New Products Flash Sale
bob57hdt's blog View Details
Posted by bob57hdt | Aug 19, 2015 @ 10:30 PM | 1,652 Views
CHAPTER FOUR


STABS AND RUDDER


I do not remember the hot wire machine for the rudder and stabs. I do remember that they were cut with multiple wires. I have a vague image of the foam blocks, from the same foam as the wings, sitting vertically with a clamp that held the block in place. The arm with the wires was brought down around templates and cut the stabs and a different jig cut the rudder foam blanks. As I remember it, we got four or more elevators and four or more rudders from each block.

The horizontal stabs had hardwood leading edges glued in place and the root injected molded pieces were glued on. They were then sanded and prepared for the 1/64th (.4mm) ply skins to be applied. Special aluminum platens were also used to vacuum bag the horizontal pieces. Like the wings, there were holes in the foam, die-cut ply skins with holes for alignment and glued, vacuumed bagged and cured.

On the rudder, after the foam cores were cut and prepared, the injected molded rudder piece with control horn was glued into place and a wood wedge was glued to the bottom and a wood piece glued to the leading edge. As with the stabs, the die-cut 1/64th in. (.4mm) ply skins had glue applied, aligned and vacuum bagged in their special platens.

If you go to, and I highly recommend you do, www.hobiehawk.com, click on History on the left, scroll down to the Shop Tour of Ross models and check out the photos. On the left, second one down shows the air router that cut all those...Continue Reading
Posted by bob57hdt | Aug 07, 2015 @ 12:02 AM | 1,578 Views
Hobie told me he spent most of the time concentrating on the wing plan form, dihedral and airfoil. Ultimately it is the wing that makes the airplane, the rest is dressing on the cake. Boy did Hobie dress up the cake.

HOW A HOBIE HAWK WAS MADE

The following is from memory:

Chapter Three

WING

Rather than guessing, as I do not remember with any certainty about the airfoils origin I will only state that it is relatively thin under camber section and it works incredibly well. Brian Joder published information he got from Hobie I believe, so if you need to know more information, go here: http://hobiehawk.com/hist.html and scroll down to the bottom.

The Hobie Hawk is not a floater, that is to say, you cannot fly it just above a stall but it is very efficient and will thermal in light lift as long as you keep it going but still has the ability to penetrate pretty strong breezes on the slope. The elliptical dihedral was chosen for control and low drag. As with all wings and especially long slender wings that are common on sailplanes, wash out is extremely important.

SPECIAL NOTE: One very obvious trait the Hobie Hawk had was what many called the Hobie Rock. Because of the low drag clean aerodynamic wing design, when you would turn by inputting rudder command, the airplane would yaw, this means the tail of the airplane would go left if you wanted to turn right. This means that the right wing would speed up gaining lift, the left wing would slow down losing lift...Continue Reading
Posted by bob57hdt | Jul 30, 2015 @ 08:30 PM | 1,629 Views
Special thanks to Brian Joder for allowing us to use his pictures in this presentation


HOW A HOBIE HAWK WAS MADE
The following is from memory:

Chapter Two
FUSELAGE

We will start with the fuselage. To my knowledge, to this day, no RC Sailplane has gone to this extent to make a fuselage that offered such design advantages.

The nose piece: This was designed to be ultra strong and resilient, therefore rotational molded from natural polyethylene. The molds were made in a process called “vapor deposition”. This means that a plug (the male shape of the final part) was put into a chamber and literally coated with nickel, molecule by molecule until it was about .060” or 1/16” (1.6mm). This is far more accurate and precise process than electroplating as I did with my Dura-lene molds and more expensive too. The molds had two holes in them that a rod was slid through holding an aluminum insert for the main wing rod and a brass tube for the alignment wing rod. A pre-measured amount of polyethylene powder was poured into the mold, the mold was closed and bolted together and mounted on a arm that would go into a large 10 ft. X 10 ft. oven. This arm had gears on it so each of the several nose molds would rotate in every axis. The oven door would close and the interior would heat up to 400 degrees. The arm would continue to rotate for approximately 45 minutes. During this time, the interior of each mold would get hotter and hotter until the powdered polyethylene...Continue Reading
Posted by bob57hdt | Jul 27, 2015 @ 11:25 PM | 2,132 Views
HOW A HOBIE HAWK WAS MADE
The following is from memory:


