I have a question pertaining to the install of the carb onto both intake manifold and the air box? I'm assuming a gasket is used? Is there a gasket on both surfaces? Should any gasket sealant be used in addition, if so which type? Also what is an approx torque setting for the carb bolts on a ma3spa carb? Thank you all, greg
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Re: Essential documents for TW building?
It's there anyone on the forum that has a Staton builder manual that would like to sell it? If so reach out to me. Thanks!
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Sorry for the late response guys. Yes I did contact Mark and had a great conversation with him. He is up to his eyeballs in the Howard and warbird things. He does have some stock for his kit and I have some thinking to do. My son is up near him in Madison so I might just head on up for a visit and maybe get a few hints and skills from him. Food for thought. Thanks for all the responses. I¡¯ll keep you updated when I pull the trigger.?
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Hi Christian,
I wish it was 230 TAS but it was not. These numbers are the average of four stabilized ground speed observations per ADSB data as reported on flightaware for approximate headings of 360, 090, 180, and 270. Assuming constant winds aloft this as close as I¡¯m likely to get to estimating TAS.
IAS at 7500¡¯ and WOT was about 185mph and at 7500¡¯ and 2500rpm IAS was about 175mph.?
Note that I do not have an autopilot and so stabilized is a relative term.?
On Sun, Mar 9, 2025 at 9:07?PM Christian Bobka via <blamebobka= [email protected]> wrote: Is that IAS. ? TAS increases 2 percent per 1000¡¯ as a rule of thumb so 200 IAS at 7.5k is 230 mph TAS?
Pitch adjusted as below was perfect (23.6 degrees from spinner back plate to pitch paddle).? Taped gear leg intersection fairings. Attempted stabilized flight at 4 points of compass at 7500¡¯MSL at WOT (full rich) and at 2500RPM (leaned).? -Static RPM 1880? -Takeoff roll <1000ft? -Takeoff weight ~1300#? -3500¡¯ MSL WOT would try to exceed 2700 rpm unless reduce power or climb. ? -7500¡¯ MSL WOT approx 200mph at approx 2680rpm -7500¡¯ MSL 2500RPM 185mph? -In 0.9 hrs burned approx 7 gal
For now I¡¯m going to leave pitch alone.?
Jim Rust,
Your estimate was perfect. I reduced pitch 3 degrees and now at ~7500 MSL WOT exceeds 2700rpm so the flightaware plot is at less than WOT at ~23¡± MAP and about 2680rpm. Average ground speed 195mph. I plan to add back ~0.5 degrees to the prop, tape the gear leg fairings, put more paint on the spinner and hope for at least 200mph WOT down low around 3000 MSL.?
Thanks again, Bob Wray
Bob
Your RPM is way too low and thus giving up a lot of take off , climb and top speed performance. As per GA200L propeller set up Instructions, ?WOT straight and level RPM should be 2700. With this setting your TW will easily reach 195 mph, probably
more. Plus take off and climb will be substantially better. At. WOT rpm is proportional to HP, more HP is more thrust, more thrust always =more performance.
Est. Reduce pitch approx 3 degrees
Tried and true method to measure performance is to compare fuel flow for a given speed
Jim Rust
Whilwind prop pitch adjustments:
Flew 1/2 hour today with a lot more pitch (26.1 degrees relative to new spinner back plate). This is approximately the same pitch angle I had last summer that gave me about 195 mph. Todays 26.1 degrees was with a different hub, relative to a
different backing plate, and was measured with a different protractor. Whatever the source of difference this is now (probably) too much pitch. Today WOT at 7500¡¯ ?gave 23.2¡±MAP 2400rpm and 191mph average stabilized ground speed flying 4 points of compass.
?This was without spinner dome.
Also
static rpm was only 1800rpm.
? I plan to make more flights including some lower altitude flights at WOT and less than WOT with spinner dome installed before adjusting pitch again. Currently I expect to target <25 degrees.?
Also, I posted a basic ad on Barnstormers.? Note that I may replace N115WT with a low and slow airplane that could be a primary trainer for my young adult children.?
