Mojo or Primo?
 

Hi,

Its the monsoon and we wont be flying till October. I want to build a profile 3D airplane to keep myself busy around the dle20. Would you suggest the Mojo or the Primo? I have been flying full fuse 3D airplanes a bit- UCD, Reactor 46, Reactor Bipe etc but have a lot to learn in 3D

Ameyam

RE: Mojo or Primo?
 

Of those two choices, a Primo would be slightly better as it handles a little extra weight better.
DEL-20 is really a 65 size profile motor but many have successfully put them on Primo and MoJo 60's.

RE: Mojo or Primo?
 

I have a RCGF 20cc on a Primo 55"ws. My throttle is very linear and it hovers at 1/4 throttle or less, literally. So I'm sure the DLE would be great. If ya want to see, there is a video of me doing a limbo contest. I'd have to find it.

RE: Mojo or Primo?
 

Fortunately, there is no wrong choice. The Mojo 60 and the Primo 60 are both great 3D planes that are a significant step up from the planes you have been flying.

If you already have a DLE 20, then then the Primo 60 would be the best choice.

But building a Primo 60 won't keep you busy until October. They build pretty quick.

Therefore you should buy and build both a Primo 60 and the Mojo 60. Building those two should keep you busy until about August at the latest, then you have to come up with something else to build to stretch it out to October.

RE: Mojo or Primo?
 

In either case, don't forget to modify the engine mount for the gas to fit and for strength.

RE: Mojo or Primo?
 

Hi,
I do have stuff to keep me busy till Oct. See the pic

I also have a us40+ to refurbrish.

I was told the primo is more aerobatic whereas the mono more stable? I do want to be able to fly some sports with it as well.

what mods do I need to make for gas?
Ameyam

RE: Mojo or Primo?
 

The Primo is very aerobatic and 3D worthy and on low rates will actually do some nice pattern.

The new motor mounts are a ply/balsa/ply sandwich with hardwood rails for the engine to mount in. You may need to widen the rails just a little. Much easier before it is glued up. It will be easy and you will like at the fuse on paper and be surprised at how fast and easy it goes together. As for strength, its plenty strong as-is. I have one with a YS115 and its plenty sturdy.

RE: Mojo or Primo?
 

It's true that the Mojo is more stable than the Primo. The Primo has a faster roll rate and overall has a quicker response to control movements than the Mojo. But the Mojo is still a lot more maneuverable than the UCD, Reactor 46, and Reactor Bipe.

There is no wrong choice, but the Primo will balance out better with the weight of the DLE 20 in the nose.



I know that some of the probros have already done this. Maybe they will chime in with an answer. If not, you might have to check on the probro site.

RE: Mojo or Primo?
 

Ok, I will get the airplanes and then look thru. Point is, the box will take atlease one month to come in by post. Lets see how it works out

Ameyam

RE: Mojo or Primo?
 

Are you going to order the two piece wing kit?

David

RE: Mojo or Primo?
 

yes

RE: Mojo or Primo?
 

My mentioning of the motor mount was not a downing of the design, it's a great design. Just that Paul did not design it for gas, which has a larger mount base. On mine I did not make it correct and had to pull it apart. The simple fix is to widen the mount beams for the DLE spacing, extend the beams further rearward, and make new beams that are wider. These little gas engines have a lot more torque than there nitro counter part. I have had all the Swanyhouse models but never could see the twist in the fuse I can get with the gasser. The wing kit is great, simple, and effective. As for advice the only other thing that jumps out at me would be that when one is epoxying the fuse tube in "Don't be lacking on the epoxy". I actually bought some Gel-Majik epoxy just to do the Primo's tube.

RE: Mojo or Primo?
 

Unless you have absolutely no way to transport a one piece Primo/Mojo, don't get the removable wings.

The extra structure of the removable wings adds weight and sacrifices strength.

RE: Mojo or Primo?
 

