[gregoryda]

Figures, just ordered one of Doug’s Slick kits and now I found a used Mojo 40 locally. I’m picking it up next Monday. It’s set up for glow with an OS 46fx, but I’m going to convert it to electric, as I have been over the slimers foe years. I have a nib VH G32-800kv and a ZTX 85A ESC/5A BEC. What 4s battery mAH would be a good match, 2200,2500,3000,3300 or higher?

 

[Heinz57]

I like the 3300s best, but run 4000s occasionally and can’t tell any weight difference during flight. Nice Mojo

 

[gus]

I use 3700 to 4000

 

[gregoryda]

Thanks for the info. I guess I should weigh it before and after I remove the glow stuff and throttle servo. It looks like they dolled it up with some extra trim covering so that added some weight also. I was going to go with a 46 size motor, but had good luck in the past with the G32 on a VH Sabre ARF.

 

[gus]

G32 with a Xoar or Falcon 14x7 👍👍

 

[Straightup]

Mojo looks good

 

[sparkplug]

You dont sound happy,give that mojo some love,fly it hard while you build that slick. Might save your slick a few bumps while getting them fingers ready. Bet you ant got much money in that mojo,time to,how can you beat that. Best to have backup planes,never know when a ut oo turns to oh no,get the bag.

 

[WoodPilot]

Must be from a bro. I swear I’ve seen that jo before.

 

[gregoryda]

Not sure, he said he bought it at a swap meet in NY.

 

[gregoryda]

You dont sound happy,give that mojo some love,fly it hard while you build that slick. Might save your slick a few bumps while getting them fingers ready. Bet you ant got much money in that mojo,time to,how can you beat that. Best to have backup planes,never know when a ut oo turns to oh no,get the bag.

I’m very happy to have a Mojo again! I plan to wear it out, or the ground will . I still haven’t learned how to do rolling harriers and circles, so that’s on my radar. I had been looking for a new or used 40 size balsa profile for months and gave up. Then Soug decided to make some kits up and i I was happy to order one, I haven’t built a kit since a Sweet Stik and Super Sportster back in the 80’s, should be fun!

 

[gregoryda]

Well I went ahead and bought the Mojo 40 but the downside is that it was one of them with detachable wing kits (In hind sight you can make out the screw tabs on the back of the wing in the pic, I missed it). I’m assuming it will be a little weaker and heavier. I weighed it as is with the FX46 and empty fuel tank (minus fuel and Rx battery). It was around 3.8-4 lbs., so I’m guessing it would be about 4-1/2 lbs. or slightly more when flying. He said it hovered find, but was slow on pullout. He suggested an AX55 or Saito 72. Since I’m going to convert it to E-power, so you think the G32 will be enough power at these weights?

 

[WoodPilot]

Find a carbon fiber tube and use it instead and glue the wings onto the fuse. It’ll be just as strong and maybe an oz or two heavier if that.

 

[gregoryda]

I knew the carbon fiber would be stronger, is it lighter than aluminum? Just remove the fuse covering and epoxy the wings to it? Nothing else needed?

 

[WoodPilot]

Yea it’s lighter. And yes, I’d just mark where the wing butts up and cut just inside it. Slap some epoxy or gorilla glue on the roots and shove it together. Make sure to use something to hold the wings together while it dried like a couple bungee chords from tip to tip on top and bottom or maybe a ratchet strap if you’re careful, Or some good masking tape.
I did the same to my OMP slabs after their roots busted out. I never had a root rib or fuse fail even in iron man.

 

[gregoryda]

Good info., I’ll follow your advice! I appreciate it!

 

[Straightup]

Good advice. I've glued the wings permanently on my removable wing slabs also.

 

[gregoryda]

I have it all taken apart. The black aluminum tube is 0.505 OD x 24”. Any idea where to buy it and what wall thickness I should use?

 

[gregoryda]

I weighted parts for comparison and converting to e-power is 8oz. less weight.

FX46 w/prop and muffler. 18.4
8oz. Tank, fuel 9.0
Rx battery, Thr. servo, switch. 7.0
34.4 oz.

G32 Motor, Mount, prop 10.4
ESC 85A. 2.0
4s-3300 Lipo. 13.8
26.2 oz.

The aluminum tube 1/2”x24”. 1.8 oz.

Adding in epoxy for the gluing in the wings, I should still be at 4.5lbs. or a bit less. I’m not sure it’s worth replacing the tube with CF, since the aluminum tube only weighs 1.8 ozs.

What do you Bros think?

 

[WoodPilot]

That’s quite the weight difference! I had compared some before and I don’t think I ever saved that much. A lot of my jo40’s had thundertiger engines though so maybe they’re lighter than the old os fx’s.
goodwinds has cf tubes if I remember right.
the glue weight won’t be appreciable especially if you use gorilla glue. I’m sure it’s lighter than epoxy.
You NEED the cf tube because it’s not just about the weight but about strength. The aluminum WILL bend in a dork and you won’t be able to straiten or replace it.
that’s a fine AUW as well. It’ll fly great at 4.5-5lbs. Heck most of mine were probably 5.5lbs.

 

[gregoryda]

Found an old cf 1/2” tube a buddy had in his stash, he saved me $45. Glued the wings on today with the GG as suggested. Mounted the G32 and tested the cg with a Gens Ace 4s-3300 right behind the motor and I’m pretty tail heavy, about 6-6.5”. I have the motor at the rear of the cutout. I’m thinking I need to move it forward an inch or more. Any issues with mounting it further out inside the jaws? Right now the prop just clears the end of the fuse. Also, what brand of Lipos do you Bro’s like to use these days?