Cheap aircraft are simply impossible? :(

Discussion in 'Hangar Flying' started by Inverted Vantage, Nov 15, 2009.

Help Support HomeBuiltAirplanes Forum by donating:

  1. Apr 6, 2019 #1241

    blane.c

    blane.c

    blane.c

    Well-Known Member HBA Supporter

    Joined:
    Jun 27, 2015
    Messages:
    2,873
    Likes Received:
    492
    Location:
    capital district NY
    So would it still be so appealing with fuselage "bubbles" around the seating area?
     
  2. Apr 6, 2019 #1242

    blane.c

    blane.c

    blane.c

    Well-Known Member HBA Supporter

    Joined:
    Jun 27, 2015
    Messages:
    2,873
    Likes Received:
    492
    Location:
    capital district NY
    A 7hp airplane?

    upload_2019-4-6_9-56-36.png
     
  3. Apr 6, 2019 #1243

    Little Scrapper

    Little Scrapper

    Little Scrapper

    Well-Known Member HBA Supporter

    Joined:
    Jan 3, 2014
    Messages:
    5,239
    Likes Received:
    3,145
    Location:
    Wisconsin
    I don't know. For me personally I'm a fan of extremely spartan and simple as it concerns this type of flying.
     
  4. Apr 6, 2019 #1244

    Toobuilder

    Toobuilder

    Toobuilder

    Well-Known Member

    Joined:
    Jan 20, 2010
    Messages:
    4,286
    Likes Received:
    3,026
    Location:
    Mojave, Ca
    Funny, 100 years ago people were trying to solve the high cost of flying with a "cheap airplane", but were shutdown by the relative low cost of existing aircraft.

    ...Just like today.
     
    Tiger Tim and Little Scrapper like this.
  5. Apr 6, 2019 #1245

    blane.c

    blane.c

    blane.c

    Well-Known Member HBA Supporter

    Joined:
    Jun 27, 2015
    Messages:
    2,873
    Likes Received:
    492
    Location:
    capital district NY
  6. Apr 6, 2019 #1246

    blane.c

    blane.c

    blane.c

    Well-Known Member HBA Supporter

    Joined:
    Jun 27, 2015
    Messages:
    2,873
    Likes Received:
    492
    Location:
    capital district NY
    The Parasol is much simpler.
    I wonder what the cubic inches of this engine is it is supposed to be 18hp variant?
     
  7. Apr 6, 2019 #1247

    blane.c

    blane.c

    blane.c

    Well-Known Member HBA Supporter

    Joined:
    Jun 27, 2015
    Messages:
    2,873
    Likes Received:
    492
    Location:
    capital district NY
    There are some sweet deals in the used airplane market for sure. At least they look like sweet deals. LOL.
     
  8. Apr 6, 2019 #1248

    Little Scrapper

    Little Scrapper

    Little Scrapper

    Well-Known Member HBA Supporter

    Joined:
    Jan 3, 2014
    Messages:
    5,239
    Likes Received:
    3,145
    Location:
    Wisconsin
    18 how is doable. Here's a Heath midwing on 40 hp. There's really nothing new in aviation for the most part. Ingenuity and effort are what's missing.

     
  9. Apr 6, 2019 #1249

    Bill-Higdon

    Bill-Higdon

    Bill-Higdon

    Well-Known Member

    Joined:
    Feb 7, 2011
    Messages:
    387
    Likes Received:
    119
    Location:
    Salem, Oregon, USA
  10. Apr 6, 2019 #1250

    TFF

    TFF

    TFF

    Well-Known Member

    Joined:
    Apr 28, 2010
    Messages:
    11,115
    Likes Received:
    3,011
    Location:
    Memphis, TN
    A thor v-2 is 1000 cc. Looks like it’s turning a 6 ft prop my guess at 1200 -1400 rpm. If you want to fly on 7 hp, you will need to turn that high pitched 6 ft prop the same. A 37 hp 1/2 VW is about the same size and needs to turn a 54” prop 3000 rpm to make its power. If you lug the 1/2 VW down to 1200 rpm with a big prop you are probably in that 10 hp range. If it does not overheat or toss a rod from the weight of the big prop. Straight up hp is not a good indication. Conditions the hp is delivered is important too.
     
    blane.c likes this.
  11. Apr 6, 2019 #1251

    blane.c

    blane.c

    blane.c

    Well-Known Member HBA Supporter

    Joined:
    Jun 27, 2015
    Messages:
    2,873
    Likes Received:
    492
    Location:
    capital district NY
    Yes as Pops pointed out quite a while back … cubic inches.
     
