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Search: Posts Made By: bpbrinson
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Forum: Aerodynamics
03-12-2014, 01:21 PM
Replies: 27
Views: 6,613
Posted By bpbrinson

I used a Klingberg wing type of yaw dampening...

I used a Klingberg wing type of yaw dampening system on early Zagi's, both slope and powered. Worked well. Klingberg yaw dampening is very simple. Small, very undersized, hinged tip verticals. I...
Forum: Aerodynamics
01-18-2014, 05:53 PM
Replies: 127
Views: 8,119
Posted By bpbrinson

I agree! People are afraid to learn to fly slow....

I agree! People are afraid to learn to fly slow. Yes, it gets mushy and insecure feeling…… Fly the plane!

Brooks
Forum: Aerodynamics
01-18-2014, 12:47 PM
Replies: 127
Views: 8,119
Posted By bpbrinson

Airplane manufacturer CG recommendations are...

Airplane manufacturer CG recommendations are always toward the forward range. It takes time to find the proper CG for the airplane AND your flying style. I have flown large scale birds, aerobatic,...
01-03-2014, 08:18 PM
Replies: 288
Views: 26,175
Posted By bpbrinson

I guess what I was trying to say in my previous...

I guess what I was trying to say in my previous post is….with the use of files, polish wheels and shims, I am sure you can make that .09 run just as we made the .049's run. Again calling all old...
01-01-2014, 07:40 PM
Replies: 288
Views: 26,175
Posted By bpbrinson

We raced a 1/2A pylon class that anything could...

We raced a 1/2A pylon class that anything could go as long as the wing was 200 sq. inch. Cox was the early engine as we moved to AME's, VA's and such. Many ran a bladder tank, especially Cox. Use...
11-22-2013, 10:07 AM
Replies: 6
Views: 738
Posted By bpbrinson

Auction is the only way to go……I had about 18...

Auction is the only way to go……I had about 18 motors that I had listed on a club website. Only one sold. Adding up what I was asking totaled $450. I put them on Ebay and got over $1200. Some of...
10-30-2013, 01:24 PM
Replies: 78
Views: 6,070
Posted By bpbrinson

Iron, I wished I had the time to design and...

Iron, I wished I had the time to design and build. I barely had time to "install" the components in mine, much less fly. I have a design that I nearly perfected in the 90's that I want to do...
10-29-2013, 12:50 PM
Replies: 78
Views: 6,070
Posted By bpbrinson

Off the shelf extreme speed just costs money now,...

Off the shelf extreme speed just costs money now, as opposed to a few years ago. To go fast in the past, glow was the only option and a custom airframe. I was deep into the fast stuff beginning in...
10-22-2013, 06:31 PM
Replies: 13
Views: 941
Posted By bpbrinson

Make sure the needle is set just above four...

Make sure the needle is set just above four stroking. Smoking alot! For speed I ran 9x8 - 9x10 on piped .45's Your engine is unloading and you are going lean causing surging. Set it fat! Ditto...
05-17-2013, 06:02 PM
Replies: 19
Views: 2,419
Posted By bpbrinson

RE: 200mph electric delta brainstorming

A 200 mph F5D should stay under $1000 unless you go for one of the high end airframes. And about 1KW will do it. The current crop of F5D can not hold enough battery to hit 230-260. If you tried,...
05-16-2013, 08:01 PM
Replies: 19
Views: 2,419
Posted By bpbrinson

RE: 200mph electric delta brainstorming

swing this! Gonna need a fair amount of wattage...........and a gearbox.


http://www.soaringusa.com/GM-10x23-30-5mm-Set.html
10-09-2012, 10:48 PM
Replies: 20
Views: 2,456
Posted By bpbrinson

RE: Picco 45 DF

Yes, I had to cut cooling holes in my fairing work or otherwise cook under the faired area. I blew silicone often. I did cut down that prop to at or just under 7 inches. Some one posted a while...
10-09-2012, 09:15 PM
Replies: 20
Views: 2,456
Posted By bpbrinson