NOTE: Brian Joder has a website called www.hobiehawk.com where he has collected a lot of great information about Hobie and the Hobie Hawk you will undoubtedly find very interesting. Also on this site are pictures of some of the equipment used to produce the Hobie Hawk. Every tool, jig, fixture, mold or machine was designed for one purpose...Making a Hobie Hawk and in today's dollars we are looking at over $2 million dollars investment.....Hobie never did anything that wasn't first class !


Chapter One
A LITTLE HISTORY
When Hobie got the bug to fly an RC sailplane he was frustrated that he could not buy something and go fly that day! He thought there must be many people like him that would enjoy flying if they could just go buy something and not spend days, weeks or months building. Hobie decided to design and manufacturer the Hobie Hawk and he had two primary goals. First, he wanted a sailplane that anyone could walk into a Hobby Shop and buy that was completely built and ready to fly. Second, he wanted to make sure that if you needed a replacement part, every part made, no matter how long it had been since you bought yours, the new parts would fit as good as the original. Of course, all this must be Hobie quality.

First he had to design the Hobie Hawk and he told me that he tried many designs before he came up with the final design. Early prototypes were not the sophisticated super ship we have come...Continue Reading
Posted by bob57hdt | Jul 26, 2015 @ 11:23 AM | 1,562 Views
Hi everyone. There have been numerous people that have asked questions and there have been some threads started that have people asking about how the Hobie Hawk was actually built. Some of the answers are close and some are speculation. There is information available like that of Brian Joder's www.hobiehawk.com and the info there about Ross Models but I am unable to locate an accurate step by step description of the making of a Hobie Hawk. In the coming weeks, I will attempt, from memory and help from others just how a Hobie Hawk was created from raw materials to finish masterpiece.

There is a thread started by cmwhite that is a great place for you to post your personal experiences with the legendary Hobie Hawk. Please do so. I will monitor that thread and if you have questions, please ask them and I will try to answer.

Here is the location: http://www.rcgroups.com/forums/showt...7#post32253984

Come back here periodically to read the Real Story of the making of a Legend.

Bob
Posted by bob57hdt | Jun 30, 2015 @ 08:37 PM | 1,855 Views
Friends Fog and Future 7-1-15

As we grow up we can take many directions. Some follow traditional paths that is expected of us, or that family has traveled before us. Grow up like our father or grandfather or if of the female gender our mother or grandmother. Some will live their lives within a few miles of their parents, grandparents and have close relationships with their families. Brothers, sisters, cousins, parents and grandparents and lots of friendships with people you grew up with, went to school with or worked with.

I was born an only child, so I did not have brothers and sisters. My father was out of my life at a very early age, we moved often so I went to 5 schools in 6 years and so I grew up finding things to do by myself. I found that creating things with my hands always made me happy. As I grew up I learned many skills and I loved to study things and see what made them tick. My other fascination that began before I started school was aviation and more specifically airplanes. These were magically things that were heavier than air, carried people and all of this done with some invisible force.

What has this got to do with our hobby? Only this.....In many ways our hobby is like a family. My fascination with aircraft is why model airplanes were always in my life. It is why that I studied sailplanes when Katie wanted one and why I felt I wanted to create designs of my own.

Back to the family part...by time I lost Katie late in 2010, modeling...Continue Reading
Posted by bob57hdt | Apr 20, 2015 @ 03:20 PM | 2,280 Views
Pete (PGR) brought up the idea for an event shirt for this years Katie Martin Global Tribute. Others agree it is a good idea and I thought it might be nice to have shirts that people could wear and continue to honor Katie all year long.
I have not bought event shirts since the days of the Schneider Cup RC event I promoted here in Lake Havasu in the late 80's and early 90's. We had thousands of people attend and we would sell 500 to 1000 shirts, so the cost per shirt was quite low.

