Mounting my lipos in a Apparition-II - RC Groups
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Jun 22, 2012, 01:38 AM
high flyer
stalyoni's Avatar

Mounting my lipos in a Apparition-II

I have an apparition II twin. I need to mount the lipos up under the nose of the boat and I need to know the best way to do this please.

When we last ran it the COG was better with lipos mounted up under the lip of the front of the boat like shown in the pictures below. The only problem was that they where not attached to anything.

I cant really figure out the best way of securing the lipos.

I have since gotten counter rotating props and a counter rotating flexishaft. I have taken the stock motors out of it and I have two tacon 2858 2681kv motors in it. I use two 3s 4000mah zippy lipos. It has two 70a escs. For the props im running two 38mm 1.4 props.

I have not run the boat with these 38mm props yet but it should be alright with my motor and 70a esc and should give a bit more speed. We have also adjusted the height of the prop angle and should sit more in the water now.

Just need help to mount the lipos securely.

If I mount the lipos on the deck of the boat in the middle then its too tail heavy. The 3s 4000mah lipos only just slip up under the lip of the nose. They already have the female side of velcro but if i put the male onto the boat it would be to thick to fit.

Any help would be great thanks.
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Jun 22, 2012, 05:44 AM
high flyer
stalyoni's Avatar
anyone. Im hoping to take it out in the morning
Jun 24, 2012, 12:19 AM
Registered User
I have used a little Double sided tape?
Jun 24, 2012, 01:03 AM
Registered User
CornelP's Avatar
I would move the ESCs to the center, on the tray and get the batteries is the sponsons. It will give a better and lower CG, plus more room to adjust. A strip of FG or CF epoxied to the bottom, velcro on it, a couple of straps and you'll be good to go.
Jun 24, 2012, 01:23 AM
Registered User
Pseudonym's Avatar
There's no possible way that the best CG is with the batteries that far forward. If you need the batteries up there for the boat to run correctly, try adjusting the strut angle. The motors are already in the center of the hull...if anything I would think the batteries could stand to move toward the rear, not the front.
Jun 24, 2012, 01:33 AM
high flyer
stalyoni's Avatar
so what angle should I have the props at and where should i mount the lipos then?
Jun 24, 2012, 01:33 PM
retired ATC
ron1950's Avatar
we built one with two feiago 9xl motors in it but moved the motors way back toward stearn and used 4000 ma lipos in each sponson as 5000 turnegys were too big to fit in there....
Jun 25, 2012, 08:46 AM
Sydney, Austrailia
G'Day Stalyoni
I have an apparition twin and with 120A esc's mounted in front of each motor, I then mount the batteries in the center where the stock mounting plate is fitted and just velcro down. But move the batteries towards the front of the hatch opening. I use struts angled just higher than parallel with the bottom of the hull. Use a straight edge to gauge this, but only 1mm to 3mm up at the prop end of the strut seems good. I have seen set-ups with a single 4s,5000 battery (approx o.6kg, with motors in parallel) setup under the bulb of the hatch cover which places the C of G a fair way back, and it still goes very quick and in control. As a guide the C of G should be about 1/3 from the back. By the way, we race at Sydney / Penrith regatta center, look up MBC of NSW web page.
Regards Kruisen

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