Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Page 7 of 16 FirstFirst ... 56789 ... LastLast
Results 151 to 175 of 388

  1. #151

    Join Date
    Jan 2002
    Location
    Ringgold, GA
    Posts
    11,482
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    ORIGINAL: NM2K


    ORIGINAL: jeffp51

    Stump pulling is what I have in mind for mine. I have 936 sq. in. of scratch built biplane that I hope the .65 sportster will pull around. I don't need speed, but I hope it will fly a plane at around 7 lbs. Other than the 12x6, what does everyone prop the engine with?


    I have flown the K&B .65 Sportster swinging an 11x7 on a Sig Senior Kadet that belonged to a friend and it handled that seven pound model with ease. I also flew the same engine/model combo while swinging both a 13x6 and a 14x6 props. The latter two props were good also and they flew the model in markedly different fashion than the 11x7.

    The original muffler for the Sportster series of engines were ''tuned'' a bit and optimized to produce a bit of a power boost while quieting the exhaust note. I forget now if they were tuned to out perform K&B's .61 muffler, or if they were providing a bit more power than open exhaust. It's been too many years to be sure for this old brain.


    Ed Cregger
    The K&B .65 Sportster will handle a 14x6 and even a 15x4 without a problem, once broken-in thoroughly. Before break-in, the engine may overheat one the larger diameter props. One of the reasons that this engine handles such a wide variety of props is because its tuning is not particnularly sharp at any point of the rpm range.


    Ed Cregger
    \"Practice makes prefect\"

    Saito Club Member #52

  2. #152
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Well I got the $26 Sportster 45 in the mail today.

    I'll call this one Sandy because it's full of sand. Grrrrr

    On the up side there is no burnt on castor oil. Ofcorse this means fuel with no castor oil was used in it. Grrrrr

    I'll have to take it apart and clean it. I'm thinking a 95% chance of scored piston on this engine.

    Can't wait to get it on the test stand and see how close to .9 HP I can get. I'm thinking 11,500 RPM with a 10x6.

    May have to stick with NIB engines in the future.



    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Bz77792.jpg 
Views:	4 
Size:	119.5 KB 
ID:	1769888   Click image for larger version. 

Name:	Ni24590.jpg 
Views:	4 
Size:	58.9 KB 
ID:	1769889   Click image for larger version. 

Name:	Bg94127.jpg 
Views:	4 
Size:	111.2 KB 
ID:	1769890  

  3. #153
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club


    Opps almost forgot.

    Don't you guys just love when a fellow modeler breaks out
    the hand drill and a gouges out some big ol' holes so the bolts
    that happened to be laying around can be used. Rather than
    driving down to the hardware store and picking up some bolts
    that perfectly fit the bolt holes in the motor's mounting beams.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Rp44127.jpg 
Views:	5 
Size:	75.5 KB 
ID:	1769903  

  4. #154
    earlwb's Avatar
    Join Date
    Aug 2009
    Location
    Grapevine, TX
    Posts
    5,459
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    It could be worse.  Fortunately, if they didn't run the engine with the sand in it, it will be a lot easier to get out as you don't have ball bearings to clean out too.

    If a muffler doesn't fit, make it fit.


    Creative head gasket replacement, several layers of aluminum foil, and the engine didn't even need it.


    Club Saito #722, Sig Kadet Brotherhood #80, GlowHead Brotherhood #14,
    AMA # 928076

  5. #155

    Join Date
    Jul 2008
    Location
    Kansas City, MO
    Posts
    27
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Man that poor old FOX should be laid to rest. yeah Amish, hope that sand is Not too much of a problem.

  6. #156
    earlwb's Avatar
    Join Date
    Aug 2009
    Location
    Grapevine, TX
    Posts
    5,459
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Yeah I used to really hate having a engine/plane dive into a sand pile or anything like that. It was nearly impossible to get the sand out of the ball bearings. It was much easier to install new bearings, as I always had to pull the bearings out to clean them out good anyway.

    Club Saito #722, Sig Kadet Brotherhood #80, GlowHead Brotherhood #14,
    AMA # 928076

  7. #157
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Broke in a NIB .65 yesterday. I primed the engine and went to flip it a few times with the chicken stick but the engine started up on the first flip the first time it was ever ran. This was a joy after the bulky Super Tigre G-51 that I was breaking in last weekend.


    The .65 ran well with a 11x6 wood two blade. I then moved to a MAS 11x7 3-blade and it did great. The 12x8 3-blade bogged down the engine.

  8. #158
    Charlie P.'s Avatar
    Join Date
    Feb 2003
    Location
    Port Crane, NY
    Posts
    4,869
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club


    ORIGINAL: AmishWarlord


    Opps almost forgot.

