Darin's Vac-U-Pickle

[Flyguy55]

I did 3 test runs today on our small pond . Its only 290' by 125'. cement walls all around
The first run it was a little flighty . At the end of the straights it would rock from sponson to sponson ,dumping air I think. I lowered the strut 1/16th and added about 1 deg neg to the prop shaft.
no temps were over 110 f.
The other 2 runs were loose , but not flighty.
I need to take it to a bigger pond and some race water.
I couldnt be more pleased .

[flyboy320]

I've never installed a stuffing tube before, and I will be installing mine hopefully next week. When making the bend at the bottom of the boat (outside the hull), what distance or clearance do you make between the bottom of the boat, and the centre of the tube? What I mean is, how far down do you put the stuffing tube under the boat?

Since the strut that the prop shaft goes into can be adjusted up and down, how do you know where the stuffing tube should sit?

[Doug Smock]

I've never installed a stuffing tube before, and I will be installing mine hopefully next week. When making the bend at the bottom of the boat (outside the hull), what distance or clearance do you make between the bottom of the boat, and the centre of the tube? What I mean is, how far down do you put the stuffing tube under the boat?

Since the strut that the prop shaft goes into can be adjusted up and down, how do you know where the stuffing tube should sit?

I sent you a link to the Vac-U-Pickle build page. The initial adjustment for the strut is 3/4" from the center line of the strut to the botom of the boat.

Doug

[fastbaltek]

THIS will be my next purchase for sure, im building the same thing, cept i scaled mine to 25inches or so.

[Ub Hauled]

I thought I share the beginnings of my proj.
Have not decided on where to place the waterlines
and what the final setup will be.

[Flyguy55]

If I had it to do over , I'd run aluminum tubing along and attached to the ply stringers up to the ESC area. Like you would in a nitro rigger through a radio box on both sides, probably just above the servo. I'd have a little kick up at the outlet end . Hopefully I could see the water coming out .
I will on my next one with SV 27 power .

Dick

[peells]

Man that little boat is sure getting a lot of response.

[flyboy320]

Does anyone know the dimensions up front where the batteries go? I am looking at some 4S lipos and need to know if they will fit.

I understand the width is 4", what about the height and length clearance?

Thanks :)

[Flyguy55]

At the very front the depth is aprox 1/2" just in front of the motor its 1 1/4" .
Yes 4" wide. For 4S its better to run 2 x 2S packs in series.

[Doug Smock]

Does anyone know the dimensions up front where the batteries go? I am looking at some 4S lipos and need to know if they will fit.

I understand the width is 4", what about the height and length clearance?

Thanks :)

You have 3 7/8" between the rails. You shouldn't have to place the cells any farther forward than 1 7/8" BACK from the front of the hatch opening. At that point you have 5/8" between the bottom of the lip of the hatch opening and the floor of the hull.
The LiPos we tested with are the Neu Energy 25 /30 and 30/50 4900s. Two 2s packs. They measure 11/16" H X 1 3/4" W X 6 1/2" long.
They fit perfectly side by side between the lips of the hatch opening and are level with the hatch opening at the forward most point when placed 1 7/8" back as described above. Clear as mud?

You can get by with cells that are a tad wider as long as they are approx 5/8' tall.
They could be placed under the lip of the hatch opening. Length shouldn't be an issue.

I hope this didn't leave you with more questions than answers.

Doug

[flyboy320]

Thanks guys, makes perfect sense ... :)

[Doug Smock]

What cells are you using Dick?

Doug

[Darin Jordan]

Just for another option for 4S guys... the new Elite 5300 cells are longer, but thinner, than the PolyRCs and the Elite 4500 cells... I haven't tried it yet, but I think one of those might fit in front of the motor, though some club's 5000mah limits might make this impractical...

[Flyguy55]

What cells are you using Dick?

Doug

I have been using 2X2S1P Poly Quest 3300s in series in my N-2 set ups . We race a mile .

[Jeepers]

I have been using 2X2S1P Poly Quest 3300s in series in my N-2 set ups . We race a mile .

Dont you mean in parallel?

I dont wanna try keeping up with you if they are wired in series!

I already have enough trouble as it is!
Looking forward to seeing you Sun, Flyguy!