Whirlwind prop (new whirlwind spinner going on now, see pic). Efficient cowl. Low drag wheel pants with nice gear leg fairings (taping them adds a few knots but I haven¡¯t learned to do it without making an ugly mess). A very nice single piece
of carbon fiber that provides both sides wing root fairing and runs across the fuselage at the back of the windscreen that is a work of art. Very smoothly built wings. Simple and light build.?
Those are incremental factors. The quantum leap came from Steve Wittman and his wonderful design. ?
On Mon, Feb 17, 2025 at 6:07?AM Thomas B via <tbinpittsboro= [email protected]> wrote:
Thank you for that detailed info, Bob.? Great performance :)
Noticed the plenum on the previous pic you posted, any other efficiency tweaks done on your TW ? ??
Thomas in NC
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
|
I¡¯m a little late to this thread but I thought I would chime in. I purchased mark¡¯s kit. The jigs are nicely done to build the ribs in. If you purchase the kit make sure to wax the daylight out of the jigs with a good carnauba wax. The wax will help make your jigs last longer. When I was finished building the ribs all of the parts fit together as I expected. Your spars are all cut to size. His kit is slightly different from Steve¡¯s plans. On the last outboard full size rib he does not skin the rib on both sides with a full covering of plywood.?
on the inboard taper of the wing near the fuselage I thought my leading edge profile is much blunter than the rest of the wing. ?I may change that just for cosmetics.?
I purchased my plywood from a boat restoration shop in Minnesota. The price was good and I was close enough to just pick it up.
The kit is not cheap. If you are the person who enjoys putting a puzzle together you can choose to trade dollars for convenience. For additional effort you can purchase cap strip and plywood and cut out your own gussets, mill spars, build your jigs and build the wing.?
note: ?I was strongly encouraged to plywood skin the outboard rib on both sides.?
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Is that IAS. ? TAS increases 2 percent per 1000¡¯ as a rule of thumb so 200 IAS at 7.5k is 230 mph TAS?
Pitch adjusted as below was perfect (23.6 degrees from spinner back plate to pitch paddle).? Taped gear leg intersection fairings. Attempted stabilized flight at 4 points of compass at 7500¡¯MSL at WOT (full rich) and at 2500RPM (leaned).? -Static RPM 1880? -Takeoff roll <1000ft? -Takeoff weight ~1300#? -3500¡¯ MSL WOT would try to exceed 2700 rpm unless reduce power or climb. ? -7500¡¯ MSL WOT approx 200mph at approx 2680rpm -7500¡¯ MSL 2500RPM 185mph? -In 0.9 hrs burned approx 7 gal
For now I¡¯m going to leave pitch alone.?
Jim Rust,
Your estimate was perfect. I reduced pitch 3 degrees and now at ~7500 MSL WOT exceeds 2700rpm so the flightaware plot is at less than WOT at ~23¡± MAP and about 2680rpm. Average ground speed 195mph. I plan to add back ~0.5 degrees to the prop, tape the gear leg fairings, put more paint on the spinner and hope for at least 200mph WOT down low around 3000 MSL.?
Thanks again, Bob Wray
Bob
Your RPM is way too low and thus giving up a lot of take off , climb and top speed performance. As per GA200L propeller set up Instructions, ?WOT straight and level RPM should be 2700. With this setting your TW will easily reach 195 mph, probably
more. Plus take off and climb will be substantially better. At. WOT rpm is proportional to HP, more HP is more thrust, more thrust always =more performance.
Est. Reduce pitch approx 3 degrees
Tried and true method to measure performance is to compare fuel flow for a given speed
Jim Rust
Whilwind prop pitch adjustments:
Flew 1/2 hour today with a lot more pitch (26.1 degrees relative to new spinner back plate). This is approximately the same pitch angle I had last summer that gave me about 195 mph. Todays 26.1 degrees was with a different hub, relative to a
different backing plate, and was measured with a different protractor. Whatever the source of difference this is now (probably) too much pitch. Today WOT at 7500¡¯ ?gave 23.2¡±MAP 2400rpm and 191mph average stabilized ground speed flying 4 points of compass.
?This was without spinner dome.
Also
static rpm was only 1800rpm.
? I plan to make more flights including some lower altitude flights at WOT and less than WOT with spinner dome installed before adjusting pitch again. Currently I expect to target <25 degrees.?