For Katie's Tribute the attendance is less than 100 so the quantity would be low and the unit price would be high. I then thought about our enthusiastic friends in Spain and Venezuela. I am sure some of them would like to have a shirt too. I then thought about all of the people that have participated in the Katie Tribute Threads but because of schedules, distance and cost cannot attend in person but do so in spirit.

By including all of these groups we should be able to get enough orders that the unit cost would be reasonable and we would not have to charge an arm and a leg.
As with the raffle, all profits will go to the American Heart Association in Katie's name.

This shirt has to be of high quality....after all it is all about Katie. Second, as suggested, it will have the image of Katie launching a SR-7, you know the one that was on the cover of RCM magazine many years ago and the image I use for my avatar here on RC Groups.Name: SR7KatieCover.jpg
Views: 0
Size: 52.4 KB
Description:

We are looking into Tee-Shirts primarily, however...Continue Reading
Sticky: New SR-7?
Posted by bob57hdt | Mar 24, 2015 @ 01:14 AM | 3,454 Views
Back in early 1980's, after the SR-7 had established itself as the go fast slope soarer, I would occasionally get letters or phone calls (remember, we did not have the internet or emails) asking what was next. Puzzle I would ask, what do you mean next?
They would explain to me that they have a SR-7 and they are looking for something faster. Faster? Have you run out of airplane? After some discussion I found out that when they first showed up at their flying site with their brand new SR-7 they were the king of the hill. Eventually other flyers got SR-7's and soon our hero no longer had the fastest ship in the air. What he was looking for was something that would again put him out in front.

I do not blame him, is some ways I created the SR-7 to do just that.....allow me to show that I could design something that would dominate the slope.

As I have stated before, the SR-7 was a no compromise slope plane that was designed to go fast and roll rapidly. It was not good at a lot of things but those that is was designed for, it did well. We often look for easy solutions to perceived problems. Being the best, fastest, smartest or best at anything else requires effort. Buying the latest may make you the best for a while, but as soon as someone else buys one.....there goes your advantage, now it comes down to effort to stay the best.

As my journey with Katie through the years in this great hobby, I got distracted and found that being a big fish in a small pond is OK for...Continue Reading
Posted by bob57hdt | Mar 18, 2015 @ 12:39 AM | 3,216 Views
I received this email and it really upset me. I tried to keep politics and religion out of my business activities. I strongly believe in this country, the rights and freedoms we all enjoy every day of our lives here in the USA. Many years ago I had the freedom to follow my dream and create Bob Martin RC Models and successfully pursue it, not only as a hobby but luckily as a business that supported my wife Katie and I.
This all happened during a period of time in our nations history when we were in a war overseas that became very unpopular, particularly with the younger people.
I will not comment on the right or wrong of that war, but many of my friends answered the call of their country and many died for their country in that conflict.
Today I read where the government of the US as well as other countries are arresting people that are trying to go to Syria to join terrorist groups. This is giving aid and comfort to the enemy. Back in the days of the Vietnam war, Jane Fonda, because of her celebrity and money, went to North Vietnam, a country we were at war with, betrayed our captured servicemen, posed sitting in an anti-aircraft battery, and in general, gave aid and comfort to the enemy, an act of treason, normally punishable by jail time or even execution. She returned to the US and was never punished in any way and now being honored?
I am sorry if I offend anyone, but read this email completely and make up your own mind.

Jane Fonda was on TV 3 times last...Continue Reading
Posted by bob57hdt | Jan 09, 2015 @ 05:40 PM | 3,370 Views
Hello friends,

THIS YEARS KATIE MARTIN INTERNATIONAL TRIBUTE WILL BE ON JUNE 6TH, 2015

For those of you who may not know why there is a Katie Martin Tribute, I will try to explain how it all began and how it has grown into an International Tribute.

