Minggu, 31 Desember 2006

Leaky O-rings...



In my first little tank I used soft rubber o-rings. These will not work for LOX. So I've spent the last two days trying to get PTFE or FEP encapsulated o-rings to not leak. I've been trying to build a 3" tank to test my PET tank ideas. The picture on the left is the top end of the tank after the first winding step to reinforce the area around the o-ring before starting to wind the longitudinal fibers.
The next picture is the tank with the longitudinal windings in place, about to be filled with water before doing the radial winding. I did not get past this point because....

The third picture shows water leaking around the seal.
Having a light high pressure LOX tank would greatly simplify some of the project, but it's not worth spending a whole lot more time on. I'm going to order some more o-rings from McMaster carr and try one more time , but if I can't build light LOX tanks I'll just use aluminum irrigation pipe and work to get something flying. I have to keep reminding myself that perfect is the enemy of good enough.

Senin, 25 Desember 2006

Gone for a few days...

I spent the days before Christmas working on a 3" version of my Tank. I machined two spherical end caps and they looked good up to the point I CNCed the lacing posts . I ruined one of the caps and need to make another.

I did to some ln2 tests with the end cap. With the PET tube filled with Ln2 it does not leak or break, and the PETG still seems flexible.

You won't here from me much for the rest of the week as this is my 20th wedding anniversary and we are going away for a few days.

Senin, 18 Desember 2006

An Update...

Site Prep:
Last Wedensday I went out to the FAR site to help pour the big test stand. 5 People poured 145,000 lbs of concrete in about 6 hours. It looks like it all went well. Many thnaks to my wife who came out and helped finish the concrete. Jerry Irvine took lots of pictures if I get a picture of her with the trowel in hand I'll post it. This project would not be possible without her support.

Valves:
I ordered some more three piece valves from McMastercarr I'm going to make up the following valves and test them: Drill Motor Drive, Industrial Servo Drive, and BaneBot motor drive. I will LN2 test these and the KZCO valve this weekend! I have the week after Christmas off so I have high hopes of getting lots done.

Tanks:
I was told that the florescent light tubes are Polycarbonate, not PET, so I ordered some 3"x36" PETG tubes from Uline packaging. They assured me that the tubes are PETG, alas they look just like the florescent tube covers just bigger. If anyone has a bullet proof way to identify PET please let me know. PET Soda bottles shrink when heated, these tubes do not seem to do so.
In any case I'm making new spherical tank end caps for the 3" tubes. Its amazing how much
aluminum chips can come from a 3" long 3" diameter block of aluminum....

Testing..
My last tank leaked at the fittings. So I spent Most of the day Sunday making NPTF pipe threads on the lathe and testing them to see if they are pressure tight. Today my new hand pumped hydrostatic tester arrived from McMaster Carr. (Thanks Xcor for the tip)
I hooked it up bled most of the air out of my fitting and tested my fitting to 3000 PSI the good news it held... The bad news in my hurry to test my handy work I did not bleed the air out of the hose and it did not dawn on me that the hydro tester has no bleed valve, so now its sitting at 2700 PSI and I'm afraid to crack the fittings. I'll let it sit for a day and hopefully it will bleed down. When I was working on my instrument pilots license, any time I had a spare moment to think me my flight instructor would ask what are you working on now....the proper answer at all times was the next thing. Making sure that you know what the next thing you are going to do no matter the outcome is good advice for all aspects of life.

Selasa, 12 Desember 2006

The Business Plan

The FinAngler Charters Investment Group is designed to raise capital to start a new niche charter fishing company in the Florida Keys. As a charter captain that truly loves the office I work in, I want to share the Florida Keys with my investors. That’s why I’m offering five free fishing trips per year to each of the investors.

Returns on investment are estimated at a respectable 25% per year over the three-year term of the investment. There is considerable potential to expand the fleet. With Cay Clubs having four locations in Marathon, to be fully operational by early 2008, a fleet of approximately eight backcountry boats is quite feasible. Other locations in Key Largo, Key West and Islamorada are potential areas for expansion. Cristal Clear Water sports will coordinate water sports concessions and charter bookings for Cay Clubs. Affiliation with Cristal Clear Water Sports will provide an exceptional pool of potential charter customers. See their website: http://www.CristalClearCharters.com

Typically, it takes three years for a charter business to become fully establish. The first year is slow. It really doesn’t matter how much advertising money you allot, returning customers and referrals from these customers, make the business. Properly placed ads, a well-built web site, affiliation with Cristal Clear Water Sports, and word of mouth advertising generated by the investor group, are adequate to generate the numbers listed in the following tables.