RE: Picco 45 DF

Here is a pic of an average run on that day. Did get a 213 on one run. Was not too sure about that one. Wished I had a pic of the plane,I think those pics ended up at an ex's house. It was a foam...
10-09-2012, 03:25 PM
Replies: 20
Views: 2,456
Posted By bpbrinson

RE: Picco 45 DF

I have ran the K&B (mine)and the old OS FI/RE (buddies). The Picco, comparatively is a brick, very heavy. Seems with the pumped K&B that I was only getting upper 22k and the OS was in the lower to...
10-09-2012, 02:24 PM
Replies: 20
Views: 2,456
Posted By bpbrinson

RE: Picco 45 DF

Pipes are very well used, one crashed but usable. I did have 2 other Picco's. Been flying fast a long time. Just because you guys dont see someone post does not mean every one else flies...
10-09-2012, 02:22 PM
Replies: 20
Views: 2,456
Posted By bpbrinson

RE: Picco 45 DF

15 years in an attic in southeast Texas, you would look well used also. I can assure you it has not even had a glow plug screwed in. Minor aluminum oxidation causing minimum outer discoloration. ...
10-09-2012, 09:04 AM
Replies: 20
Views: 2,456
Posted By bpbrinson

Picco 45 DF

Just to let you guys know..... http://www.ebay.com/itm/290787814256?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649
Forum: Glow Engines
09-28-2012, 12:09 PM
Replies: 63
Views: 7,573
Posted By bpbrinson

RE: Strongest 46 engine

Ok, never mind........ should have read the rules
Forum: Glow Engines
09-28-2012, 12:04 PM
Replies: 63
Views: 7,573
Posted By bpbrinson

RE: Strongest 46 engine

Just did some quick calculations and a 11x4 APC turned at 16,200 Rpm is making almost 12 lbs of thrust static. That would power a 24 lb airplane quite well with a climb at over 30 degrees. That is a...
Forum: Glow Engines
09-28-2012, 08:56 AM
Replies: 63
Views: 7,573
Posted By bpbrinson

RE: Strongest 46 engine

Jett is the best choice, hands down. The other fact in favor of Jett is the fact you can contact Dub Jett personally and he can advise and build/tune to specific needs. ...
Forum: Aerodynamics
04-03-2012, 04:07 PM
Replies: 125
Views: 13,310
Posted By bpbrinson

RE: Maximum altitude??

Yep, Jessie. Junior student engineer just killed his thread with arrogance. At least I waited till after graduation before I went through my arrogant stage. I have had vast experience with all...
Forum: Aerodynamics
04-03-2012, 11:08 AM
Replies: 125
Views: 13,310
Posted By bpbrinson

RE: Maximum altitude??

No, never said horrible, run as big and slow turning a prop as as possible. Keep it as clean and smooth as possible ahead of the propeller. I will volunteer to make power plant suggestions when you...
Forum: Aerodynamics
04-03-2012, 10:28 AM
Replies: 125
Views: 13,310
Posted By bpbrinson

RE: Maximum altitude??

RG is correct. The projects that I consulted and flew, had to be flown in restricted airspace. Controlled military base. We were also required to have a recovery parachute. The parachutes purpose...
Forum: Aerodynamics
04-03-2012, 10:16 AM
Replies: 125
Views: 13,310
Posted By bpbrinson

RE: Maximum altitude??

"Hemmorage of airspeed" = induced drag. There is no difference between hard turns and slow flight only airspeed. High AOA that is required to fly a delta (tailless) slowly requires lots of power....
Forum: Aerodynamics
04-03-2012, 09:11 AM
Replies: 125
Views: 13,310
Posted By bpbrinson

RE: Maximum altitude??

1st question is always " What do you want to carry and what do you want to do with it?" I was simply trying to get to that. You have been very vague, but asking for help. There are some...
Showing results 1 to 25 of 33
 


 
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