strigers were extended to allow the rear motor mount pick-up to have a place to screw down to. Carbon work turned out pretty decent.



Following the carbon reinforcement, I copied Brian's very nice flooded stuffing tube design I have seen on his smaller DF mono's. I found some scrap length 1" ID carbon tube cut it to length and with the stuffing tube, motor and strut in place I expoxied the tube in. Shortly thereafter I mounted steering servo on the right hand stringer.







Next steps will be to make a battery tray and strap system to hold the batteries down.

Here is a mock-up of how I expect the batteries will be laid out.



More to come...........

[Anbjorn]

Nice!!
You beat me to it. Ref email sent some min. ago

Good job on laying the carbon fiber.
Did you manage to roll it all the way round to the hatch opening?

Anbjørn

[RaceMechaniX]

Thanks Anbjorn,

The carbon wraps about 25mm beyond the deck seam, but not all the way up to the opening. I have a couple different ideas on how I want to reinforce the deck seam, but have not finished them in till i have everything else in place.

Tyler

[TotalPackage]

Man you got one hell of a setup boss hog.

[Chilli]

The weak spot in my gas Sniper is the deck where it meets the front of the hatch opening. In a high speed stuff the deck can flex in and sometimes allow the front of the hatch to colapse into the boat. I recommend you strengthen that area of the deck as well as the front lip of the hatch opening.

[RaceMechaniX]

Thanks, will do.

Tyler

[Fluid]

Jim's 80+ mph crash at Legg landed his Sniper on its deck, caving in the hatch. While the deck most probably flexed too, the hatch split open and let in most of the water. The hatch definitely needs more strength.


.

[Chilli]

Good point Jay. I was warned the hatch needed reinforcing so I added a layer of FG cloth on the rear 2/3's of the hatch when I put the boat together. So far it's holding up but my "stuffs" are at less than 60 mph. A layer or two of CF may be in order for higher speeds.

[Make-a-Wake]

This is a very nice build Tyler. Can you tell me a bit about the motor.............size, kv etc...........???

Looking forward to seeing it run!

[RaceMechaniX]

The motors I can use are Lehner 3080's and 3060's. I have both 5 and 6 winds of each so there are some options.

The 3080/5 is a 1050kv motor
The 3080/6 is a 875kv Motor
The 3060/5 is a 14000kv motor
The 3060/6 is a 1167kv motor.

One nice design about the Lehner LK motors is that you can wind they as a Wye or Delta. The kv's listed above are all for the Delta wind.

You can check them out here: http://www.lehnermotoren.com/series30/

[MarkF]

Tyler, are you going to bring some electric boats out to the race tomorrow? I will be bringing my P sport hydro and P mono. There going to run open electric with the open gas class but Gary said they will let our electric boats run in our own heat if there's enough boats. Hope you bring some.

Mark

[RaceMechaniX]

I entered P mono, but I guess that class did not make it. I did not enter open, because I am running open offshore. And I don't have a p sport or p hydro.

Maybe I will bring the p mono just in case.

TG

[Punisher 67]

Awesone start so far Tyler........................................

[Make-a-Wake]

The motors I can use are Lehner 3080's and 3060's. I have both 5 and 6 winds of each so there are some options.

The 3080/5 is a 1050kv motor
The 3080/6 is a 875kv Motor
The 3060/5 is a 2100kv motor
The 3060/6 is a 1167kv motor.

One nice design about the Lehner LK motors is that you can wind they as a Wye or Delta. The kv's listed above are all for the Delta wind.

You can check them out here: http://www.lehnermotoren.com/series30/

Wow, just checked and the 3080 is 60mm x 120mm!!