Minimax Speedmax Flite
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- čas přidán 13. 09. 2024
- Minimax flight with shorter wings installed. Wingspan 5,6m chord 136-120cm. Controls are very responsive, landing in crosswind much easier, than with "normal" wings. Very cool, like simulator!
Полет с "speedmax" крыльями. Размах 5,6м хорда 136-120см. Очень отзывчивые контроли, посадка с боковым ветром гораздо приятнее из за хорошей отзывчивости педалей и отсутствия инерционных масс создаваеммых размахом крыла. Короче кайф, как симулятор!
Epic intro music
Great plane looks like a mini Cherokee
У меня сложилось впечатление, особенно вначале, что у вашего самолета размах крыла меньше, чем должно быть в оригинале. Так ли это?
Пару дней назад я поменял крылья на эти меньше, которые около 2 лет ждали своего часа, но из за кайфа, как летел самолет с оригинальными, не спешил менять. Да, эти на >1/3 меньше.
красиво...! очень.... короткое крыло - Ваша собственная разработка...? не вижу этот вариант на их сайте... как это влияет на climb и stall и MTOGW и тд и тп...?
Да, собств. р-ка, ошущения коротко уже написал в описании. По управлению очень удачная компоновка. И управл. по крену легкое (не скажешь по оригиналу) и с full flaps "на душе покой...", чего нельзя было сказать с ориг. крыльями. Да, я писал, что ориг. минимакс прекрасно летает со слабыми двиг-ми, но тут нужна чуть больше мощность.
Climb -5.5-6.5-7м/с в обеих вариантах,
MTOW- с мальенькими крыльями сам на 22кг легче, "грузоподемность" не пробовал, но хватает в обеих ситуациях, но с ориг. крылом и + 100кг не будет проблема.
v перед касанием с мал. крылом c full flaps 57км/ч. , c ориг. было 38-39км/ч. (посмотрите другие мои ролики). Stall speed будет примерно та же.
Simply awesome, and I really appreciated your link to the photos. Thanks!
I think the speed wing is totally the right idea for airplane, given how the aircraft has grown from the original slow, low powered, 1200 design. And I agree, the higher wing loading would make it a much more comfortable ride - sometimes flying in Canada’s BC mountain turbulence I got quite shaken up.
A couple more questions?
How did you design the control stick and aileron linkage for the solid ailerons?
And how did you design the reflex system for your flaps/aileron (flaperons)?
Did you also use a solid rod system for your elevator? And still cables on the rudder?
I notice that in the original minimax wings you had bell cranks on the top of the wings, about mid-way along their length. These seem not to be on your Speed Wings. How did you do your linkage in your speed wings?
It looks like your windscreen has a lower slope giving you a longer cockpit, less drag and more room for instruments. Looks better too than the original!
I am guessing you did not do your spar and wing loading test to destruction? To what G force did you take the testing?
Finally, what does your bird weigh all up?
I know, so many questions! I have flown lots of different recreational aircraft, but nothing - nothing - has been as much fun to fly as my Minimax. And so I am going to build a third one, probably based on the Vmax, incorporating your ideas, and others.
If you are interested, I can gift you with plans to build floats from our MukTuk design - www.ultralightfloats.com.
Great work! Thanks for your sharing.
Thanks!
About controls, I found some pictures, unuploaded.
failiem.lv/u/6vy6shch#/
About little nonsymetrical main triangular actuator, in such way I compensated wrong welded (twisted) ends of horizontal sagittal tube to get symetry. Behind this actuator is cube-shaped polyamide block with 2 perpendicular holes (20mm and 10mm over (continuation of horiz. tube) no photos)).To elevator goes 2pcs push-pull cables (as I know, mandatory in UK). About bell cranks, in Speed wing, they are also approx. in middle but in under side. About canopy, i had no original drawings (I have V-max) and like You thought, it is possible to do it different (better). I sit in my car, found the distance from my eyes to instr., and lift up upper side of panel to max point, to see spiner a little yet.