No way. I need removable wings. Just did the maths though. The Mojo is $110 + $50 kit + $60 shipping + 30% customs. Thats $220 + 30% + the monokote and building accessories. Thats atleast $ 320- 350 which is more expensive than getting a 20cc full fuse GW airplane locally (thats $300 landed). We are looking at getting some free plans laser cut and building our own profiles. Any suggestions?

Ameyam

RE: Mojo or Primo?
 

wow 30 % customs fee they are sticking it to ya man !!! that sucks

I had a Primo 40 and it was a great plane! Does some things that the Mojo won't do, or as well.

Just picked up a used Mojo .40. The fuse is fully sheeted. Down the road I may strip it and peel the fuse sheeting off but for now in just going to fly it the way it is. With alittle work I want to put an OS .61 fx on a pipe. Please tell me what you think. I'm a well experienced pilot and have this motor on hand. I don't have a .46 or .55 on hand. Will it stil fly fine. Not looking for speed just insane 3d.

Dave

The fully sheeted fuselage on that Mojo 40 defeated the whole purpose of the flexible tube in the fuselage. The tube lets the fuselage bend without breaking. The fully sheeted fuselage won't bend, it will break.......most likely at the trailing edge of the wing.........which is exactly what the tube is designed to prevent.

A 61 on a Mojo 40 is WAY too heavy for that plane.
Will it fly? Yes.
Will it fly well? No.
Will it 3D good with a 61? Absolutely not.

The extra weight of the 61 will kill the flight performance of the plane, and the extra weight in the nose will kill the 3D capabilities of the plane. Adding more weight to the tail to get it to balance correctly will further increase the weight of the plane without fixing the 3D capability. Plus the fully sheeted fuselage has already put the plane overweight.

A 55AX is about half a pound lighter than a 61, which is why the 55AX works so great on the "40" size 3D profile planes. A Mojo 40 with a 55AX weighs about 4.5 to 4.75 pounds, and flys great!

Do yourself a big favor. Strip the fuselage sheeting off first. Then remove any extra reinforcements that might have been added. And last but not least, get a 55AX for that Mojo 40. Use the 61 in another plane, or sell it to help finance a 55AX.

Want proof? Here's my Mojo 40 with a 55AX.
http://www.youtube.com/watch?v=gCda-xLW-Pw

Thank you very much. I will take your advice, strip down the plane and get a 55 AX For it. Rebirth in a hot cover scheme.
Dave....

I was thinking about a Primo 60 for a DLE 20. I have an OS 55AX and a DLE 20, but I really don't want to run the nitro anymore. I have gotten rid of almost all my nitro now and not even remotely interested in turning back and I want a profile. I have a plane waiting to be put together and I was looking at RedWingRC profile ARFs (I know build a primo - I get it but I could use an ARF too).


After reading this thread I am leaning to getting the Primo 60 and maybe also a RedWing 20cc profile for the interim. Any thoughts?

My Primo 60 has an OS 120AX with a BCP, and one of my friends has a similar size plane with the DLE 20. Based on how his DLE 20 runs, it would work just fine in a Primo 60. The DLE 20 doesn't have the power or the silky smooth throttling of the 120AX, but it will definitely get the job done.

Don't know anything about Redwing planes, so I won't comment on them.

let me answer your question about the Redwing 20cc plane. I have the yak profile, along with about 17 other planes.,including a Chinn yak,40 Primo, & a 60 size Mojo. Well, those planes and other are gathering dust! The plane flies great,the people at Redwing are great also The plane has has done everything I have asked of it, and it does it well. the only thing I added was to double the motor mount with more hardwood and coat the whole area with epoxy mixed with microballoons to strengthen the area. You can`t go wrong with this plane.

I know I am not the orginaly OP, yet I think this is great info. I have read a lot on the brotherhood profile site and various places. Maybe I will get me a Redwing 20cc to fly right away and also a Primo for a build :) Could be the best of both worlds.

Easy... Mojo65.

-Case

Primo! Removable wings! And a 20cc gas engine, all day long!!!!