Five initial investors are desired. My intention is that these investors will provide the most valuable advertising any charter business can have, word of mouth. If each investor talks three friends into taking a single fishing vacation, seventy-five trips per year can be generated through free investor advertising.

The FinAngler Charters Investment Group isn’t designed to make any one super rich. It’s designed to let investors enjoy the fruits of their labors. To take a small fraction of what they have earned and develop a vacation getaway that makes money for them and lets them, and others, experience some of the finest fishing in the world. .

Captain Dallas


The Business Plan

Executive summary: Captain Dallas Tisdale. I’ve worked as a charter captain, guide and mate, in the Florida Keys since 2000. Prior to that, I’ve fished Florida for over thirty years, mainly recreationally, on my own boats. I started guide operations at Captain Pips Marina and Hideaways and helped start charter operations at Captain Pips Marina and Hideaways. While I have never cared for publicity, there is an article including me in Bass Masters magazine, February 1999, a small article in the Florida Sportsman, January 2000, and a number of newspaper articles in the Florida Times Union and the Weekly Fisherman.

My primary business consultant is Jim Dogherty, an inventor and co-owner in E P and R Corporation. Jim is a former customer that I unfortunately addicted to fishing. Had Jim not decided to open a barbecue joint in Galva, Illinois, he would be my primary investor.
After that mistake, (which his wife and I are still wondering what the hell he was thinking about), he is relegated to marketing.

Business Description: This is a Charter Fishing Enterprise. We are seeking to fill a niche between the high priced offshore charters and the flats fishing charters. Marathon offers some of the finest fishing in the world. Our charters are designed to show customers all the angling potential of the Marathon area.

Marketing Strategies: Our primary marketing strategy involves investors. Word of mouth advertising has and will remain to be the best advertising there is. Each investor is given five charter fishing trips per year to evaluate their investment. We expect three to five referrals per investor each year. With an average stay of five days per vacationer, approximately 75 trips per year will be booked through investor activity. Our affiliation with Cristal Clear Water Sports should provide an additional 75 trips a year. Customer referrals, proper directed marketing should produce an additional 75 trips. Sixty to eighty percent of customers return in following years. By the third year, minimal marketing is required to maintain a solid customer base.

Competitive Analysis:
Big boat charters and the big cost associated with them, are over whelming the Marathon charter fleet. More big boats are on the way, greatly limiting the opportunities at this end of the charter spectrum. The mid-size boat charter fleet has been greatly reduced in the past three years. Smaller flats boat competition is limited to about 15 percent of the market during season due to the weather. We have selected to run fuel-efficient 26 foot boats that offer excellent adaptability to a variety of fishing applications out of Marathon.


The Game Plan: The first boat in the charter fleet has to be a success, or there isn’t a charter fleet. Start-up capital for first boat is just over $41,000.00. That pays for the boat and gives the business four months operating capital to get things going. With five investors talking things up and Cristal Clear Water Sports to book charters, this should be easy. Making sure that these first customers get quality fish and treatment is my job. I’m pretty good at it. I’ve been doing the charter thing for over seven years and I do know what I’m doing. I have to make sure that 98% of the customers talk good about the charter service. Word of mouth is where it’s at. Pardon my grammar, but it is. If a customer complains, that’s real bad!! So a captain has to go the extra yard to make the right stuff happen. I’ve been there and done that, no problem. Timing the start of the charter start up is somewhat important. An in season start greatly improves success. Off-season start up could strain capital reserves. Idea start up timing is December through February, March through May is reasonable, August, through October, is not recommended.

The Financial End:

In the table below, the total the half days, full days and tarpon trips, is 260 trips. Tarpon trips are run in the late evening or early morning, freeing the boat to run a half-day or full day charter on the same day. With these estimates, the boat will be operating, 180 to 200 days a year with paying customers. An additional 25 days a year are set-aside for investor incentive charters. Charter boats can easily operate 300 days per year in Marathon once established. This gives a comfortable margin of error to the following estimates.