When I lost Katie, I spent months wallowing in self pity. Why me, why Katie, why, why, why!
Some close modeling friends saw that I was spiraling out of control and wanted to do something to help me. Thank God for friends! Two of them approached me and suggested a sailplane safari...you know where you grab your sailplanes and go from one flying site to another. There are no known flying sites within a few hundred miles so we planed to start at Torrey Pines and go from there. Brent Daily and Scott Baude suggested we would dedicate this to Katie. Scotts partner at Xtreme Power Systems, Jim Drew joined in and as time passed more and more friends heard about the road trip and my good friend Eric (oldschooler) started a thread on RC Groups and the next thing we know it became the Katie Martin Tribute Fly in. After the great success of the first year, our host, the Torrey Pines Gulls and others suggested we make it an annual event. Each year manufacturers and modelers have come forth with donations for the raffle. I have tried to find things that would be valued by attendees for the raffle. I have donated, the original Talon that was both the kit label aircraft and also Katie's personal Talon, a fiberglass SR-7 that I was...Continue Reading
Posted by bob57hdt | Dec 31, 2014 @ 11:26 AM | 3,457 Views
Hello everyone,
First of all I would like to wish all of you a very Happy New Year. As I have thousands of followers of this blog, many I do not personally know, I wanted to use this medium to pass on my best wishes to all of you for a very happy, healthy, peaceful and prosperous new year. As we reflect on those things that we did, didn't do, thought about and planned for in 2014 and look forward to new plans for the new year, I sincerely hope that you will achieve many if not all of your goals. Remember that family and health are most important as nothing else has substance without those.
Katie and I always made out New Years Resolutions. We would type them up and exchanged them on New Years so that we could help each other succeed in those resolutions. Not surprisingly was that in each case, we both listed "Finding a way, each and every day to make the other smile, giggle and be healthy and happy." These were our first and most important efforts every day of our married lives.
Having lost my one and only, I realize that those efforts were not in vane as we had so many years of happiness through good times and bad, we always had each other and the constant love that produced.
We live in a different time than when Kathy, or Katie to you, were married. We have been credited with providing many of you with the joy of our aircraft and slope soaring. I would like to offer the above to all of you, that if in time of stress in your life, try making someone else your object of good will, make them feel special, bring a laugh, a giggle or at least a smile on their face and you will find it very satisfying and much of the stress will leave you and you too will be much happier.
God bless all of you and may your New Year be one of great health, happiness and prosperity.
Sincerely,
Katie Martin (in Spirit)
Bob Martin
Posted by bob57hdt | Oct 30, 2014 @ 08:17 PM | 4,256 Views
This entry is a little long to post on the thread so I have chosen to make an entry to my Blog so I can clearly explain and answer the many comments on the SR-7 copies thread on RC Groups Slope forums.

First of all, I have read all the comments from Johnfh, Tspin, Douwe, droydx, MATIN, ClayH, 67econoline, Speedfreeeek, chip.greely and TFLG.
Let us first address the idea that when a manufacturer stops production he is abandoning his customers. As much as we like to consider it a sport or hobby to us, it is a business to the manufacturer and if sales drop too low, it is not cost effective to continue to produce that product.
As for the aspect of copyrights or design patents. Copyrights do not cover designs and design patents are very expensive and few if any model airplane designs warrant such protection. As mentioned, Ford or Boeing offer products that cost tens of thousands or millions of dollars and are protected because they warrant it.
So the bottom line is "Does Bob Martin or any designer have the right to prevent someone else from producing his design?" The answer is NO!
"How does Bob Martin feel about other people making replacement parts for his designs?" I am flattered by the idea that people would still want to build and fly my designs, especially as one poster mentioned, there are faster and more maneuverable planes available today.
I am also honored that there are a large number of flyers out there that have come to my defense. Some...Continue Reading
Posted by bob57hdt | Sep 12, 2014 @ 11:58 PM | 4,097 Views
Katie vs Katie II vs Katie II v 2.0

I noticed Kathryn A. Kolan during my senior year in High School. There was something really special about her but we never really got to know each at school. The year following our graduation a mutual friend of ours was going into the Army and so we had a going away party for him at a roller skating rink. I was floor manager and told Kathy that I would let her in free if she wanted and she excepted. This was our first sort of date and I found she was a very good skater and we danced to almost every song. I asked her out the following week, she accepted and four months later we were married.

I bring up this early meeting because she was Kathryn or Kathy in those days. It was many years later that she acquired the name Katie.

