BJMR Twin Lizzie

I really enjoyed the video Ken

fun stuff

What a nice flying little FF airplane Ken. You really have the timing and flight set-up right.

And Fred, I watched "The Polar Express" again last night. Kid has a P-38 model hanging from his bedroom ceiling. Gotta like the kid.

GOTTA LOOK FOR THAT

funny how the more I watch a series or movie I always SEE new things

That was really good , best i have seen it fly . It sure has a lot of left turn in the rudder and didn't seen to go as far away after power off . Nice !

The left turn is caused by the engine and not the rudder. The rudder is the opposite direction so when the power cuts it goes to the right. I can open up the spiral a bit using small rudder adjustments. However, this day I had the prop on correctly and what this does is pick the nose up high and kicks the aft end to the left harder. Keep in mind this is how the Dakota was designed to fly, tight circles to the left and comes out to the right. It was designed for schoolyard flying.

Thanks Ken that clears up some of my thoughts , It did just like it was designed then , Glad you could get it sorted out it looks good fling around all on its on .

Thanks for posting video Ken, amazing, perfect flights, getting me fired up. I can only hope mine flies that well. I have been very busy with life's responsibilities, not much time to post here but things should calm down soon, just wanted to check in and congratulate you on the FF's.

Fred, couldnt wait anymore, opened the package you sent. Was not at all what I expected. Everything I need to cover the Lizzie and more. You are truly an altruistic person, if everyone was like you in this world it would be a much better place! Thank you so much, you made my Christmas real.

I built the BMJR Sniffer. I covered it today. For some craaaaaaaazy reason, my son talked me into covering the plane with Polyspan. Reason being is that the Sniffer has a undercambered wing. If I did Monokote the underside, I would have to CA the Monokote to the ribs so that it would stay and not shrink off of them. I used the Mod Podge method and brushed a thin coat on all the ribs. Let it dry and then ironed on the Polyspan. This worked incredibly well. I had the wing covered within about 1.5 hours. I completed the fuse and managed to get 2 coats of dope on it as well. This was a good day to get this thing almost completed.

I've witnessed Fred's generosity on here over the past few years. It really is nice to see that. Nicely done Fred.

Ken, did you finish the Sniffer? I would like to see it.
I got a good start on the Lizzie over the last few days think Ill start a new thread, because Im going to have some questions when its time to cover it, hopefully you can help. Fred sent me several different materials and some tools, Ill post pics of that too. I only have experience with tissue.

For the most part, I did complete the Sniffer. The wing on the sniffer isn't a symmetrical airfoil. The bottom of the wing is undercambered. Against my better judgement, I used Polyspan. This is a synthetic that is stronger than silkspan. I used Mod Podge to adhere it to the frame. This is a glue like product similar to white glue but it's thick. I used a artist brush and applied a small bead to all the rib tops on the bottom. Let it dry and iron on the covering and it melts it right into the weave making a very tight bond.I applied two coats of dope to the covering but the weather took a wet nasty turn and I haven't been able to brush it on without it blushing due to the dampness.

The Polyspan is taking multiple coats of dope. I have about 6 coats on the wing now which are nitrate. I will switch to butyrate on the next couple. Once again, the cold means I need to really thin it and I keep running outside when I can. Quick slap on some dope and place it in my detached garage to gas off a bit. I then rescue the pieces from the cold and back into the house. In all this craziness, I had some Jap tissue which I started to cut some stars from. I really don't know what I was thinking as this is time consuming in itself. Dope the stars on and keep building coats. The fuse is done in Sig Lite Coat and it currently has 4 coats on it and it needs a additional over the yellow stripe I painted on.

         

              Debating on some stars on the fuse.



              Stab is in need of some blue stars. Rudder is in the process of being doped. The rudder is a part of the dethermalizer as it glues in between the two center ribs and the rubber band passes through a hole in the front of the rudder


     
               I've enjoyed building this and this plane is extremely light in fact too light in my honest opinion. I even opted for heavier sheeting throughout as this came with 1/32" and I switched to 1/16" I even beefed up the front with 1/4" ply F-1 vs the 1/16" ply that came with it not too mention other selected pieces to beef up the landing gear area

Awesome, going to be another beautiful model, cant wait to see it done and your flying vid. Hilarious that you need to keep running out to breath, thats some dedecation! Must have given you the idea for stars. Too light? Isnt supposed to "sniff" thermals?
Lizzie is coming along, missing some parts out of kit but so far Brian has been very responsive. I must say this kit is definatley more involved than the Dakota but Im enjoying it. I would be posting pics but Im having issues with phone. Thanks for the update Ken, keep us posted.

