MAD Racing Boat Worx 45 Sport Hydro put-together

[jingalls007]

This will be the biggest sport hydro I’ve put together. I won’t be racing this in a sanctioned event as of right now. This is purely a fun runner.
Any pointers or suggestions are appreciated!

Laid up nicely in 12k Carbon Fiber:
A57B5206-60AE-4D08-AC43-348C30D56B03.jpg

I decided to add a layer of 12k cf inside anywhere I could potentially place batteries:
15ADEC50-DEFA-4839-A8A5-CF7B2D7FF5E5.jpg 4D0867CF-0B85-47C5-9BD5-3D4ED7109593.jpg
2B77F701-1A40-48A6-B0A3-F29F890692B6.jpg

With the added cf the boat weighs about 11lbs.
RTR w/lipos it weighs just shy of 19lbs.

I’ll try to keep it lite.

[jingalls007]

Debating on a few different motors:
DBA5BFBE-59E7-48D1-A0A6-1C9EDB18B55E.jpg

The one that looks like the best fit is the big Plettenburg: 6-8k watts
2C88D78E-ADF0-46E0-AEB7-2412DEF57FE3.jpg

I was hoping to get away with the Neu 1539, but it looks like a toothpick in there:
63B3D06F-0D13-4DE9-AE0E-6F21A553C970.jpg

The smaller Plett is similar to the 370S allowed for 1/8 scale hydros, but it also looks too small: 4-5k watts.
8C91A375-D679-46A8-9AA0-6E2092648CFC.jpg

Both Pletts are interchangeable 8s and 10s motors so that gives me some wiggle room for prop use.

[jingalls007]

Transom taped and strut installed. Speedmaster round bottom:
DD724274-42A9-42B8-A1BA-11E74B555736.jpg
Should I use a flat bottom strut instead?

[vvviivvv]

What size is it? over in the UK im not sure what a sport hydro is, hardly anybody runs a hydro

I've just had mine out, 10s and a out runner... running abc 1816 at moment, fast enough and can keep the throttle pinned for 4 mins straight without any heat build up

[photohoward1]

Go with the big Plett

[jingalls007]

What size is it? over in the UK im not sure what a sport hydro is, hardly anybody runs a hydro

I've just had mine out, 10s and a out runner... running abc 1816 at moment, fast enough and can keep the throttle pinned for 4 mins straight without any heat build up

It’s 45 inches long and is considered a sport hydro just like yours. I saw your boat a while back and loved it! How long is yours?

[jingalls007]

Go with the big Plett

That’s the direction I’m leaning toward.

You have a couple pletts right? The 370S?

[photohoward1]

That?s the direction I?m leaning toward.

You have a couple pletts right? The 370S?

Yep


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[jingalls007]

The sponsons have a step or strake. Not sure which one to line the turnfin to:
267E327F-2CFB-4174-B75A-3E2B5B710043.jpg 208DE5BD-D373-4DE7-B36C-F197BF06D59C.jpg

Any ideas?

[jingalls007]

Some 4lb foam in the nose and lining up the mount.
6ED41767-0A33-4070-B562-28D5EE64CC4E.jpg ECDEF3F1-CA7D-4351-9FDA-BF47686130C0.jpg

I don’t like the angle but the motor bottoms out if I go to steep.
64E8ECF8-0A31-46D1-B06B-2850C8FC13FE.jpg

[jingalls007]

Turnfin mounted:
ECB2531C-D225-4919-B1D8-4BBAC83D679D.jpg 7F10CA9E-DBEC-4929-A8C1-3A8CF7A8FBE8.jpg

[meangenesracing]

Debating on a few different motors:
[ATTACH=CONFIG]176706[/ATTACH]

The one that looks like the best fit is the big Plettenburg: 6-8k watts
[ATTACH=CONFIG]176707[/ATTACH]

I was hoping to get away with the Neu 1539, but it looks like a toothpick in there:
[ATTACH=CONFIG]176709[/ATTACH]

The smaller Plett is similar to the 370S allowed for 1/8 scale hydros, but it also looks too small: 4-5k watts.
[ATTACH=CONFIG]176708[/ATTACH]

Both Pletts are interchangeable 8s and 10s motors so that gives me some wiggle room for prop use.

You sure that's not a 1530 neu? If it is definitely don't use that get rid of it, I'll take it off your hands. Ha Ha

[jingalls007]

Ha! It’s a 1539!

[jingalls007]

I couldn’t get the stuffing tube angle right with the stock stringers so I made a couple cf plate rail extenders:
232396F0-B547-44A1-8527-9034B8EC2FA6.jpg 28ACB597-A99F-4985-9209-BE787D8B7202.jpg. 28A8956F-47EF-4BC6-B7E3-720AD95510F4.jpg

[jingalls007]

Yep


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Hold on to them. Plett isn’t producing private use motors anymore; commercial/industrial products only.