It was in the spring of 1968. We had moved from Oregon to Southern California a couple of years earlier to seek our fortune in the land of plenty.....so we thought. We each had held a couple of jobs and Kathy went to work for Douglas Oil Company, downtown Los Angeles. This worked out great because I was working for Crocker Citizens Bank in administrative headquarters only a couple of blocks away.

It was during this time that Kathy was asked to pick another name. Kathy was hired into the data processing department of Douglas Oil. There was a very unpopular girl there that approached Kathy and said, “My name is Kathy and there can only be ONE Kathy in this department!” Kathy is a strong person and in...Continue Reading
Posted by bob57hdt | Aug 26, 2014 @ 10:06 PM | 3,644 Views
Recently a gentleman place a Limited Edition of the SR-7 up for bid on ebay. It started at $1 but rapidly reached $618.00. I was amazed and then I received an email from him telling me the story of him growing up, the sacrifices his father made so he could enjoy this great hobby. He also mentioned he had read this blog and asked that I expand on the history of Katie and the Katie II. I will put on my thinking cap and in the next few days I will add a chapter to this blog about the history of the Katie II.
Bob
Posted by bob57hdt | Jun 08, 2014 @ 10:02 PM | 4,173 Views
I do not know why, maybe June 6th was Katie and my 50th anniversary, we learned a close friends brother died , or what but I was not in the mood to fly during the Tribute this year. I chose to read the dedication instead of flying Katie and her Hobie Hawk, so I asked Brent Daily again to fly her, and he did so with great skill and grace.

I spend time to compose a dedication that is worthy of the people we are honoring. Sometimes rewriting several times, as I am not a great writer. Because of the deep emotions I still feel for Katie, I was unable to get very far along on the presentation and so I offer it here for those that would like to see what I was suppose to say. Here it is:

Katie Martin Global Tribute 6-7-2014

I want to thank all of you, our friends, family, partners, business associates, raffle sponsors and the Torrey Pines Gulls for making this all happen. I would also like to thank our friends again in Great Britain, Spain and Venezuela for making this Tribute to Katie Martin a Global event. As with Katie, I am honored and humbled that you here and around the world have chosen to come together to pay respect and to honor Katie Martin.

As you all know from past events and my blog, I bought Katie a Hobie Hawk, the same one we fly here today, as her first RC sailplane and that put us on a course and directed us toward the business of Bob Martin RC Models. This year, someone else that indirectly helped us toward being in the RC Hobby and that was
...Continue Reading
Posted by bob57hdt | May 18, 2014 @ 01:38 PM | 20,013 Views
A friend stopped by my house the other day and we had a long talk about many things. He lives here in Lake Havasu City, AZ, is a member of our local RC club, knew Katie, bought from Major Hobby and bought some our balsa wood that we liquidated when we shut down Bob Martin RC Models.
He told me that he and his family are planning on coming to the Katie Martin Global Tribute this year and has found and built a Katie II for the occasion.
During our conversation he mentioned he had read this blog and although he knew much of what I have revealed, he discovered things he did not know.
One thing he thought would be of interest to many modelers, is the time frame that each of these event happened. If this is of interest to you, let me know and I will put dates to go with all of the events presented in this blog. If there is anything that you did not discover and wish to know more about, also let me know.
Right now I am building a mini-Coyote from Venezuela for the Katie Tribute next month. It is strange to be building something you are so familiar with yet it is different. It is nice to be building again.....Thanks Gonzalo.
Posted by bob57hdt | May 09, 2014 @ 06:47 PM | 4,949 Views
Back in early 1980 we purchased the tooling to manufacturer Hobie Hawks. Along with this purchase we were fortunate to have many visits from Hobie Alter and we hired his engineer that developed the tooling to get the tooling back into shape. Long story and maybe if the interest is there, I will write a separate blog on that whole adventure.
Back to this subject. As the elliptical wing shape causes many problem in covering with monokote or any film covering, I will tell you how the original wings were done. You may have one of the original Hobie Hawks that came painted, covered and in some cases radio installed and balanced.
There was a board, like an ironing board that sat approximately 4 inches above the table the exact shape of the wing panel but was approximately 1/4 inch smaller. On one end there was a metal plate that had a hole in it and when you inserted a wing rod through the hole and into the wing, it would hold the wing down against the table. At the other end there was a U shaped plastic clamp that would hold the wing down flat against the board. YES, the wing was flattened out and covered. Once covered, it was removed and a heat gun was used to tighten up the covering.
The bottom is much easier, however the under-camber can cause some problems if you do not follow this procedure.
It helps if you have the right tools. Like the top, you will need a good, I prefer 21st Century iron and any of the many heat guns. An added tool that can be of great help on...Continue Reading
Posted by bob57hdt | Aug 10, 2013 @ 12:09 AM | 5,122 Views
The beginning of the end

