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BVM Composite Bandit Build Thread. Yes from 1998.

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BVM Composite Bandit Build Thread. Yes from 1998.

Old 03-01-2018, 11:36 AM
  #126  
ravill
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Originally Posted by roger.alli View Post
When are you ordering that Super Bandit Raff ?
You know it Roger!

I want to do it so bad too....

Its the only "modern" bandit I've not built or flown.

And those intakes look great! I can practically smell the dust man!
Old 03-03-2018, 09:43 AM
  #127  
essyou35
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Quick update no pics.

Well the deed is done, the inlets are drying now. The left inlet didnt fit perfect like the right intake, so I know there is probably a little bit of crickedness to them. I spend hours trying to figure it out. But in the air it wont matter IMO. Ive been beating up arfs for a long time with much worse.

I sanded down the bypass extension 2", maybe that wasnt perfectly flush either. There is a lot of room for cumulative error in this process, some error cancels out others and some adds up. Not to mention that since the bypass just slips over the inlets, you can get a lot of play right there.

So it is what it is!

Now that the inlets are drying, things are getting real now. Ive got the wings completed sans gluing the aileron hinges. I did quite a bit of work on the tail as well including the vert fin. I got the rudder servo in route so that will be my next step.
My goal is at the end of this month, to have it into "Arf" status without paint. If I can do that, then it has a good chance being flown this summer.\
\
We'll be talking about paint shortly. Ill need some input.
Old 03-04-2018, 08:53 PM
  #128  
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Main formers are drying, got a strip of hysol on the ducting too. Once dry Ill remove wings and add some more hysol to the edge of the formers, was worried about gluing wings on.
I need to cut out the air brake next.

The fused on this sure has a lot of cutouts on it.

Someday Ill clean up my shop, but with the mess Im making building this Im not sure there would be a point!
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Old 03-06-2018, 02:51 PM
  #129  
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Looking great..

*** My personal Opinion*** The Air-brake is kind of an option..
I did not install one on my Balsa Bandit which was very light and certainly did not need it.
I did go to the effort of installing the air-brake on my Super Bandit, however I rarely use it. The big Bandit flaps, (when set at 45deg) are very effective.
Fitting the air-brake is a lot of additional work.
The BARFs have never needed one.
Old 03-06-2018, 06:11 PM
  #130  
essyou35
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Thanks for that great advice. I didnt know the arf doesnt have it. I agree I will leave it out. I use flaps and crow all the time and have great luck with that! Saved me a bunch of work!!
Old 03-07-2018, 11:16 AM
  #131  
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I cant argue with the lack of an airbrake on the ARF.

In my experience it has a lot to do with the turbine you use. Anything over a P-120 (and more residual thrust), you can use the extra drag to slow down. Crow does not work as well on a heavy plane like this will be (it will be a few pounds heaver than a bandit ARF). And I think the ARF is rated to 90 newtons (!) anyway I know guys have put everything up to P-160s in ARFs, but beware you will have to slow them down somehow.

Have you fit the hatches yet?
Old 03-07-2018, 11:31 AM
  #132  
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I had the canopy fitted but didnt like it I am going to redo it. I decided to wait until I get the formers in place so I dont warp the fuse trying to the canopy and hatch to fit.

Is the same true about the NACA duct the have in front of the vert fin, is it really needed? I am not using the supplied pipe I had BVM make me a new one.

Last edited by essyou35; 03-08-2018 at 10:16 AM.
Old 03-07-2018, 11:59 AM
  #133  
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I put them in my classic bandits but not in the supers, but the supers have a different double walled pipe so maybe they dont need them, I dont know

IMHO, you have to be careful on the ground, that is where the tail gets to hottest. The proper geometry at the exhaust cause the suction that cools the plane on the ground. That is the most important this , get the double wall pipe right, and the relationship with the aft FG nozzle. None of this is like the old kit you have.

You can always add the vents later if it gets hot, I strongly advise flying it in primer (at least that is what I do) in order to get things like this figured out before paint.
Old 03-07-2018, 01:10 PM
  #134  
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I do love the airbrake on bandits. But all three of my BARF's never had them and I had Titan's in them (p160). IMveryHO, a 160N engine is a minimum in a bandit!!

I use crow in my BARF right now. I'm a crow believer pretty much all around for sport jets.
Old 03-07-2018, 02:22 PM
  #135  
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I have a new double walled pipe, I wasnt going to mess with what came with the kit. None of my other jets have a vent like that but they also dont have a bypass. Ill add it in.