Table 1 - Average Income and Expenses by Charter Type
Full Day Half Day Tarpon Trip
Expenses Expenses Expenses
Captain $150.00 $80.00 $60.00
Fuel&Oil $32.50 $20.00 $3.00
Bait&Ice $30.00 $15.00 $36.00
Tackle $10.00 $5.00 $5.00
Commissions/Discounts $82.50 $52.50 $48.75

Totals $305.00 $172.50 $152.75
Income Income Income
Trip Price $550.00 $350.00 $325.00

Gross Profit Per Trip $245.00 $177.50 $172.25
Trips Per Year 140 60 60
Gross Income $77,000.00 $21,000.00 $19,500.00
Annual Gross Profit $34,300.00 $10,650.00 $10,335.00











The following table list fixed expenses for operating the charter business. The advertising expense below, would be considered low if not for the Commissions / Discounts expense included in the previous table. Commissions will be paid to booking agencies and discounts will be offered to groups, like the military’s MWR program.

Table 2 – Fixed Annual Expenses
Fixed Annual
Expenses
Dockage $7,200.00
Insurance $2,500.00
Business License $250.00
Fishing License $600.00
Utilities $100.00
Advertising $2,500.00
Accounting $1,200.00
Management $7,200.00
Legal (incorp.) $600.00
Maintenance $1,000.00
Boat Depreciation $6,000.00
Total Fixed $29,150.00


Combining the data from table 1 and table 2, the gross income and profit estimates are as indicated below:


Gross annual Income $117,500.00
Gross profit Excluding Fixed Expenses $55,285.00
Gross Profit $26,135.00



Prior to distributions to investors, four months operating capital is to be retained by the charter business for off-season operating expenses. Again, this is being overly conservative. In the following years, retained earnings withholdings will be limited to replenishing this fund.

Retained Earnings
Dockage $2,400.00
Management $2,400.00
Accounting $400.00
Emergency $1,000.00
$6,200.00

The estimated average annual distribution to investors will vary over the three-year term of the investment. First year distributions are estimated at 50% of this average, second year at the average and third year at 150% of the average, as shown below:

Estimated distributions after Retained Earnings $19,935.00

Year 1 distrib. $9,967.50
Year 2 distrib. $19,935.00
Year 3 distrib $29,902.50
Total $59805.00

At the end of year three, the charter business will purchase the investor equity in the boat valued at $24,000.00, bringing the total investor distributions to $83,805.00.

Initial start-up capital requirements
Dockage $2,400.00
Boat $30,000.00
Sales Tax $1,625.00
Insurance $2,500.00
Business License $250.00
Fishing License $600.00
Utilities $33.33
Advertising $833.33
Book Keeping $400.00
Management $2,400.00
Legal (incorp) $600.00
$41,641.67

The start-up costs are the total capital investment requested of the investor group. Minimum estimated returns on that investment are $83,805.00. If better than estimated sales are achieved, profits over estimates will be distributed to investors.

With five investors, the minimum capital required per investor is $8330.00 with an estimated minimum return on investment of $16,760.00 over three years. A realistic maximum return on investment is $30,000.00 per investor.

Note: Since this original estimate was made, that availability of the base boat has changed. The boat that will be available will be approximately $3500 more than the original estimate. With the popularity of this style boat increasing daily, the cost of the boat could increase further. This is bad for start up, but potentially good in the long term as estimated depreciation should be much less than estimated. Actual data will depend upon costs at the time all investors agree. Initial start up capital required per investor upwardly estimated at $8950 based on five investors. To keep start up at this level, dockage cost will be reduced for the first two months of operation and management cost will be reduce by 50% for the first 3 months. No significant reduction in return on investment is anticipated, provided start up by January 1, 2007 is achieved.

Operations and Management Plan: For the first two boats, Captain Dallas can easily handle management of operations. Should an additional boat(s) be added, a receptionist may be required to answer calls and schedule trips. Sufficient funds are available in the financial plan to cover this cost. Maintenance schedules are very simple since all boats are new and under full warrantee. Minimal down time is expected for the boats. This is a huge advantage over the local competition.