Was able to post pics via my wifes phone.
This model definately leaves gaps for interpretation on plan and instructions but it makes it interesting. Guess its things I should know but so far Ive figured it out it think. Still have some shaping to do. You can see some covering I got from Fred in the background, more to come on this later, Ill be ready to cover next week (going out of town this weekend). I also need to trade a new Pee Wee with throttle control for std pee wee that I want to use on this plan, guess Ill post that on here at some point.

Wow the covering you been struggling with Looks darn good to me shows the plane off , what's the W/S on that baby ? firstwordisee Your plane has famed out Nicely ! Looking forward to the covering .

Not really knowing what the plane was, I fear I sent the wrong stuff, hope Ken can suggest what to buy are use of what I sent

3 rolls standard new type ( less than 5 years old) MonoKote
Several sheets, maybe 8 or more, of Phil Cartier SLC cut by Phil and edge marked from Lil Hacker kits
2 Coverite Irons. Big one and small trim...but forgot to include sole temp gage
A heaterizer*. I sincerely hope Tracey reads and shares the instructions for


*Heaterizer is a very inexpensive small heat gun really intended for flow soldering. A little longer than the typical Batter Dremel tool

Much easier for me vs a normal heat gun for covering shrinking because of its light weight, and focused heat air

https://www.sparkfun.com/products/10326

Seeing the plane now I suspect the best covering is tissue or some version of "xxxx"span" and dope especially for the fuselage. I suspect with practice the SLC would work on the wing using 8 pieces....unfortunately a serious 2 person 4 hands job on a delicate wing

Thanks getback.
Fred I believe you are spot on. BJMR has had most success with tissue on this model finished with Rustoleum clear. Ill dope frame. I used EZE dope on the Dakota and the stuff works pretty good despite some of the comments I read, I couldnt find anything to complain about. No smell, easy cleanup, dries quick. Good call on the wing it is very delicate. I ordered some Jap. tissue this morning. I'm very eager to try the items you sent me though so I guess that means another model is going to be needed. Thanks for keeping me locked in!

SLC is a good covering. Phil can no longer obtain what you sent Fred. He now provides a thicker mil version. I haven't seen Phil in several months as he was having some health issues but now seems to be over that. Phil provided me with some of the last long length rolls of SLC he had. The Lil Hacker kit was nice because he gave way more than needed to cover and if you elected to not use it, you had enough for a larger plane. I'm not a fan of silkspan and Polyspan for that matter, it rips and tears and your screwed.
However, what many have been doing was to adhere the Polyspan and then iron SLC over it. It's a lot of work double covering but there really isn't that much of a weight penalty and the SLC is quite strong. It also makes everything under the SLC shine very nicely including the raw Polyspan. I probably now have 8 coats of dope on my wing and this takes nearly 45 min to do each time. I can't say enough about iron on covering, it works great and despite what many think, it works great on 1/2A's and freeflight models.

SLC is a good covering. Phil can no longer obtain what you sent Fred. He now provides a thicker mil version. I haven't seen Phil in several months as he was having some health issues but now seems to be over that. Phil provided me with some of the last long length rolls of SLC he had. The Lil Hacker kit was nice because he gave way more than needed to cover and if you elected to not use it, you had enough for a larger plane. I'm not a fan of silkspan and Polyspan for that matter, it rips and tears and your screwed.
However, what many have been doing was to adhere the Polyspan and then iron SLC over it. It's a lot of work double covering but there really isn't that much of a weight penalty and the SLC is quite strong. It also makes everything under the SLC shine very nicely including the raw Polyspan. I probably now have 8 coats of dope on my wing and this takes nearly 45 min to do each time. I can't say enough about iron on covering, it works great and despite what many think, it works great on 1/2A's and freeflight models.

Tissue finally came yesterday so covered the wing tonight. Experimenting with all kinds of methods from what I have learned here. Purple glue stick, alcohol, EZE dope, water, Jap. tissue. So far its going smoothly, and I am happy.