Katie and I loved the model airplane hobby and had dedicated ourselves to it for about twenty five years. We had survived economic recessions that devastated hobby sales. During the down turn in the countries economy, the first thing that goes is the recreational items. Keeping the family fed, the house and car paid for naturally come first and if there are additional funds, and then you think about your hobby.

We had survived three business situations that were financially crippling and caused us to find another way to stay in this business we loved so much. We were surviving, but we began to doubt ourselves and our future in this business.

We had become the sole hobby shop in Lake Havasu and we were surviving because of the mail order business of Major Hobby. The sales of Hitec and our proprietary products was our main source of income. In order to be competitive with all the other stuff, we had to sell it at near zero profit. It always amazed us how customers would come in, look at a product and then order it from another mail order company whose price was the same. It was not that they did not like us but they did not want to pay the sales tax, even though they could take it home today. Instead, they would pay shipping and wait a week. We never could get use to this. Don’t get me wrong, many customers, mostly those who would come to Lake Havasu for the winters, would come into the shop and be grateful to have a hobby shop with great...Continue Reading
Posted by bob57hdt | Aug 01, 2013 @ 09:26 PM | 5,521 Views
Trying to Survive

I felt really good about being in control of our production. We had achieved a manufacturing facility that was capable of producing a large volume of kits at a very high level of quality. We had our new oven operating very well with high quality Dura-lene fuselages. We had done everything possible to survive in this very competitive business from a manufacturing standpoint.

It is not enough to produce a good product, nor one that was of high quality, it also had to be competitive in price. Even then, you had to have a distribution network that could stock, promote and sell the volume you could produce.

Let us discuss price first. By processing nearly all of the contents of the kit in house, you would be manufacturing them at the lowest possible price. Our costs were a little higher because we rejected more parts because of flaws or stress cracks in the wood or other irregularities than most other companies.

The industry as it was in the 70’s consisted of a distributor, dealer network. In this world, a manufacturer would advertise his products in wholesale and retail magazines to get dealers and distributors to buy and stock your products. This was difficult for small or unknown manufacturers as the dealers and distributors wanted to see consumers asking for the product at a dealer before they would risk investing their money. This is a catch 22. Most small manufacturers began selling in person directly to individuals or to hobby stores....Continue Reading
Posted by bob57hdt | Jul 21, 2013 @ 08:21 PM | 5,239 Views
Starting over

We owned a home in California that we needed to sell. We had taken out a 2nd mortgage as part of the down payment to buy HOB but when it sells, we will again have some cash to operate on. At the moment, we were trying to move our home and business to another state and we were pretty much broke. Thank goodness we still had good credit and so we borrowed some money to tide us over.

When you have a lot of equipment, long kitting tables, and parts shelves, storage for boxes, plans etc. it takes a lot of room. We found a 2,500 sq. ft. building that was very reasonable and it had a loading dock. We were able to back our trailer up to it and using a pallet jack, we were able to start unloading and setting up our business.

I mentioned before that I purchase the equipment from Gene Walach to process the shaped parts for the Dura-lene kits. I no longer had the equipment to process our sheets, sticks and triangle balsa so I would have to buy them from someone. I knew the cost would be higher but what could I do.

Our newly released Talon, and the Bobcat and Pussycat were selling very well as were the .20 size ET and ET-40 power trainers and we were going through a lot of balsa and lite ply. Balsa wood is a very unique wood in that it has the highest variation in density (soft to hard) of any wood and the grain is very important to where it is used in the kit. These variables make it difficult to order and if you request selected grains, it runs the cost up....Continue Reading