230702 Douglas XB 42 Minute Model Build and Flights
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- เผยแพร่เมื่อ 12 ก.ย. 2024
- Build and flight trimming summary for a 10.5" wingspan rubber-powered XB-42 Mixmaster. Built from a plan by H.K. Weiss, originally published in the August 1946 issue of Model Airplane News magazine. Weiss did a series of small "Minute Models" in M.A.N. in the late 1930s and 1940s, this is the second of them I've built. This one was very difficult to trim - I eventually got it to fly after narrowing down the prop blades. Build thread available at: www.rcgroups.c....
Learning to fly such a small model with a pusher propeller on the tail is WORLD CLASS and exciting to watch.
Thank-you, for taking time out to answer my question. I have another if you do not mind. I built a Gulliow’ 17” Hell Cat. The plane glides well. I put on a bigger propellor a 6” inch instead of 5”. The plane flies well but at the end it pitches up like it is tail heavy. I was hoping for some advice on what is going on with the plane.
@@stephengould9385 The rubber often bunches up in the rear of the fuselage when it runs off. This should therefore be braided with a few turns more.😉
thanks
Congratulations. You worked hard enough and deserve to see it fly.
flight trimming is challenging !
I scratch built a T tailed piper lance , adjusted cg, aoi, and it flew perfect on launch….
except the glide was upside down, every time🤣
Wow - great persistence. That's one weird-flying little machine!
That has to be the cutest free flight model i've ever seen
The lovely Mixmaster! Thanks for the upload!!
Holy Cow, Mike! Fantastic. I'd say you pretty much nailed it. I was wondering if the prop was a bit much as it appeared to be "the tail wagging the dog"! Fun to watch you tweak and get some great flights. I'd like to try that one maybe twice as big. Maybe easier to trim? Thanks for posting. -Dan
What a wonderful hobby!
Beautiful little aircraft you have there. Glad to see you trim out the flight characteristics.
I wonder if landing gear would give it a little more "pendulum stability"?
Quite a trimming AND building challenge. The overhead zoom in the last video was worth the wait!
What a absolutely beautiful airplane
This a plane I would look with awe but would never try to build
And you actually built it and have it flying wonderfully
I thought some plans and articles were just for reading dreaming and taking up space
You prove me wrong
Beautiful Plane. Great Job!
Mike, I bet you are the only one to both build and fly that from those plans. Just the struggle to trim it sort of says that Weiss designed it but never really built let alone flew it. In all the old model mags I have never seen a picture of one either and such a cool looking plane would not go noticed. Congratulations on finally properly putting this into the history of free flight scale. Great job.
Thanks Tom! There's been at least one other build in the "modern" era: www.zininmodelvliegen.nl/schaal/mixmaster-en.html?fbclid=IwAR1UekFLCO8l6E31Adx-W-38UoCeFdme1SmHSCgEh5VkFD7go2mxYDqwp38. I need to see if I can search up the SFA Weiss cookup he mentions. I still have the Mauboussin, Cub and Mustang to do in the Weiss sub-peanut series, may have to do the Cub next just to preserve my sanity...
Wow ! It flew ! Congrats
Never in the field of aeromodelling flight, have so many seen so little an aeroplane fly so batshit crazily! 😂
Congratulations, you deserve a medal for your perseverance.
Pretty cool plane, the Mixmaster. Not surprised you had instability issues. The actual airplane also suffered from similar things. They had counter rotating props on that one, might have helped your model from turning. 😊 It was a fast bomber 430 mph so not surprisingly. It likes to fly fast. Before the pilots could eject, They had to cut loose the propellers otherwise the pilots would be mixmastered. 😮
That'd be a fun challenge to build a counter-rotating gearbox small and light enough to go in this model...
Challenging indeed. Your persistence paid off. My BD-5 peanut benefited from a higher aspect ratio prop, so maybe there's something worth noting here. 🤔
Amazing success. Congratulations for the beautiful work and perseverance in the trimming stage.
Beautiful little plane. Persistence paid off. Nicely done!
Maybe put some gurney flaps on the stab and wing. It turns to the right because the torque is around the tail when you have a tail prop. As opposed the left hand torque induced turn that you get with a nose prop.
wow amazing work
Well done!
Very cool crazy pilot.
Thank you for sharing my favorite xb42 video.
bravo!
So cool!
heres a cool one, saab j21.
Awesome
You worked for that one.
I was immediately confused by the propellor shape. Shouldn't the leading edge be straight(ish) and the trailing edge be the elliptical one, as opposed to the way you shaped it in reverse? Never seen a prop configured such.
Hello Mr Kelly, can you give us some tips on how to make canopies with the "push through" method? I understand the basics: make a form and cut a hole to match on (balsa?) wood... but... Thanks!
Not much more to it than that. Tape a piece of clear plastic sheet over the hole using high-temperature duct sealing tape, heat the plastic sheet with a heat gun until the plastic sags, then push the mold against the heated plastic, drawing the plastic through the hole and against the mold. .005-.015 thickness for the plastic sheet. If the plastic turns milky when heated it's not the right kind of plastic. Hope this helps...
@@michaelkelly7338 Thanks!
contra rotating prop? you must've had some bad thoughts.
what do you cover your tissue paper with so it does not wrinkle?
The tissue was adhered with UHU glue stick. Once that dried I sprayed the model with a light mist of 50/50 water and rubbing alcohol to shrink the tissue. After shrinking the tissue was sealed with light coats of Krylon Satin Crystal Clear spray lacquer.
Thank-you, for taking time out to answer my question. I have another if you do not mind. I built a Gulliow’ 17” Hell Cat. The plane glides well. I put on a bigger propellor a 6” inch instead of 5”. The plane flies well but at the end it pitches up like it is tail heavy. I was hoping for some advice on what is going on with the plane.@@michaelkelly7338
Does it glide OK? Just pitches up when the rubber motor runs out?@@stephengould9385
It glider great just under power - thanks for your time@@michaelkelly7338
Possibly one of the more (maybe the most) challenging FF rubber models. Rear thrust, cruciform tail surfaces all ahead of the thrust, small wing and the tiny size of the thing to begin with make this model nothing but capital P and that rhymes with T and that stands for Trouble.
Small models do not so much fly as they kind of flit about like a drunken bee. A terrible FF design unless the challenge to overcome it is the point of the thing as it appears to be
I'd say that you have an overdose of patience, and/or are a masochist.
BTW, small models are crap flyers because of many things even when the wing-loading is low, which it rarely is. These include tiny Reynolds Numbers, and super close and super-sensitive CG to CL distances. In a model this small, if these are off by even 1/8th of an inch, no can fly. There's more, but those are enough to cause what you went through with such results as you got.
At best, models like this one will fly like fast crap, relatively speaking.
Of course, all that I just wrote goes right out the window regarding those incredibly tiny, smooth flying E/P, R/C indoor scale models. I suspect that their extremely low weight, and the R/C component are what gives them their amazing performance. Either that or magic, which just might be the case.
Back to that nice Wakefield or P-30, eh?
not bad