Also, I posted a basic ad on Barnstormers.? Note that I may replace N115WT with a low and slow airplane that could be a primary trainer for my young adult children.?
Whirlwind prop (new whirlwind spinner going on now, see pic). Efficient cowl. Low drag wheel pants with nice gear leg fairings (taping them adds a few knots but I haven¡¯t learned to do it without making an ugly mess). A very nice single piece
of carbon fiber that provides both sides wing root fairing and runs across the fuselage at the back of the windscreen that is a work of art. Very smoothly built wings. Simple and light build.?
Those are incremental factors. The quantum leap came from Steve Wittman and his wonderful design. ?
On Mon, Feb 17, 2025 at 6:07?AM Thomas B via <tbinpittsboro= [email protected]> wrote:
Thank you for that detailed info, Bob.? Great performance :)
Noticed the plenum on the previous pic you posted, any other efficiency tweaks done on your TW ? ??
Thomas in NC
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
|
Pitch adjusted as below was perfect (23.6 degrees from spinner back plate to pitch paddle).? Taped gear leg intersection fairings. Attempted stabilized flight at 4 points of compass at 7500¡¯MSL at WOT (full rich) and at 2500RPM (leaned).? -Static RPM 1880? -Takeoff roll <1000ft? -Takeoff weight ~1300#? -3500¡¯ MSL WOT would try to exceed 2700 rpm unless reduce power or climb. ? -7500¡¯ MSL WOT approx 200mph at approx 2680rpm -7500¡¯ MSL 2500RPM 185mph? -In 0.9 hrs burned approx 7 gal
For now I¡¯m going to leave pitch alone.?
Jim Rust,
Your estimate was perfect. I reduced pitch 3 degrees and now at ~7500 MSL WOT exceeds 2700rpm so the flightaware plot is at less than WOT at ~23¡± MAP and about 2680rpm. Average ground speed 195mph. I plan to add back ~0.5 degrees to the prop, tape the gear leg fairings, put more paint on the spinner and hope for at least 200mph WOT down low around 3000 MSL.?
Thanks again, Bob Wray
Bob
Your RPM is way too low and thus giving up a lot of take off , climb and top speed performance. As per GA200L propeller set up Instructions, ?WOT straight and level RPM should be 2700. With this setting your TW will easily reach 195 mph, probably
more. Plus take off and climb will be substantially better. At. WOT rpm is proportional to HP, more HP is more thrust, more thrust always =more performance.
Est. Reduce pitch approx 3 degrees
Tried and true method to measure performance is to compare fuel flow for a given speed
Jim Rust
Whilwind prop pitch adjustments:
Flew 1/2 hour today with a lot more pitch (26.1 degrees relative to new spinner back plate). This is approximately the same pitch angle I had last summer that gave me about 195 mph. Todays 26.1 degrees was with a different hub, relative to a
different backing plate, and was measured with a different protractor. Whatever the source of difference this is now (probably) too much pitch. Today WOT at 7500¡¯ ?gave 23.2¡±MAP 2400rpm and 191mph average stabilized ground speed flying 4 points of compass.
?This was without spinner dome.
Also
static rpm was only 1800rpm.
? I plan to make more flights including some lower altitude flights at WOT and less than WOT with spinner dome installed before adjusting pitch again. Currently I expect to target <25 degrees.?
Also, I posted a basic ad on Barnstormers.? Note that I may replace N115WT with a low and slow airplane that could be a primary trainer for my young adult children.?
Whirlwind prop (new whirlwind spinner going on now, see pic). Efficient cowl. Low drag wheel pants with nice gear leg fairings (taping them adds a few knots but I haven¡¯t learned to do it without making an ugly mess). A very nice single piece
of carbon fiber that provides both sides wing root fairing and runs across the fuselage at the back of the windscreen that is a work of art. Very smoothly built wings. Simple and light build.?
Those are incremental factors. The quantum leap came from Steve Wittman and his wonderful design. ?
On Mon, Feb 17, 2025 at 6:07?AM Thomas B via <tbinpittsboro= [email protected]> wrote:
Thank you for that detailed info, Bob.? Great performance :)
Noticed the plenum on the previous pic you posted, any other efficiency tweaks done on your TW ? ??
