Scale 50" Apache - Electric - Aeromarine

[bonefisher]

Been a while building some scale float planes and the like but was fortunate enough to get a house on a nice lake and now loving the boats...

I have worked on a couple of marine projects... a F1 Exceed Outboard and a 6S Spartan someone gave me... had lots of fun trying to make them look scale and perform well... and had some success....

So always wanted to build a scale looking old style cigarette but could not get past the straight shaft and offset rudder set-ups in the pursuit of scale... then saw this amazing builder (Chips of Chips Outboards) who did some mind blowing stuff... like true craftsman work...

Low and behold, he puts a new boat he just began work on up for sale and I grabbed it... Some photos here... and now beginning to put together the parts list with the help of Steve at Offshore Electric (who is great at service)... More to come but wanted to share the beginning...

I am sure I will need lots of help and thoughts... but also wanted to put this up in case someone else goes down this road...

[bonefisher]

So far the equipment list is as follows:

Radio - Spektrum DX4s / Receiver SR410 / Scale Parts - M.A.C.K. / Motor - Leopard 56110 -780 KV / ESC - Swordfish 300Pro / BEC - Castle PRO High Output / Steering Servo - HS5765MH / Connectors - 8MM / Batteries 5S - 5000 (2)

Working on some wiring diagrams now to make sure I am doing it all right... appreciate any and all feedback! This is a big jump for me so help is so welcome!!

[Tamelesstgr]

Man that looks trick! Love the realistic outdrive. Tell that guy to hold onto the steering wheel........

[bonefisher]

Thanks Tamelesstgr!

Here is the mock of the wiring diagram I have worked up... love any thoughts!

[FormulaZR]

Love that M8 look!

[bonefisher]

Thanks everyone for all the help and feedback!!! Got the 1/4 Scale Servo in last night... quite a beast... should move the sterndrive no problem!Servo.jpg

[madmikepags]

To make that boat run, you are going to need a lot more power than 10s 5000's, those batteries are going to be working very hard to get that boat moving, I would go with 10's 12'000's. Remember you have an outdrive that has a subsurface drive, your prop will be completely submerged where we mostly run surface drives here. I have the same exact hull and I'm planning a similar power plant but going with at least 12,000mah and thats with a surface drive. Also I wouldn't use a BEC I would just use a battery pack for the receiver, a 2cell LiFe 2500mah pack will last all day and that servo is gonna pull some amps turning that big boat.

[madmikepags]

just curious, what is that circuit board in the diagram?

[egneg]

The circuit board is a HV cap bank (underside). And I would also run 10S2P on that boat. Any thoughts as to what prop?

[Doby]

I commented on your thread on RC Groups (i think thats where it was)..I'm not familiar with that out-drive, but my concern is whats inside it, gears/cable???

If it was designed for gas boats, then there may be issues with how long the innards will survive with an electric motor.

[bonefisher]

Hello everyone and THANKS for all the feedback...

1. The Capacitor bank is a Hifei bank... link is here --- http://www.offshoreelectrics.com/pro...d=hef-h%230007

2. Great comment on the battery vs. BEC... debated that one at length... thought it would be easier to run a HV BEC but looking at it with fresh eyes, maybe a life pack would make a simpler installation - but the servo is rated for 2S lipo... so that may be better.... any thoughts???

3. In regards to batteries, original vision was to run 2 5S 5000 40C... guessing wont go over 200amps so would be ok?? ... but the capacitor bank makes it easy to run 10S2P - so order 2 3s5000 packs and see how the run time and pull is, and if any concerns, just dupe the order and run 10S2P 10000? --- Would love thoughts here...

4. Doby - in regards to the stern drive, it is gears - here is what their site says --- ("The M8 gear set is not machined from just standard hardened alloy, but from alloys made with a compacting process of powder metallurgy; this is the same technology used for gears in full size automotive transmissions. The gears have thicker and stronger teeth designed to permit engines up to 10hp to be used for blistering speeds. As well, the gear design allows for counter-rotation when you go for the ultimate and fit twin M8 drives on your boat.") --- so designed for 10HP... was thinking of using super soft start on ESC and possibly exponential on the throttle as well... I have spoken to one other person who has run them on electric and no issues so far... but definitely not a standard straight drive setup... so some learning for sure...

Thanks All!!! Going to be a fun project ;-)

[Sonic24]

In your picture of the wiring diagram, you show a jumper. I use the same Hifie cap board and 8mm bullet connectors everywhere and no need for a jumper.

Please post video when running. Looks awsome!

[bonefisher]

Sonic.... thanks for the response... help me understand... I did not mean to show a jumper... I show covering the two non-used plugs if not running 2P... Can you send a photo of your wiring?

Let me know on the jumper issue!! THANKS!

[Sonic24]

Why the jumper?

In your post above showing the wiring plan, there is a triangle shaped jumper.

In the attached picture, I show how I run two 3S batteries in series to make a 6S configuration. If I want longer run time, I run two other batteries to the remaining Hifei cap board connections. No triangle jumper needed.

[madmikepags]

Get 10s2p 6000's for a total of 12,000mah is what I would do, the continuous amps is not what will send you over the edge but getting that size boat moving and turning will create large amp spikes I would not use 40c batteries I would go with 65c. always leave yourself lots of headway in terms of amps with batteries, if you think it will pull 200 amps make sure your batteries can handle 400, (12,000mah 65c =780amps) at least thats the way i think about it. Use a 2S lipo that way you can get the full power out of the HV servo also, I use LiFe just because my receivers are not HV.