Financial Factors:

No financial factors are anticipated other than those associated with expansion of the business. Boats can be added to the fleet as conditions allow. Each new boat will be considered a separate investment, with terms of investment equal to those stated for the initial boat. In this manner, each new investment, whether by an existing investor or a new investor, can expect the same term, return and incentives, as offered to original investors. Too rapid an expansion can adversely impact performance of the original boat(s). Additional boats will not be added until the original boat(s) exceed estimates sufficiently to ensure minimum estimated returns are achieved.

Off-season start up could strain start up capital. Should the total start up capital required not be available prior to June 1st, 2007, delaying start-up until November 1st, 2007, is recommended.

After the terms of each investment have been satisfied, 80% of the shares in the charter boat will revert to Captain Dallas Tisdale and 20% of the shares, will be retained by the original investor group. The free charters per investor will be reduced to two per year, with up to three more available at cost (just pay the captain). Investors may sell these shares to Captain Dallas Tisdale, or members of the investment group, at fair market value or retain their shares to offset costs of future fishing vacations. Sale of these shares to outside investors is not allowed.

In the event that income falls below estimates or other disputes should arise, investors shall agree to use third party arbitration to determine equitable resolution. The business structure, (limited partnership or chapter S corporation), shall be agreed upon by investors. Accounting oversight and year-end reports will be provided by a Certified Public Accountant paid by the charter business. To get the money here to start things, I’ll have to get the accountant to set up an escrow account, and all the paper work. He should be able to set everything up where nobody has to do a lot of traveling.

Any investment is subject to risk. This investment has been designed to minimize risk and add a little fun to the fund. If you take fishing vacations to the Florida Keys, you recognize the potential value of this investment. FinAngler Charters Investment Group is perfect if you love sport fishing and hate shoveling snow.

Thank you for considering
FinAngler Charters


Captain Dallas Tisdale

12/12/06-A small error was noted in the utilities expenses. That should read $600 not $100. The utilities expense is purely for business telephone service.

A question arose about credit card sales costs. This cost is included in the accounting fees and the percentage of sales charged by the credit card companies is include in the commissions and discounts.

Please note that commissions and discounts will not apply to all sales. Walk-ups, website sales and referrals from investors are not offered discounts unless required to close the deal on a trip.

Another question was raised about single investor financing versus five investor financing performance. With 5 investors, a realistic investor referral estimate is 75 trips. Eighty trips is the break even number required per year. With a single investor only 15 trips per year can be expected through investor referral. While roughly the same return on investment can be expected with single investor financing first year distributions are estimated at zero, with a potential first year loss anticipated. First year loss, second break even or small profit and third year profitability, is the standard growth curve for a charter start-up. Investor referrals are critical for first year profitability.

If you are interested in single investor financing, I have prepared a spread sheet revised for a standard start-up with typical plans for reducing first year costs.

Thank you,

Captain Dallas

Senin, 11 Desember 2006

Back to Valves

My son spent the better part of Sunday machining an adapter to adapt an astroflight brush less motor with 19:1 gearbox to one of the right angle drill mechanics. I tested it this evening and its very disappointing. The sensorless brushless motor does not start well under load. Maston had speed problems with their brushless valve drivers, and I suspect it was because the driver uses back emf to sense the position of the rotor and startup must be slow to get synced up.

I ordered a couple of KZCO valves like the Armadillo team uses and the arrived today. With the top case off of the motor and the cable removed it weighs 1528 grams. With a bit of careful trimming I think I could get it to 1300 grams. My ready to go valve assembly weighs about 1100 grams. My valve is faster, lighter cheaper and and more powerful.

I made a video of the valve operating and just uploaded it to you tube.

Minggu, 10 Desember 2006

Tank pressure test success...

