1/10 Shovelnose Racers - What speeds with 1500kv 4s ?

[kevin11]

Setting up a 1/10 scale shovelnose, 1500kv Himax 4s. What kind.of speeds are you guys running? I'm only getting 33mph so far, need to know where I need to be to be competitive.
Thanks

[JimClark]

Should be probably 45 maybe 50 depending on the hull and setup. Who made the hull? Got any video of it running?

[kevin11]

It was built by Leonard Feeback.(spelling?) No video, running by myself
45 sounds doable I've got to move my cg back I think

[JimClark]

CG should be about 1 inch to 1.5 inches being the aft of the sponsor? Up load some pics of the strut, bottom and of the motor

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[JimClark]

What's it weigh ready to run?

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[kevin11]

What's it weigh ready to run?

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Jim, it's 6lbs 5oz RTR
I'll post someone tomorrow!

[kevin11]

IMG_20200517_091533.jpgIMG_20200517_091551.jpgIMG_20200517_091612.jpgIMG_20200517_091657.jpgIMG_20200517_091710.jpg

[kevin11]

IMG_20200517_091727.jpgIMG_20200517_091943.jpg

[JimClark]

Ok I personally would support the stuffing tube more right up to where the shaft exits the tube.
Is there a bearing in the stuffing tube?
Where did you have the batteries located?
Also looks like maybe the prop may be a little deep?
A single 4s pack or 2 2s packs?

[kevin11]

No bearing or bushings on the tube, only bushings on both sides of the strut. I run 2 5200 2s on the velcro, I ran them as forward as I could not wanting to blow over. Is there a specific depth for the strut in relation to the bottom of the sponsons?

[kevin11]

Took a closer look and put the prop shaft in without the strut bushings. Not only is it off center, but the angle of the shaft is off by a degree of 2 from the angle of the strut. So the strut bushings are applying pressure on the shaft. I don't know how straight and centered is normal? What is the angle supposed to be for shaft in relation to the bottom or maybe to the sponson bottoms?IMG_20200518_165852.jpgIMG_20200518_165519.jpgIMG_20200518_165420.jpgIMG_20200518_165658.jpgIMG_20200518_165736.jpg

[JimClark]

With the batteries all the way forward was it real nose heavy?
I don't like that the shaft does not line up with the motor well that is a problem.
When you install the shaft does it go smoothly into the coupler?

[kevin11]

Its not perfect, I am going to make another brace to get it smooth. But I need to know if you think I should cut the tube out and redo it to reduce the strut bushings pressure?

[kevin11]

It was nose heavy
The strut is brass and it was easy to tweak it ban into place. It's so soft it probably got bent a little in shipping. Now just need to make a support at the end of the stuffing tube. Then the shaft should run true. Then back on the water moving the cg back a little at a time!
Thanks for the help Jim!

[JimClark]

if you plan on racing I would buy a good aluminum strut