Thomas in NC
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
--
Bob Wray
N115WT
KABI
|
Re: Auto Pilot servo mounting
Wittman W10 Oz - VH-TLW
?
How I did mine
?
Aileron bracket from underside view
?
?
?
Aileron bracket from seat floor view
?
?
?
?
Aileron servo connected
?
?
?
?
?
Elevator bracket from under baggage floor view
?
?
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Re: Auto Pilot servo mounting
Hey Jack, I have a W-10 Trike. I¡¯m interested in a TruTrak autopilot installation so any pictures of yours would be greatly appreciated. Thanks, Karl. ? ? ? ?capkrl@...
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I think it was called the hiperbipe.
Keith
toggle quoted message
Show quoted text
-------- Original message -------- From: "George Willard via groups.io" <willard.19@...> Date: 3/7/25 3:48 PM (GMT-06:00) Subject: Re: [TailwindForum] Wing build
Were those for the Tailwind quadplane ? ?
On Mar 7, 2025, at 4:34?PM, Tom Siegler via groups.io <tmsiegler@...> wrote:
?I have 4 sets of wings mostly assembled ribs and leading edges and woo tips on the spars. No skins on yet. Located in Wichita ks. On Fri, Mar 7, 2025 at 10:43 AM, DjD via groups.io <twind.dan@...> wrote: The Stamsta kit has the tip ribs and the rib jigs for both sets of ribs last I looked...
Sent from my Pixel 5a Talk to Marc Stamsta (?Max?Aero). He is building parts for Tailwind & Howard planes. 262-490-8451.
Steven B
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Were those for the Tailwind quadplane ? ?
toggle quoted message
Show quoted text
On Mar 7, 2025, at 4:34?PM, Tom Siegler via groups.io <tmsiegler@...> wrote:
?I have 4 sets of wings mostly assembled ribs and leading edges and woo tips on the spars. No skins on yet. Located in Wichita ks. On Fri, Mar 7, 2025 at 10:43 AM, DjD via groups.io <twind.dan@...> wrote: The Stamsta kit has the tip ribs and the rib jigs for both sets of ribs last I looked...
Sent from my Pixel 5a Talk to Marc Stamsta (?Max?Aero). He is building parts for Tailwind & Howard planes. 262-490-8451.
Steven B
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I have 4 sets of wings mostly assembled ribs and leading edges and woo tips on the spars. No skins on yet. Located in Wichita ks.
On Fri, Mar 7, 2025 at 10:43 AM, DjD via groups.io <twind.dan@...> wrote: The Stamsta kit has the tip ribs and the rib jigs for both sets of ribs last I looked...
Sent from my Pixel 5a Talk to Marc Stamsta (?Max?Aero). He is building parts for Tailwind & Howard planes. 262-490-8451.
Steven B
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The Stamsta kit has the tip ribs and the rib jigs for both sets of ribs last I looked...
Sent from my Pixel 5a
Talk to Marc Stamsta (?Max?Aero). He is building parts for Tailwind & Howard planes. 262-490-8451.
Steven B
|
Talk to Marc Stamsta (?Max?Aero). He is building parts for Tailwind & Howard planes. 262-490-8451.
Steven B
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ELT main battery VS cold weather!!
Today I replaced the two small batteries (not the main transmit battery) on my ACK 406 ELT system.? One was for the small "alert cartridge" that has a beeper in it and one was for the remote testing/activation unit.? ?I had the alert unit mounted on the fuel tank with Velcro and of course the remote unit in the panel.? Alert unit was easy to change the battery as I just unplugged it and took it out to replace the battery.? The other unit was not so easy as I had it mounted with some machine screws with nuts on the back side.? If I was to do it again, I would put nut plates back there.? These batteries are to be replaced every 10 years so it was my first time.
?
Upon replacing the batteries I did the 90 day self test and got a 5 beep error code.? It had been awhile since I had tested it but it worked fine that last time.? Needless to say, I was not real pleased and thought perhaps,? I had did something wrong in the installation of the new batteries.? a 5 beep code indicates "high VSWR or high current"? ? I called ACK and he said it might indicate a bad coax connection to the ELT antenna and that changing those little batteries would not cause that.? ?He said check the BNC connections and if still a problem send it back ( probably $$$$).? ?I did some internet research and found that it is possible that a low main battery could possibly cause that also AND that if the battery is very cold it reduces the voltage and could also cause it.? This main battery is due for replacement in November of 2025 so thought maybe that was the problem
?