I used some bvm pinhole filler for the first time today, man that stuff stinks bad. Even after dry and I wipe it off the part is still spittin out fumes. I cut out the splitter plates and glassed them, thought Id give it a try for weave filling. Jury still out, it leaves a rubbery feeling on the part and once again IT STINKS!
Old 03-07-2018, 02:30 PM
  #136  
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I'm pretty sure the NASA duct is not needed, especially if you are using a double wall pipe. Again it s a lot of work to install especially if you wan to make a really neat job of it. Some Bandits don't even have the thermal blankets installed in the tail section.

Early turbines had a lot of residue thrust, which is probably why BV designed the air -brake..

I do not use Crow.. Flaps @ 45 deg works for me. Ravill knows Bandits though, so I wont get into this argument with him.
Old 03-08-2018, 06:26 AM
  #137  
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These are the formers for the horizontal stabs, these brackets attach to them, and there is a ply doubler that joins them together. Are these good to go? I noticed on some of the newer models these are carbon fiber, should I do anything to them such as cut new ones and double them up or make them from thicker ply? The tail section they glue into has CF reinforcement, but strange these formers take all the force of the tail, I figured they would be thicker all across. At the joint they will be 1/4" thick but the brackes still only hold onto 1/16" wood.

I think this is my next step but will check in the manual, still need to install vert fin former and the former that the bypass goes through, so Ill check I wont make one part harder then it needs to be by doing them out of order.
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Old 03-08-2018, 02:06 PM
  #138  
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I am pretty confident that here is a CF former to support the stabs.. Check the plans and manual.
Old 03-08-2018, 04:37 PM
  #139  
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Certainly, none of that bandits I've ever flown have ever "needed" crow. The jet that has impressed me the most with slow flight is a bandit!

Bandits are near and dear to my heart!

My Super Balsa Bandit had a carbon fiber reinforced former in the stabs.
Old 03-08-2018, 06:12 PM
  #140  
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Well looking at the plans, the doubler is appears to be 5ply. I found the wood in the same bag as the formers. I wonder if the former will get in the way if i cut another one out and had them doubled up, and then using the doubler?
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Old 03-08-2018, 09:38 PM
  #141  
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I am not 100% sure, but if the super bandit aluminum fittings will fit here I would swap over to them. Unless you don't ever plan to take the stabs off, this early bandit attachment method is a real b**** to use.

I can't comment on the plywood, I think the stock system was strong enough. The super bandit just simplified the whole thing
Old 03-15-2018, 08:26 PM
  #142  
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I am very frusterated with the horiz. stab former halfs. The rear fuse is so weak that it deforms very easily and I have no idea how they expected it to hold shape while trying to get this mess to fit. If it had a former to hold the shape, then I can mess with the stabs that would be much better.

Its just impossible to keep the fuse from deforming. I need 7 hands for this part. Any tips?

I tried this: I put tape on the stabs and the fuse, ligned them up against the molding (not space) and put ca on the tape effectivly taking them to the fuse.

However in this case, the formers do not want to lign up to eachother to be glued together with the doubler. If I force them with a clamp, the fuse deforms.

Edit: Even the weight of the clamp is enough to deform the rear!

Bed time.

Without the tape, with the formers lined up against the doubler, the left stab gets a nasty gap up front.
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Old 11-13-2018, 11:06 AM
  #143  
essyou35
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IF anyone is wondering, I started working on this again, may have a couple more questions. I installed my own sprinkler system, rebuilt my old motorcycle, bought a new motorcycle, wife learned to ride, etc.. So didn't touch this thing for like 7 months!
Old 10-13-2020, 12:37 PM
  #144  
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Default Old bandit tailpipe

How’s the build going??

If you still have the original tailpipe I may be interested in purchasing

Message me if interested

thank you!
Old 05-04-2021, 11:16 AM
  #145  
essyou35
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Originally Posted by Turbine guy1 View Post
How’s the build going??

If you still have the original tailpipe I may be interested in purchasing

Message me if interested

thank you!
I took a 2 year break from RC stuff, I rebuilt my 1973 honda cl350 and got back into that type of stuff, then covid.. So starting to work again this spring.


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Old 05-04-2021, 05:13 PM
  #146  
Ad Clark III
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Your bike looks awesome. Now get back on that Bandit and lets see some pics. I just got done with an overhaul on my old Composite Bandit myself. I "remaidened" it at Tucson jets this year. It flew great, I kind of forgot how small it is by todays standards.

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