    Don't you guys just love when a fellow modeler breaks out
    the hand drill and a gouges out some big ol' holes so the bolts
    that happened to be laying around can be used. Rather than
    driving down to the hardware store and picking up some bolts
    that perfectly fit the bolt holes in the motor's mounting beams.
    I have "rebushed" a couple like that with paste wax on the proper bolts (or appropriate sizedmusic wire if fully threaded bolts were tobe used)and J-B Weld.
    Charlie P. (NY) "Gravity is weak but persistant".

    AMA 747089/IMAA 30723

  9. #159
    Moderator blw's Avatar
    Join Date
    Mar 2004
    Location
    Opelika, AL
    Posts
    8,394
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    I have a friend who uses anything lying around, like wood screws. I've seen one of his engines with 4 different type of screws....on a Golden Knight that had screwdriver gouges. Yikes.
    The ultimate responsibility of pilots is to fulfill the dreams of the countless millions who can only stare skyward...and wish.

    "It's a new day for Auburn" - Gus Malzahn

  10. #160

    Join Date
    Jul 2008
    Location
    Kansas City, MO
    Posts
    27
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Ooh, Yeah I bought a K&B 28 off Ebay that turned out to have 4 different types of screws, including a tapered head wood screw in the head. I was really mad till I looked at the single photo in the add. Everything was in the photo, I was in a hurry to get a good deal. The seller was going to take it back, but I decided to send it back to MECOA for a tradein. It had so many issues that it needed to be melted down instead of repaired . I think I had $ 15 in it with shipping. So now I have a NIB 28.

  11. #161
    1QwkSport2.5r's Avatar
    Join Date
    Oct 2006
    Location
    Cottage Grove, MN
    Posts
    5,196
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club


    ORIGINAL: AmishWarlord

    Broke in a NIB .65 yesterday. I primed the engine and went to flip it a few times with the chicken stick but the engine started up on the first flip the first time it was ever ran. This was a joy after the bulky Super Tigre G-51 that I was breaking in last weekend.


    The .65 ran well with a 11x6 wood two blade. I then moved to a MAS 11x7 3-blade and it did great. The 12x8 3-blade bogged down the engine.
    My .65 started like that too... But mine would *not* turn a big prop for a gallon of fuel or more. All castor. It would get hot and quit. I ran a MAS 11x7 for a gallon on my test stand and then another gallon on an airboat. I ran a 12x6 for quite awhile.
    GlowHead Brotherhood #3
    Using Dynamite, Enya, Fox, Jett, K&B, SH, Super Tigre, Thunder Tiger, and Traxxas engines.


  12. #162
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Yeah the .65 was well on the way to getting hot but I stopped before then,
    but not in time to save my Hobby King onboard glow system's glowpug connector.
    The boot got soft and broke. The test stand has proved to be to harsh an environment
    for the little on board glow systems so I'm going to make up a simple Du-Bro clip and AA
    battery pack set up.

  13. #163
    1QwkSport2.5r's Avatar
    Join Date
    Oct 2006
    Location
    Cottage Grove, MN
    Posts
    5,196
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club


    ORIGINAL: AmishWarlord

    Yeah the .65 was well on the way to getting hot but I stopped before then,
    but not in time to save my Hobby King onboard glow system's glowpug connector.
    The boot got soft and broke. The test stand has proved to be to harsh an environment
    for the little on board glow systems so I'm going to make up a simple Du-Bro clip and AA
    battery pack set up.
    I don't run mine so rich I need to leave glow hooked up. I got mine started, went WOT and richened as far as I could go without it quitting. I use a regular NiCd driver most of the time.

    My 65 likes a hot plug and very little nitro. It handles 10% okay but 15% was too much. The 65 has high compression and a very short blowdown period so it should't take much nitro to get it to run well. They just need lots of time to break in. Lots of self machining going on in one of these.
    GlowHead Brotherhood #3
    Using Dynamite, Enya, Fox, Jett, K&B, SH, Super Tigre, Thunder Tiger, and Traxxas engines.


  14. #164
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Got in another .45 in the mail yesterday.

    This one has a really large head on it. It has
    deep cooling fins and a silver metal draw clamp
    on the carburetor. The prop washer is black steel also.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Jh14624.jpg 
Views:	5 
Size:	121.9 KB 
ID:	1771991   Click image for larger version. 

Name:	Qo40726.jpg 
Views:	4 
Size:	149.4 KB 
ID:	1771992   Click image for larger version. 

Name:	Mh20385.jpg 
Views:	3 
Size:	163.5 KB 
ID:	1771993  

  15. #165
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Cleaned up the sandy .45 and test ran it this morning.

    I used a MAS 10x7 3-blade prop

    Sig 100% castor 25% oil 5% nitro fuel

    68° Morning temp
    66% Humidity
    730 Feet elevation

    10,600 Max RPM
    4.28 Pounds of thrust
    70.2 MPH EFS
    .792 HP
    582 Watts
    198° Head temp





  16. #166
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Put a MAS 10x6 wood 2-blade on the sandy .45 this morning.
    Pretty dismal performance.

