New recumbent QUAD build (OEM project)......

Discussions related to motors other than hub motors.
This includes R/C motors, botttom bracket, roller and geared drives.
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recumpence
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Re: New recumbent QUAD build (OEM project)......

Post by recumpence » Apr 06, 2017 12:37 pm

OK, update;

-My 50lbs of lipo is on its way. I just got word form Hobby-King that the back-order was released.
-The fat tire kids bikes I am using the wheels and tires from are due in today.
-I ordered a new 5 turn 6 wire motor for Delta/Wye switching today.

Also, I am building the fat tire wheels, and the wheels shown in the first picture for comparison.

I will be building widened suspension as well as testing the stock suspension. Outrider wants to be able to test this quad against one of their stock trikes with the same wheels, tires, and overall width (and ground clearance). So, I will have many iterations to show you guys on this build.

I have some really cool ideas for the widened front suspension.

Oh, also, I am making nerf bars for the sides on the chassis to protect the rear wheels. They should look really cool!

Lastly, Tom from Outrider and I have been discussing component layout. For a reverse trike (Tadpole) layout, you want the CG to be very forward biased for stability (Keeping the weight between the front wheels). However, for a quad, the CG should be near the center. So, I will be mounting my packs rearward in the box and moving the seat to the rear most adjustment location for a more centralized CG. This should improve handling quite a bit.

I am hoping to continue an on-going relationship with Outrider to develop this vehicle to its limit within the basic layout of the chassis. I really enjoy this kind of work, and they could use the help without hiring and paying another full time engineer. This seems to be a good relationship, all things considered.

Matt
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Re: New recumbent QUAD build (OEM project)......

Post by macribs » Apr 06, 2017 1:59 pm

As we've seen in your other build threads you have a habit of delivering the goods every time. Looking forward to see this Quad come to life.

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Re: New recumbent QUAD build (OEM project)......

Post by SlowCo » Apr 06, 2017 3:36 pm

I'm subscribing to follow this build.

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Re: New recumbent QUAD build (OEM project)......

Post by recumpence » Apr 12, 2017 7:54 am

Some new lipo! What you are looking at is 12s-100ah of Multistar Lipo. 55 pounds of goodness! This pack should be good for 100 miles of range. As you can see, there is room in the chassis box to accommodate double that. I would never use 200 miles of range, though. But, it is a cool prospect.

So, at 100ah, does that makes this quad a P100? With twin motors it would, then, be a P100D. :mrgreen:

Matt
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Re: New recumbent QUAD build (OEM project)......

Post by fechter » Apr 12, 2017 8:12 am

Wow, that's a lot of Lipo. Let's hope it never goes off. An all metal battery enclosure is really good feature for fire safety. You should have no shortage of power for the motors and a nice low C rate.
"One test is worth a thousand opinions"

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Re: New recumbent QUAD build (OEM project)......

Post by recumpence » Apr 12, 2017 8:28 am

fechter wrote:Wow, that's a lot of Lipo. Let's hope it never goes off. An all metal battery enclosure is really good feature for fire safety. You should have no shortage of power for the motors and a nice low C rate.
Yup, I figured the same. I am using Multistar Lipo in my Raptor in an 80ah guise. The low C rate sure does help things. I have found that true in every high kwh build I have setup.

One thing I do for safety is set my charger to top out at 49 volts. The LV cutoff in my controllers is set at 40 volts. This keeps me well within the safety margin at least from a voltage standpoint. Anything can happen, though. Then again, I do not store any gas cans in my garage. I have seen numerous garage fires from gas cans or solvent rags in buckets. Care should be taken in everything we do. I real feel for those who have suffered loss in fires.

Matt
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Re: New recumbent QUAD build (OEM project)......

Post by recumpence » May 17, 2017 11:16 am

Sorry for the delay updating this thread. I was waiting on rear end (quad) parts from the machineshop. But, at this point, I am building it up as a trike first, then converting the rear end to the custom quad axle. That should give me a great comparison between the two.

I have almost everything I need for the build at this point. I will begin assembling the chassis and lacing the wheels very soon.

Matt
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Re: New recumbent QUAD build (OEM project)......

Post by recumpence » Jun 29, 2017 6:56 am

Progress! I bet you guys were wondering what was going on. :D

The machined parts for the rear end are finished. You can see the clamping style of the various parts. They clamp around the axle with a fifth bolt passing through the axle as a locating pin. The axle is a thick wall carbon fiber tube turned down to the proper diameter. The complete assembly shown weighs in at 2 pounds, 5.8 ounces with fasteners! I cannot believe how light it is. I can stand in the middle of the axle with no deflection. If I bounce on it, I can get a small amount of flex. Perfect!

I have enough parts for 5 complete axle assemblies.

The cool part of this modular system is flexibility. I can make a longer axle or a shorter one. I can make hubs for ATV wheels/tires or for anything else I want to mount to the rear. Heck, with these parts, I could make a single sided swing-arm with any width tire for a normal upright bicycle, possibly an extremely wide rear wheel setup to use an ATV tire on the world's fattest fat bike! This system is very flexible...... :mrgreen:

Matt
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Re: New recumbent QUAD build (OEM project)......

Post by Simpleton » Jun 29, 2017 12:39 pm

Is the motor mount titanium?

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Re: New recumbent QUAD build (OEM project)......

Post by recumpence » Feb 07, 2018 6:03 pm

Sorry for the crazy long time since posting any progress reports. Part of the delay is a huge OEM development project I am building and part of the delay was related to communication with the buyer of this quad (yes, it is sold :mrgreen:).

Anyway, here are some pictures.

The chain tensioner is all billet with ball bearing pivots. The drive unit is one of my DaVinci Drive units (the last brand new one I have in stock). The rear rack is aluminum box tube attached to a steel box tube sub frame. The whole assembly is easily removed. The nerf bars are box steel. They are powder coated black. The floor of the rear rack is 3mm thick g10.

I think the mechanical work is finished. I am down to the wiring at this point.

Matt
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