So I opened up the rear of the fuselage and checked the connections. They seemed OK although one of them seemed a little "tight" and I was not sure it had seated properly.? Anyway got that all squared away and tried the test again and STILL got the 5 beep error code.? ?It had been about 18 degrees last night so I decided to go ahead and try to warm up the main battery.? Put my little cockpit ceramic heater back there and pointed it at the battery for 15 minutes and tried it again and it worked!? I am attaching a pic of the ELT mounting.? There had been a question recently about antenna mounting.? You can see about where my antenna is mounted if you follow the coax cable.? The pic doesn't show the mount but it is just mounted to a diagonal tube about 1 inch above the top of that pic.
?
So if you have an ACK 406 ELT and you have this problem it might possibly be the cold battery.? Note that this post probably doesn't apply for those of you that are smart enough to live in a warmer climate.? :)
?
Keith
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Re: Auto Pilot servo mounting
Dynon has, on their website, CAD models of most of their products including servos. These CAD models can be used to 3D print plastic replicas complete with servo arms and properly spaced mounting holes. These are useful for making and locating mounts without having to purchase the real servo.? ~George
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Show quoted text
On Mar 6, 2025, at 5:57?PM, Keith Klos via groups.io <kloskeith@...> wrote:
? Recently someone had asked for info on how to mount their auto pilot servos but I can't find that thread.? ?Today I had my fuselage open in order to work on the ELT and thought I would take some pics of? how I mounted my AP servos.? As you can see I had welded two tabs on the bottom diagonal in the rear and also on a cross tube in the front.? I then ran two angle aluminum pieces fore and aft with some additional cross angles to mount each servo on.
?
Hope that helps.
?
Keith
<AP servo mounting.jpg>
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Re: Auto Pilot servo mounting
I have pictures from my TW that I no longer have. Want those (whomever was asking?)? Just posting one pic but email me directly if you want more from different angles.? It was very clever how it was done.? It was for a Trutrak.
imapilot5@...? ? ?Jack
On Thursday, March 6, 2025 at 05:57:24 PM EST, Keith Klos via groups.io <kloskeith@...> wrote:
Recently someone had asked for info on how to mount their auto pilot servos but I can't find that thread.? ?Today I had my fuselage open in order to work on the ELT and thought I would take some pics of? how I mounted my AP servos.? As you can see I had welded two tabs on the bottom diagonal in the rear and also on a cross tube in the front.? I then ran two angle aluminum pieces fore and aft with some additional cross angles to mount each servo on.
?
Hope that helps.
?
Keith
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Re: ELT Antenna Mounting location INSIDE fuse?
Had my fuselage open to work on the ELT and took this picture that might help understand how I mounted my ELT.? The "alert cartridge" with the beeper in it is mounted on my gas tank under the panel and of course the test switch/activation switch unit is mounted in the panel.? ?I had some interesting learnings today about the ELT battery which I will post on a separate thread.? Please read it if you have an ACK 406 ELT
?
Keith
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Auto Pilot servo mounting
Recently someone had asked for info on how to mount their auto pilot servos but I can't find that thread.? ?Today I had my fuselage open in order to work on the ELT and thought I would take some pics of? how I mounted my AP servos.? As you can see I had welded two tabs on the bottom diagonal in the rear and also on a cross tube in the front.? I then ran two angle aluminum pieces fore and aft with some additional cross angles to mount each servo on.
?
Hope that helps.
?
Keith
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Ok everyone I¡¯m about ready to start my build and I¡¯ll be starting with the wings while I continue to practice my welding. I¡¯ll be starting with the ribs. My question is, is the aircraft spruce ¡°spruce kit¡± what I¡¯ll need to get going? A different or better source? Any suggestions would be appreciated. Yes I have the plans and I even have the Stanton plans I ordered a couple years ago.?
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Greg Blake
Bob Wray
tailwindtoo
keith
Steven Becker
Keith Klos