About wing loading test, original (reinforsed as V-max) wings -almost 4g, ( it seems quite doubtful in the middle of wing to add extra weight), speedwing (test spar fragments) 6+g.( I did not break them!)
EW with original wings 189kg, with speed wings -20kg.
Thank You for last offer, now I am building Jodel D18, and it takes also energy and time!
Now I am reading again Your article, and wondering - I answered You as I remembered, but nowhere can find it here! Yes, it is not good to consume so much alcochol! :-)
Rudder- as original- wires
Elevator- push-pull cables 2pcs.
Ailerons- in both cases with alu tubes and actuators (in speed wing below in appr. middle of the wing (try to attach link with photos)
failiem.lv/filebrowser#/2017-08-20_6vy6shch
Spar and wing loading test to destruction- I did it with experimental peaces of spars and I get 6+ g, and still didn't break them, but didn't tested complete wings, and avoiding overload them.
failiem.lv/filebrowser#/2014-09-28_zpfebzk;/view/Speedmax+042.jpg
With instr. layout (distance) I understood- orig. is not for me, sat in my car, measured distance fom eyes to instruments, and made the same- easy!
Weight- didn't put on weights, but each speedwing with struts is lighter appr. 10kg, now new instr panel is -2kg, so EW can be168kg
Dellirium continues... :-)
I would like to know the change in landing speed and cruise. Shorter wings means a higher wing loading. How is payload and performance affected?
Approach speed was 60km/h, now 90
Speed just before touchdown 40, now 65.
Stall speed was approx. same (38), now?
Vcruise was 90-100km/h at 4000rpm, now the same with same prop, but it's time to test a faster prop., engine runs lighter with these wings.
Payload is big enough in both cases.
Wing loading was 30kg/m^2, now approx 45-47.
PS. I have no so big experience with these wings, flying just 2. time :)
Thank you for your feedback. I sold my mini-max and I am now building a KR2S but I love the Mini-Max and how it flies. Best of luck with your airplane.
Great airplane! Love your workmanship and finish. and Instrumentation.
I especially am interested in your speed wing and how you built it. Is it the same airfoil section and constructioin layup, less two wing bays? Or did you use a completly different foil and wing structure?
And what engine did you use?
And What minimax model is the airframe otherwise - Eros?
I have built two minmaxs an Eros with 503 and a Highmax. Been flying lots of other stuff but decied to go build another Minimax cause they are simply the most fun to fly!
Wingspan 5,65m is determined as I used 2 pieces of plywood 1.22m in spars & nose covering instead of 3 in original wings.
60cm(fuselage)+2*240cm(wings)+2*12,5cm(wingtips)=565cm
Wing is trapezoidal, root chord is 136cm, tip chord is 120.
LE is 5cm V-shaped, TE 11cm to ensure right CG position. (28,5-29% on both wings).
Structure basically is same.
Airfoil ewerywhere is standart Clark-Y (11,7%), i choosed it because original wing attachment fits best with right angle of attack, and both theese airfoils are "generally similar", and will not matter on CG characteristics etc. Yes, i made a little washout 1.4 cm in wings .
failiem.lv/u/zpfebzk#/view/SpeedMAX+014.jpg
Spar load test (6G):
failiem.lv/u/zpfebzk#//view/Speedmax+042.jpg
Engine: Walter M202 (65hp)
Model: In documents it is V-MAX, (open cockpit , vw engine, reinforced orig. wing spars), because was made from such drawings and drwg. No. figures in Cert. of Registr. But there are lot of changings (another engine, selfdesigned enclosed cockpit, rigid (not cable) aileron controls, changings around instr. panel, etc).
About Speedwing, I can say just the best. Minimax is a little too slow...when You flying somewhere, and I tried to avoid to fly in sunny days, You feel very uncomfortable in turbulences. Now it is not a problem, it flies smooth. And in crosswind now is enough rudder at low speed before landing. (With orig. wings in these cases was much bigger chans to catch groundloop.)