I did not have a small enough threading tool or tap to make the threads in the tank end cap. When I got a pipe tap I broke the tank when twisting it. So I'm doing it all again now that the fittings are threaded.... This give me the opportunity to take more pictures and weigh things....
The end caps:


The end cap weigh 40 gm for the blank end and 61 gm for the end with the fitting and pipe nipple.
The aluminum end caps weigh more than the whole rest of the tank. While the origional short tank had a mass ratio of 3.5. An 8 foot version constructed identically would have a MR of 6.7 .
To put this in persepctive, an aluminum sphere with 31000 psi UTS will have a MR of around 6.4. After I threaded the fittings I built a new tank that was about 18 inches long to try and pressure test. I took it by my friends at FloMetrics and we pressure tested it to 1500 psi. It did not fail at 1500 psi, that was just the limit of the water pump we were using to presurize it. The NPT threads around the pipe nipple leaked, but the tank held at 1500 PSI! Since I had used the pipe nipple as a winding post I could not tighten it to make the leak go away. I've been told that aluminum NPT pipe threads leak badly, but some things you need to learn yourself. If anyone has recommendations on a type of pipe fitting that can be used in aluminum and won't leak please let me know. Next time I get a dewar of LN2 I'm going to hook a pressure transducer to the tank and burst it at low temperature. I'll keep everyone posted.
I may also try fabricating some larger PET tubes and building a 4 or 6" tank.

A picture of the whole tank:I did not use any glue on the main part of the tank I only used "gorrilia" glue on the ends to secure the windings.

Sabtu, 09 Desember 2006

A test of pop bottles and kite string.


I spent the day fabricating a test tank. I machined some aluminum oring sealed end caps to go on a short length of florescent light tube cover. (Made out of PET or the same thing as a 2 liter soda bottle. )The aluminum end caps were machined with pins on the ends to hold the longitudinal lacing.

The tank ended up heavy with a MR of 3.5 using water, but its small and has a theoretical bust pressure of several thousand pounds. It was not meant to be a flight weight tank as it is short and should be much stronger than needed. Its more of a test piece to see if I can get anywhere near the predicted performance out of spectra wrapped tanks. I suspect that the failure mode when I pressure test it will be to blow out the o-ring seals.


On the left is a picture of the finished tank with a piece of unwrapped light tube next to it.
If the pressure test goes well, I will Ln2 pressure test to destruction. If both of those go well I'll try fabricating a larger more flight weight tank using the same concepts.



I'd taken some project pictures while working on things before I started blogging....
I'll post some of these from time to time...This is a picture of a 600lb Lox ethanol motor injector plate I fabricatedit last summer. We never fired it because we had valve problems and probably won't fire this one until we have more things to test. (Such as an igniter.)


Minggu, 03 Desember 2006

Another weekend gone...

Saturday I spent the day at the FAR//MTA site. I was working on some forms for another storage container at FAR. I'm on my knees digging in the desert sand with my hands to make room for the form , and I realized that building rockets this way was a lot like grilling a hamburger where the first step was to plant the grass to feed the cow....

The RRS was having its Christmas party the same day and the RRS/MTA had a few interesting things going on. I'm not all that taken with the unguided HPR soldis and hybrids they remind me of artillery. I did find the large 4000 lb thrust Lox methanol that was test fired interesting.
As Keven said "That was a manly sound" If you have ever heard a liquid rocket fired it is a sound that you will never forget. No recording I've ever heard did it justice.

A number of bits and pieces arrived this week. I got the solenoid valves I ordered from Predyne I got 6 valves in two different sizes these will be used for building an igniter and doing purges. Unlike Snaptite, predyne will sell in small quantities to normal people. So I can get more valves when I need them.




I also received my stainless steel Hemispheres from AMS industries to build some spherical stainless tanks.These are 18" diameter 316 Stainless. the thinist point is about 0.064 thick.
My son has finals next week, when that is done He will weld them up and we will hydro test them. I plan to use the same strap technique that Armadillo used to align them. (Thanks John for being so open and public!)



Lastly I spent Sunday working on my personal skills. As I indicated in my post on the CNC myth it takes skills to build things using CNC machines. I've spent about 18 months working with small CNC mills, but I have almost no time using a CNC lathe. So I spent the day with some scarp aluminum bar stock turning things to diameters and then making threads.
the straight threads took my 5 tries to get right... After I had all the bugs in that worked out
I made some tapered NPT pipe threads. I got that right on the first try. It does not look like much but the results:

Straight thread on the bottom and tapered pipe thread on the top.
The pipe thread is longer than it needs to be, but the taper is correct.