    68° Morning temp
    65% Humidity
    189° Head temp


    10x6 MAS wood 2-blade
    10,000 Max RPM
    2.72 Pounds of thurst
    56.8 MPH
    .4 HP
    299 Watts

    You can really see how much better the 10x7 3-blade did on this engine.
    Very strang how there was a drop in RPM. I'd have thought it would have went up to 12,000 RPM.

  17. #167
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Ran a MAS 3-blade 11X7 on the sandy .45 just now.

    I got 9,600 RPM

    5.1 pounds of thrust
    63.8 MPH
    .86 HP
    634 Watts


    For fun I tried the 12X8 MAS 3-blade on it.

    6,400 RPM
    3.2 pounds of thrust
    48.4 MPH
    .41 HP
    303 Watts


    So looks like the MAS 11x7 is the way to go for this engine.


  18. #168
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Tested out the .28 on a few props.


    9x4 MAS nylon 2-blade
    14,500 RPM
    5.17 Thrust
    54.9 MPH
    .76 HP
    558 Watts
    "High heat build up" "red line"


    9x5 MAS nylon 2-blade "Best Prop"
    12,600 RPM
    2.79 Thrust
    59.6 MPH
    .44 HP
    327 Watts

    8x6 Graupner 3-blade
    11,400 RPM
    1.99 Thrust
    64.7 MPH
    .34 HP
    254 Watts

    9x7 Graupner 3-blade
    8,100 RPM
    1.61 Thrust
    53.6 MPH
    .23 HP
    170 Watts

    So for this engine I'm going to use the 9x5 2-blade
    At 2.79 pounts of thrust works out to a plane of 390²" wing area.











  19. #169

    Join Date
    Jan 2003
    Location
    Ithaca, NY
    Posts
    2,634
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Just curious...the .20 works so well with oversize props, do you know if the .28 will tolerate oversize props too? My .20 ran beautifully on a 12x4. Certainly not for maximum power, but useful for some scale types, or old timers.

    It looks like you got a big drop in power when you went to the Graupner 9x7, so maybe not.

    Jim

  20. #170
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    That 9x7 Graupner sounded great.
    I just knew from the sound and propwash that it was putting out some real power.
    When I ran the numbers it turned out not to be doing much at all.



  21. #171

    Join Date
    Feb 2007
    Location
    joutseno, FINLAND
    Posts
    145
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    iuse .28 engine apc 9x6 prop.

  22. #172
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Wow on sale for only $47.60!!!

    What an amazing price for an old, oxidized, gummed up engine that's only missing a glow plug, muffler, shim, and prop driver.

    "Description

    KB A 65 with Good Compression - well lubed - carb moves freely! RC Plane Engine

    For RC use/Collectors use"

    This means it has good compression when the motor is full of oil "well lubed"
    It's amazing that the crab moves being in such bad shape!!!
    Yes what RC engine collector wouldn't want a K&B Sportster, much less a used, dirty one that is missing parts.

    http://www.ebay.com/itm/K-B-KB-A-65-...item20c6f0aa5f


    I'm thinking you guys should pass on this engine.


    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Xv64490.jpg 
Views:	5 
Size:	47.8 KB 
ID:	1774926   Click image for larger version. 

Name:	Pn36617.jpg 
Views:	4 
Size:	55.6 KB 
ID:	1774927  

  23. #173
    earlwb's Avatar
    Join Date
    Aug 2009
    Location
    Grapevine, TX
    Posts
    5,459
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    Not a good deal with the price at $68, it wasn;t $47 like you stated. I would rather buy a new one or nearly new one as they sell for only a little more than that price.
    But even at $47 it wasn't really a good deal, it could be all ragged out on the inside from lean runs, etc.

    Club Saito #722, Sig Kadet Brotherhood #80, GlowHead Brotherhood #14,
    AMA # 928076

  24. #174
    AmishWarlord's Avatar
    Join Date
    Oct 2002
    Location
    Indian Trail, NC
    Posts
    2,872
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club



    I made up some jug labels today to keep my Sportster fuel separated from my Sport fuel.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Om34577.jpg 
Views:	9 
Size:	65.4 KB 
ID:	1775060  

  25. #175
    earlwb's Avatar
    Join Date
    Aug 2009
    Location
    Grapevine, TX
    Posts
    5,459
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: K&B Sportster Club

    That is pretty cool.The labels look good.

    Club Saito #722, Sig Kadet Brotherhood #80, GlowHead Brotherhood #14,
    AMA # 928076


Page 7 of 16 FirstFirst ... 56789 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 12:28 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.