  12. Apr 7, 2019 #1252

    rtfm

    rtfm

    rtfm

    Well-Known Member

    Joined:
    Jan 3, 2008
    Messages:
    3,155
    Likes Received:
    558
    Location:
    Brisbane, Australia
  13. Apr 7, 2019 #1253

    TFF

    TFF

    TFF

    Well-Known Member

    Joined:
    Apr 28, 2010
    Messages:
    11,115
    Likes Received:
    3,011
    Location:
    Memphis, TN
    Well...
    I think lots of people think horsepower is thrust. What I think is also interesting is that although we measure horsepower the same, we do not use 100 year old dynos. Accuracy was all over the place then, if even tested.
    My guess is the Thor was allowed to spin faster to make the 18 hp. I don’t think they made an 18 hp engine. Motorcycles must have been pretty cheap used. Thor , making a lot of engines for others, must have transferred the engine technology to Henderson/Excelsior and Heath followed the light weight motorcycle engines with his modified 4, but they were 27 hp I think.
     
  14. Apr 7, 2019 #1254

    BJC

    BJC

    BJC

    Well-Known Member

    Joined:
    Oct 7, 2013
    Messages:
    8,872
    Likes Received:
    5,728
    Location:
    97FL, Florida, USA
    I’ve seen video of a glider towed aloft (in ground effect) by one horse.


    BJC
     
    MadRocketScientist likes this.
  15. Apr 7, 2019 #1255

    TFF

    TFF

    TFF

    Well-Known Member

    Joined:
    Apr 28, 2010
    Messages:
    11,115
    Likes Received:
    3,011
    Location:
    Memphis, TN
    The Heath Parasol and the Legal Eagle are almost the same size. It would not take much to turn a LE into a Heath clone if the styling is to one’s liking. The formula for this type of plane is pretty solid even after a hundred years.
     
    Little Scrapper likes this.
  16. Apr 7, 2019 #1256

    BBerson

    BBerson

    BBerson

    Well-Known Member HBA Supporter

    Joined:
    Dec 16, 2007
    Messages:
    11,405
    Likes Received:
    2,092
    Location:
    Port Townsend WA
  17. Apr 7, 2019 #1257

    Little Scrapper

    Little Scrapper

    Little Scrapper

    Well-Known Member HBA Supporter

    Joined:
    Jan 3, 2014
    Messages:
    5,239
    Likes Received:
    3,145
    Location:
    Wisconsin
    I'm watching the thread with interest. It's not done or flying so I'm just watching. It seems like a pretty cool airplane but it's not any cheaper than what's currently available in the market place. I might be missing something though?

    The Legal Eagle, Sky Pup and Minimax are pretty darn cheap, well known, proven and pretty simple to build. How is the Ranger idea different?
     
  18. Apr 7, 2019 #1258

    nerobro

    nerobro

    nerobro

    Well-Known Member

    Joined:
    Nov 6, 2011
    Messages:
    1,105
    Likes Received:
    311
    Location:
    Northern Illinois
    Professional Cyclists can do half a horsepower for ~the whole day~. Track cyclists, can do several horsepower for seconds, a couple horsepower for a minute, and a full horsepower for a few minutes. It's downright shocking.

    (Coming from a cyclist who can do 1/10 of a horsepower continuous...)

    To add somethign productive. A "really safe" airplane, can climb better than it's glide. I wonder what's the lowest horsepower we could get that happening with.
     
  19. Apr 7, 2019 #1259

    BBerson

    BBerson

    BBerson

    Well-Known Member HBA Supporter

    Joined:
    Dec 16, 2007
    Messages:
    11,405
    Likes Received:
    2,092
    Location:
    Port Townsend WA
    Well, depends on speed required. A human powered aircraft can fly on half horsepower with not much speed or climb ability.
    The Solar Challenger is more practical with two 3 horsepower motors and 40 mph top speed and ability to handle turbulence. https://en.m.wikipedia.org/wiki/MacCready_Solar_Challenger
    Might need help from DuPont to pay for it, however.
     
  20. Apr 7, 2019 #1260

    blane.c

    blane.c

    blane.c

    Well-Known Member HBA Supporter

    Joined:
    Jun 27, 2015
    Messages:
    2,873
    Likes Received:
    492
    Location:
    capital district NY
    When talking about hp for a cheap airplane it is as much about hp for weight for money as it is about hp. So put as much hp on as the design will carry and you can afford and if it doesn't work … oops!
     

Share This Page

arrow_white